Cypress Computer Hardware CY7C65113C User Manual

CY7C65113C  
USB Hub with Microcontroller  
USB Hub with Microcontroller  
Cypress Semiconductor Corporation  
Document #: 38-08002 Rev. *D  
198 Champion Court  
San Jose, CA 95134-1709  
408-943-2600  
Revised March 6, 2006  
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CY7C65113C  
LIST OF FIGURES  
Figure 11-1. I2C Configuration Register ...............................................................................................20  
Figure 12-1. I2C Data Register .............................................................................................................21  
Figure 12-2. I2C Status and Control Register .......................................................................................21  
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CY7C65113C  
LIST OF TABLES  
Table 11-1. I2C Port Configuration .......................................................................................................20  
Table 12-1. I2C Status and Control Register Bit Definitions .................................................................21  
Table 18-2. Decode table for Table 18-3: “Details of Modes for Differing Traffic Condition .................40  
Table 18-3. Details of Modes for Differing Traffic Conditions ...............................................................41  
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CY7C65113C  
1.0  
Features  
Full Speed USB hub with an integrated microcontroller  
8-bit USB optimized microcontroller  
— Harvard architecture  
— 6-MHz external clock source  
— 12-MHz internal CPU clock  
— 48-MHz internal hub clock  
Internal memory  
— 256 bytes of RAM  
— 8 KB of PROM  
2
Integrated Master/Slave I C-compatible Controller (100 kHz) enabled through General-purpose I/O (GPIO) pins  
I/O ports  
— Two GPIO ports (Port 0 to 2) capable of sinking 7 mA per pin (typical)  
— Higher current drive achievable by connecting multiple GPIO pins together to drive a common output  
— EachGPIOport can be configured asinputs withinternalpull-ups or open drain outputsor traditional CMOS outputs  
— Maskable interrupts on all I/O pins  
12-bit free-running timer with one microsecond clock ticks  
Watchdog timer (WDT)  
Internal Power-on Reset (POR)  
USB Specification compliance  
— Conforms to USB Specification, Version 1.1  
— Conforms to USB HID Specification, Version 1.1  
Supports one or two device addresses with up to 5 user-configured endpoints  
Up to two 8-byte control endpoints  
Up to four 8-byte data endpoints  
Up to two 32-byte data endpoints  
— Integrated USB transceivers  
Supports four downstream USB ports  
— GPIO pins can provide individual power control outputs for each downstream USB port  
— GPIO pins can provide individual port over current inputs for each downstream USB port  
Improved output drivers to reduce electromagnetic interference (EMI)  
Operating voltage from 4.0V to 5.5V DC  
Operating temperature from 0° to 70° C  
Available in 28-pin SOIC (-SXC) package  
Industry-standard programmer support.  
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CY7C65113C  
2.0  
Functional Overview  
The CY7C65113C device is a one-time programmable 8-bit microcontroller with a built-in 12-Mbps USB hub that supports up to  
four downstream ports. The microcontroller instruction set has been optimized specifically for USB operations, although the  
microcontrollers can be used for a variety of non-USB embedded applications.  
GPIO  
The CY7C65113C has 11 GPIO pins (P0[7:0], P1[2:0]), both rated at 7 mA per pin (typical) sink current. Multiple GPIO pins can  
be connected together to drive a single output for more drive current capacity.  
Clock  
The microcontroller uses an external 6-MHz crystal and an internal oscillator to provide a reference to an internal phase-locked  
loop (PLL)-based clock generator. This technology allows the customer application to use an inexpensive 6-MHz fundamental  
crystal that reduces the clock-related noise emissions (EMI). A PLL clock generator provides the 6-, 12-, and 48-MHz clock signals  
for distribution within the microcontroller.  
Memory  
The CY7C65113C is offered with 8 KB of PROM.  
Power-on Reset, Watchdog, and Free-running Timer  
These parts include power-on reset logic, a Watchdog timer, and a 12-bit free-running timer. The POR logic detects when power  
is applied to the device, resets the logic to a known state, and begins executing instructions at PROM address 0x0000. The  
Watchdog timer is used to ensure the microcontroller recovers after a period of inactivity. The firmware may become inactive for  
a variety of reasons, including errors in the code or a hardware failure such as waiting for an interrupt that never occurs.  
2
I C  
2
The microcontroller can communicate with external electronics through the GPIO pins. An I C-compatible interface accommo-  
dates a 100-kHz serial link with an external device.  
Timer  
The free-running 12-bit timer clocked at 1 MHz provides two interrupt sources, 128-µs and 1.024-ms. The timer can be used to  
measure the duration of an event under firmware control by reading the timer at the start of the event and after the event is  
complete. The difference between the two readings indicates the duration of the event in microseconds. The upper four bits of  
the timer are latched into an internal register when the firmware reads the lower eight bits. A read from the upper four bits actually  
reads data from the internal register, instead of the timer. This feature eliminates the need for firmware to try to compensate if the  
upper four bits increment immediately after the lower eight bits are read.  
Interrupts  
The microcontroller supports ten maskable interrupts in the vectored interrupt controller. Interrupt sources include the USB Bus  
Reset interrupt, the 128-µs (bit 6) and 1.024-ms (bit 9) outputs from the free-running timer, five USB endpoints, the USB hub, the  
2
GPIO ports, and the I C-compatible master mode interface. The timer bits cause an interrupt (if enabled) when the bit toggles  
from LOW ‘0’ to HIGH ‘1’. The USB endpoints interrupt after the USB host has written data to the endpoint FIFO or after the USB  
controller sends a packet to the USB host. The GPIO ports also have a level of masking to select which GPIO inputs can cause  
a GPIO interrupt. Input transition polarity can be programmed for each GPIO port as part of the port configuration. The interrupt  
polarity can be rising edge (‘0’ to ‘1’) or falling edge (‘1’ to ‘0’).  
USB  
The CY7C65113C includes an integrated USB Serial Interface Engine (SIE) that supports the integrated peripherals and the hub  
controller function. The hardware supports up to two USB device addresses with one device address for the hub (two endpoints)  
and a device address for a compound device (three endpoints). The SIE allows the USB host to communicate with the hub and  
functions integrated into the microcontroller. The CY7C65113C part includes a 1:4 hub repeater with one upstream port and four  
downstream ports. The USB Hub allows power management control of the downstream ports by using GPIO pins assigned by  
the user firmware. The user has the option of ganging the downstream ports together with a single pair of power management  
pins, or providing power management for each port with four pairs of power management pins.  
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CY7C65113C  
Logic Block Diagram  
6-MHz crystal  
USB  
Transceiver  
D+[0]  
D–[0]  
Upstream  
USB Port  
Downstream USB Ports  
PLL  
USB  
Transceiver  
D+[1]  
D–[1]  
48 MHz  
Clock  
12-MHz  
8-bit  
CPU  
USB  
Transceiver  
Divider  
D+[2]  
D–[2]  
12 MHz  
Repeater  
USB  
SIE  
USB  
Transceiver  
PROM  
8 KB  
D+[3]  
D–[3]  
USB  
Transceiver  
RAM  
256 byte  
Interrupt  
Controller  
D+[4]  
D–[4]  
6 MHz  
Power management under firmware  
control using GPIO pins  
12-bit  
Timer  
P0[0]  
P0[7]  
GPIO  
PORT 0  
Watchdog  
Timer  
P1[0]  
P1[2]  
GPIO  
PORT 1  
Power-on  
Reset  
2
SCLK  
SDATA  
I C comp.  
Interface  
2
*I C-compatible interface enabled by firmware through  
P1[1:0]  
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CY7C65113C  
3.0  
Pin Configurations  
Top View  
CY7C65113C  
28-pin SOIC  
XTALOUT  
XTALIN  
1
2
3
4
28  
27  
26  
V
CC  
P1[1]  
P1[0]  
P1[2]  
D–[3]  
D+[3]  
D–[4]  
D+[4]  
V
REF  
GND  
D+[0]  
D–[0]  
D+[1]  
D–[1]  
D+[2]  
D–[2]  
P0[7]  
P0[5]  
P0[3]  
P0[1]  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
5
6
7
8
9
GND  
10  
11  
12  
13  
14  
V
PP  
P0[0]  
P0[2]  
P0[4]  
P0[6]  
4.0  
4.1  
Product Summary Tables  
Pin Assignments  
Table 4-1. Pin Assignments  
Name  
I/O  
I/O  
I/O  
I/O  
I/O  
I/O  
I/O  
28-pin  
Description  
D+[0], D–[0]  
D+[1], D–[1]  
D+[2], D–[2]  
D+[3], D–[3]  
D+[4], D–[4]  
P0  
5, 6  
Upstream port, USB differential data.  
7, 8  
Downstream Port 1, USB differential data.  
Downstream Port 2, USB differential data.  
Downstream Port 3, USB differential data.  
Downstream Port 4, USB differential data.  
GPIO Port 0 capable of sinking 7 mA (typical).  
9, 10  
23, 24  
21, 22  
P1[7:0]  
11, 15, 12, 16, 13, 17, 14, 18  
P1  
I/O  
P1[2:0]  
25, 27, 26  
GPIO Port 1 capable of sinking 7 mA (typical).  
XTAL  
XTAL  
IN  
2
6-MHz crystal or external clock input.  
6-MHz crystal out.  
IN  
OUT  
1
OUT  
V
V
19  
28  
4, 20  
3
Programming voltage supply, tie to ground during normal operation.  
PP  
CC  
Voltage supply.  
Ground.  
GND  
V
IN  
External 3.3V supply voltage for the downstream differential data output  
buffers and the D+ pull-up.  
REF  
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CY7C65113C  
4.2  
I/O Register Summary  
I/O registers are accessed via the I/O Read (IORD) and I/O Write (IOWR, IOWX) instructions. IORD reads data from the selected  
port into the accumulator. IOWR performs the reverse; it writes data from the accumulator to the selected port. Indexed I/O Write  
(IOWX) adds the contents of X to the address in the instruction to form the port address and writes data from the accumulator to  
the specified port. Specifying address 0 (e.g., IOWX 0h) means the I/O register is selected solely by the contents of X.  
All undefined registers are reserved. Do not write to reserved registers as this may cause an undefined operation or increased  
current consumption during operation. When writing to registers with reserved bits, the reserved bits must be written with ‘0.’  
Table 4-2. I/O Register Summary  
Register Name  
Port 0 Data  
I/O Address Read/Write  
Function  
Page  
17  
19  
19  
18  
20  
20  
20  
21  
0x00  
0x01  
0x04  
0x05  
0x08  
0x09  
0x10  
0x11  
R/W  
R/W  
W
GPIO Port 0 Data  
GPIO Port 1 Data  
Port 1 Data  
Port 0 Interrupt Enable  
Port 1 Interrupt Enable  
GPIO Configuration  
Interrupt Enable for Pins in Port 0  
Interrupt Enable for Pins in Port 1  
GPIO Port Configurations  
W
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R
2
2
I C Configuration  
I C Position Configuration  
USB Device Address A  
EP A0 Counter Register  
EP A0 Mode Register  
EP A1 Counter Register  
EP A1 Mode Register  
EP A2 Counter Register  
EP A2 Mode Register  
USB Status & Control  
Global Interrupt Enable  
Endpoint Interrupt Enable  
Interrupt Vector  
USB Device Address A  
USB Address A, Endpoint 0 Counter  
USB Address A, Endpoint 0 Configuration  
USB Address A, Endpoint 1 Counter  
USB Address A, Endpoint 1 Configuration  
USB Address A, Endpoint 2 Counter  
USB Address A, Endpoint 2 Configuration  
USB Upstream Port Traffic Status and Control  
Global Interrupt Enable  
0x12  
0x13  
0x14  
0x15  
0x16  
0x1F  
0x20  
0x21  
0x23  
0x24  
0x25  
0x26  
0x28  
0x29  
0x30  
0x31  
0x32  
0x38-0x3F  
0x40  
0x41  
0x42  
USB Endpoint Interrupt Enables  
Pending Interrupt Vector Read/Clear  
Lower Eight Bits of Free-running Timer (1 MHz)  
Upper Four Bits of Free-running Timer  
Watchdog Reset Clear  
Timer (LSB)  
R
Timer (MSB)  
R
WDR Clear  
W
2
2
I C Control & Status  
R/W  
R/W  
I C Status and Control  
2
2
I C Data  
I C Data  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
USB Device Address B  
EP B0 Counter Register  
EP B0 Mode Register  
R/W  
R/W  
R/W  
USB Device Address B (not used in 5-endpoint mode) 34  
USB Address B, Endpoint 0 Counter  
USB Address B, Endpoint 0 Configuration, or  
USB Address A, Endpoint 3 in 5-endpoint mode  
EP B1 Counter Register  
EP B1 Mode Register  
0x43  
0x44  
R/W  
R/W  
USB Address B, Endpoint 1 Counter  
USB Address B, Endpoint 1 Configuration, or  
USB Address A, Endpoint 4 in 5-endpoint mode  
Hub Port Connect Status  
Hub Port Enable  
0x48  
0x49  
0x4A  
R/W  
R/W  
R/W  
Hub Downstream Port Connect Status  
Hub Downstream Ports Enable  
Hub Downstream Ports Speed  
Hub Port Speed  
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CY7C65113C  
Table 4-2. I/O Register Summary (continued)  
Register Name  
Hub Port Control (Ports [4:1])  
Hub Port Suspend  
I/O Address Read/Write  
Function  
Page  
0x4B  
0x4D  
0x4E  
0x4F  
0x50  
0x51  
0xFF  
R/W  
R/W  
R
Hub Downstream Ports Control (Ports [4:1])  
Hub Downstream Port Suspend Control  
Hub Downstream Ports Resume Status  
Hub Downstream Ports SE0 Status  
Hub Port Resume Status  
Hub Ports SE0 Status  
Hub Ports Data  
R
R
Hub Downstream Ports Differential Data  
Hub Downstream Ports Force LOW (Ports [1:4])  
Microprocessor Status and Control Register  
Hub Downstream Force Low  
Processor Status & Control  
R/W  
R/W  
4.3  
Instruction Set Summary  
Refer to the CYASM Assembler User’s Guide for more details. Note that conditional jump instructions (i.e., JC, JNC, JZ, JNZ)  
take five cycles if jump is taken, four cycles if no jump.  
Table 4-3. Instruction Set Summary  
MNEMONIC  
HALT  
operand  
opcode  
00  
cycles  
MNEMONIC  
NOP  
operand  
acc  
opcode  
20  
cycles  
7
4
6
7
4
6
7
4
6
7
4
6
7
4
6
7
4
6
7
4
6
7
5
7
8
4
5
6
4
5
4
4
4
7
8
4
4
7
8
5
5
4
4
5
5
5
5
5
6
7
8
7
8
7
8
6
4
4
4
4
4
ADD A,expr  
data  
01  
02  
03  
04  
05  
06  
07  
08  
09  
0A  
0B  
0C  
0D  
0E  
0F  
10  
11  
INC A  
21  
22  
23  
24  
25  
26  
27  
28  
29  
2A  
2B  
2C  
2D  
2E  
2F  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
3A  
3B  
3C  
3D  
3E  
ADD A,[expr]  
ADD A,[X+expr]  
ADC A,expr  
direct  
index  
data  
INC X  
x
INC [expr]  
INC [X+expr]  
DEC A  
direct  
index  
acc  
ADC A,[expr]  
ADC A,[X+expr]  
SUB A,expr  
direct  
index  
data  
DEC X  
x
DEC [expr]  
DEC [X+expr]  
IORD expr  
IOWR expr  
POP A  
direct  
index  
address  
address  
SUB A,[expr]  
SUB A,[X+expr]  
SBB A,expr  
direct  
index  
data  
SBB A,[expr]  
SBB A,[X+expr]  
OR A,expr  
direct  
index  
data  
POP X  
PUSH A  
OR A,[expr]  
direct  
index  
data  
PUSH X  
OR A,[X+expr]  
AND A,expr  
SWAP A,X  
SWAP A,DSP  
MOV [expr],A  
MOV [X+expr],A  
OR [expr],A  
OR [X+expr],A  
AND [expr],A  
AND [X+expr],A  
XOR [expr],A  
XOR [X+expr],A  
IOWX [X+expr]  
CPL  
AND A,[expr]  
AND A,[X+expr]  
XOR A,expr  
direct  
index  
data  
direct  
index  
direct  
index  
direct  
index  
direct  
index  
index  
12  
13  
14  
15  
16  
17  
18  
19  
1A  
1B  
1C  
1D  
1E  
XOR A,[expr]  
XOR A,[X+expr]  
CMP A,expr  
CMP A,[expr]  
CMP A,[X+expr]  
MOV A,expr  
MOV A,[expr]  
MOV A,[X+expr]  
MOV X,expr  
MOV X,[expr]  
reserved  
direct  
index  
data  
direct  
index  
data  
direct  
index  
data  
ASL  
ASR  
direct  
RLC  
RRC  
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CY7C65113C  
Table 4-3. Instruction Set Summary (continued)  
MNEMONIC operand opcode cycles  
XPAGE 1F  
MNEMONIC  
RET  
operand  
opcode  
3F  
cycles  
4
4
4
4
8
4
4
8
MOV A,X  
MOV X,A  
MOV PSP,A  
CALL  
40  
DI  
70  
41  
EI  
72  
60  
RETI  
JC  
73  
addr  
50-5F  
80-8F  
90-9F  
A0-AF  
B0-BF  
10  
addr  
C0-CF  
D0-DF  
E0-EF  
F0-FF  
5 (or 4)  
5 (or 4)  
7
JMP  
addr  
addr  
addr  
addr  
5
JNC  
JACC  
INDEX  
addr  
addr  
addr  
CALL  
10  
JZ  
5 (or 4)  
5 (or 4)  
14  
JNZ  
5.0  
5.1  
Programming Model  
14-bit Program Counter  
The 14-bit Program Counter (PC) allows access to up to 8 KB of PROM available with the CY7C65113C architecture. The top  
32 bytes of the ROM in the 8K part are reserved for testing purposes. The program counter is cleared during reset, such that the  
first instruction executed after a reset is at address 0x0000h. Typically, this is a jump instruction to a reset handler that initializes  
The lower eight bits of the program counter are incremented as instructions are loaded and executed. The upper six bits of the  
program counter are incremented by executing an XPAGE instruction. As a result, the last instruction executed within a 256-byte  
“page” of sequential code should be an XPAGE instruction. The assembler directive “XPAGEON” causes the assembler to insert  
XPAGE instructions automatically. Because instructions can be either one or two bytes long, the assembler may occasionally  
need to insert a NOP followed by an XPAGE to execute correctly.  
The address of the next instruction to be executed, the carry flag, and the zero flag are saved as two bytes on the program stack  
during an interrupt acknowledge or a CALL instruction. The program counter, carry flag, and zero flag are restored from the  
program stack during a RETI instruction. Only the program counter is restored during a RET instruction.  
The program counter cannot be accessed directly by the firmware. The program stack can be examined by reading SRAM from  
location 0x00 and up.  
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CY7C65113C  
5.1.1  
Program Memory Organization  
after reset  
14-bit PC  
Address  
0x0000  
Program execution begins here after a reset  
0x0002  
0x0004  
0x0006  
0x0008  
0x000A  
0x000C  
0x000E  
0x0010  
0x0012  
0x0014  
0x0016  
0x0018  
0x001A  
USB Bus Reset interrupt vector  
128-µs timer interrupt vector  
1.024-ms timer interrupt vector  
USB address A endpoint 0 interrupt vector  
USB address A endpoint 1 interrupt vector  
USB address A endpoint 2 interrupt vector  
USB address B endpoint 0 interrupt vector  
USB address B endpoint 1 interrupt vector  
Hub interrupt vector  
Reserved  
GPIO interrupt vector  
2
I C interrupt vector  
Program Memory begins here  
0x1FDF  
(8 KB -32) PROM ends here (CY7C65113C)  
Figure 5-1. Program Memory Space with Interrupt Vector Table  
Note that the upper 32 bytes of the 8K PROM are reserved. Therefore, user’s program must not overwrite this space.  
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CY7C65113C  
5.2  
8-bit Accumulator (A)  
The accumulator is the general-purpose register for the microcontroller.  
5.3  
8-bit Temporary Register (X)  
The “X” register is available to the firmware for temporary storage of intermediate results. The microcontroller can perform indexed  
operations based on the value in X. Refer to Section 5.6.3 for additional information.  
5.4  
8-bit Program Stack Pointer (PSP)  
During a reset, the Program Stack Pointer (PSP) is set to 0x00 and “grows” upward from this address. The PSP may be set by  
firmware, using the MOV PSP,A instruction. The PSP supports interrupt service under hardware control and CALL, RET, and  
RETI instructions under firmware control. The PSP is not readable by the firmware.  
During an interrupt acknowledge, interrupts are disabled and the 14-bit program counter, carry flag, and zero flag are written as  
two bytes of data memory. The first byte is stored in the memory addressed by the PSP, then the PSP is incremented. The second  
byte is stored in memory addressed by the PSP, and the PSP is incremented again. The overall effect is to store the program  
counter and flags on the program “stack” and increment the PSP by two.  
The Return From Interrupt (RETI) instruction decrements the PSP, then restores the second byte from memory addressed by the  
PSP. The PSP is decremented again and the first byte is restored from memory addressed by the PSP. After the program counter  
and flags have been restored from stack, the interrupts are enabled. The overall effect is to restore the program counter and flags  
from the program stack, decrement the PSP by two, and re-enable interrupts.  
The Call Subroutine (CALL) instruction stores the program counter and flags on the program stack and increments the PSP by  
two.  
The Return From Subroutine (RET) instruction restores the program counter but not the flags from the program stack and  
decrements the PSP by two.  
5.4.1  
Data Memory Organization  
The CY7C65113C microcontrollers provide 256 bytes of data RAM. Normally, the SRAM is partitioned into four areas: program  
stack, user variables, data stack, and USB endpoint FIFOs. The following is one example of where the program stack, data stack,  
and user variables areas could be located.  
After reset  
8-bit DSP 8-bit PSP  
Address  
0x00  
Program Stack Growth  
(Move DSP  
)
user selected  
Data Stack Growth  
8-bit DSP  
User variables  
[2]  
USB FIFO space for up to two Addresses and five endpoints  
0xFF  
Notes:  
1. Refer to Section 5.5 for a description of DSP.  
2. Endpoint sizes are fixed by the Endpoint Size Bit (I/O register 0x1F, Bit 7). See Table 17-1.  
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CY7C65113C  
5.5  
8-bit Data Stack Pointer (DSP)  
The Data Stack Pointer (DSP) supports PUSH and POP instructions that use the data stack for temporary storage. A PUSH  
instruction pre-decrements the DSP, then writes data to the memory location addressed by the DSP. A POP instruction reads  
data from the memory location addressed by the DSP, then post-increments the DSP.  
During a reset, the DSP is reset to 0x00. A PUSH instruction when DSP equals 0x00 writes data at the top of the data RAM  
(address 0xFF). This writes data to the memory area reserved for USB endpoint FIFOs. Therefore, the DSP should be indexed  
at an appropriate memory location that does not compromise the Program Stack, user-defined memory (variables), or the USB  
endpoint FIFOs.  
For USB applications, the firmware should set the DSP to an appropriate location to avoid a memory conflict with RAM dedicated  
to USB FIFOs. The memory requirements for the USB endpoints are described in Section 17.2. Example assembly instructions  
to do this with two device addresses (FIFOs begin at 0xD8) are shown below:  
MOV A,20h  
; Move 20 hex into Accumulator (must be D8h or less)  
SWAP A,DSP ; swap accumulator value into DSP register.  
5.6  
Address Modes  
The CY7C65113 microcontrollers support three addressing modes for instructions that require data operands: data, direct, and  
indexed.  
5.6.1  
Data (Immediate)  
“Data” address mode refers to a data operand that is actually a constant encoded in the instruction. As an example, consider the  
instruction that loads A with the constant 0xD8:  
• MOV A, 0D8h.  
This instruction requires two bytes of code where the first byte identifies the “MOV A” instruction with a data operand as the  
second byte. The second byte of the instruction is the constant “0xD8.” A constant may be referred to by name if a prior “EQU”  
statement assigns the constant value to the name. For example, the following code is equivalent to the example shown above:  
• DSPINIT: EQU 0D8h  
• MOV A, DSPINIT.  
5.6.2  
Direct  
“Direct” address mode is used when the data operand is a variable stored in SRAM. In that case, the one byte address of the  
variable is encoded in the instruction. As an example, consider an instruction that loads A with the contents of memory address  
location 0x10:  
• MOV A, [10h].  
Normally, variable names are assigned to variable addresses using “EQU” statements to improve the readability of the assembler  
source code. As an example, the following code is equivalent to the example shown above:  
• buttons: EQU 10h  
• MOV A, [buttons].  
5.6.3  
Indexed  
“Indexed” address mode allows the firmware to manipulate arrays of data stored in SRAM. The address of the data operand is  
the sum of a constant encoded in the instruction and the contents of the “X” register. Normally, the constant is the “base” address  
of an array of data and the X register contains an index that indicates which element of the array is actually addressed:  
• array: EQU 10h  
• MOV X, 3  
• MOV A, [X+array].  
This would have the effect of loading A with the fourth element of the SRAM “array” that begins at address 0x10. The fourth  
element would be at address 0x13.  
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CY7C65113C  
6.0  
Clocking  
XTALOUT  
(pin 1)  
XTALIN  
(pin 2)  
To Internal PLL  
30 pF  
30 pF  
Figure 6-1. Clock Oscillator On-Chip Circuit  
The XTALIN and XTALOUT are the clock pins to the microcontroller. The user can connect an external oscillator or a crystal to  
these pins. When using an external crystal, keep PCB traces between the chip leads and crystal as short as possible (less than  
2 cm). A 6-MHz fundamental frequency parallel resonant crystal can be connected to these pins to provide a reference frequency  
for the internal PLL. The two internal 30-pF load caps appear in series to the external crystal and would be equivalent to a 15-pF  
load. Therefore, the crystal must have a required load capacitance of about 15–18 pF. A ceramic resonator does not allow the  
microcontroller to meet the timing specifications of full speed USB and therefore a ceramic resonator is not recommended with  
these parts.  
An external 6-MHz clock can be applied to the XTALIN pin if the XTALOUT pin is left open. Grounding the XTALOUT pin when  
driving XTALIN with an oscillator does not work because the internal clock is effectively shorted to ground.  
7.0  
Reset  
The CY7C65113C supports two resets: POR and WDR. Each of these resets causes:  
• all registers to be restored to their default states  
• the USB device addresses to be set to 0  
• all interrupts to be disabled  
• the PSP and DSP to be set to memory address 0x00.  
The occurrence of a reset is recorded in the Processor Status and Control Register, as described in Section. Bits 4 and 6 are  
used to record the occurrence of POR and WDR respectively. Firmware can interrogate these bits to determine the cause of a  
reset.  
Program execution starts at ROM address 0x0000 after a reset. Although this looks like interrupt vector 0, there is an important  
difference. Reset processing does NOT push the program counter, carry flag, and zero flag onto program stack. The firmware  
reset handler should configure the hardware before the “main” loop of code. Attempting to execute a RET or RETI in the firmware  
reset handler causes unpredictable execution results.  
7.1  
Power-on Reset  
When V is first applied to the chip, the POR signal is asserted and the CY7C65113C enters a “semi-suspend” state. During  
CC  
the semi-suspend state, which is different from the suspend state defined in the USB specification, the oscillator and all other  
blocks of the part are functional, except for the CPU. This semi-suspend time ensures that both a valid V level is reached and  
CC  
that the internal PLL has time to stabilize before full operation begins. When the V has risen above approximately 2.5V, and  
CC  
the oscillator is stable, the POR is deasserted and the on-chip timer starts counting. The first 1 ms of suspend time is not  
interruptible, and the semi-suspend state continues for an additional 95 ms unless the count is bypassed by a USB Bus Reset  
on the upstream port. The 95 ms provides time for V to stabilize at a valid operating voltage before the chip executes code.  
CC  
If a USB Bus Reset occurs on the upstream port during the 95 ms semi-suspend time, the semi-suspend state is aborted and  
program execution begins immediately from address 0x0000. In this case, the Bus Reset interrupt is pending but not serviced  
until firmware sets the USB Bus Reset Interrupt Enable bit (Bit 0, Figure 14-1) and enables interrupts with the EI command.  
The POR signal is asserted whenever V drops below approximately 2.5V, and remains asserted until V rises above this level  
CC  
CC  
again. Behavior is the same as described above.  
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CY7C65113C  
7.2  
The WDR occurs when the internal Watchdog Timer rolls over. Writing any value to the write-only Watchdog Reset Clear Register  
(Figure 7-1) clears the timer. The timer rolls over and WDR occurs if it is not cleared within t of the last clear (see Section  
Watchdog Reset  
WATCH  
23.0 for the value of t  
). Bit 6 of the Processor Status and Control Register (Figure 13-1) is set to record this event (the  
WATCH  
register contents are set to 010X0001 by the WDR). A Watchdog Timer Reset lasts for 2 ms, after which the microcontroller begins  
execution at ROM address 0x0000.  
2 ms  
t
WATCH  
Last write to  
Watchdog Timer  
Register  
No write to WDT  
register, so WDR  
goes HIGH  
Execution begins at  
Reset Vector 0x0000  
Figure 7-1. Watchdog Reset (Address 0x26)  
The USB transmitter is disabled by a Watchdog Reset because the USB Device Address Registers are cleared (see Section  
17.1). Otherwise, the USB Controller would respond to all address 0 transactions.  
It is possible for the WDR bit of the Processor Status and Control Register (Figure 13-1) to be set following a POR event. If a  
firmware interrogates the Processor Status and Control Register for a set condition on the WDR bit, the WDR bit should be ignored  
if the POR bit is set (Bit 3 of the Processor Status and Control Register).  
8.0  
Suspend Mode  
The CY7C65113C can be placed into a low-power state by setting the Suspend bit of the Processor Status and Control register.  
All logic blocks in the device are turned off except the GPIO interrupt logic and the USB receiver. The clock oscillator and PLL,  
as well as the free-running and Watchdog timers, are shut down. Only the occurrence of an enabled GPIO interrupt or non-idle  
bus activity at a USB upstream or downstream port wakes the part out of suspend. The Run bit in the Processor Status and  
Control Register must be set to resume a part out of suspend.  
The clock oscillator restarts immediately after exiting suspend mode. The microcontroller returns to a fully functional state 1 ms  
after the oscillator is stable. The microcontroller executes the instruction following the I/O write that placed the device into suspend  
mode before servicing any interrupt requests.  
The GPIO interrupt allows the controller to wake-up periodically and poll system components while maintaining a very low average  
power consumption. To achieve the lowest possible current during suspend mode, all I/O should be held at V or Gnd. Note:  
CC  
This also applies to internal port pins that may not be bonded in a particular package.  
Typical code for entering suspend is shown below:  
...  
...  
; All GPIO set to low-power state (no floating pins)  
; Enable GPIO interrupts if desired for wake-up  
; Set suspend and run bits  
; Write to Status and Control Register – Enter suspend, wait for USB activity (or GPIO Interrupt)  
; This executes before any ISR  
mov a, 09h  
iowr FFh  
nop  
...  
; Remaining code for exiting suspend routine.  
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CY7C65113C  
9.0  
General-purpose I/O Ports  
V
CC  
GPIO  
CFG  
mode  
2-bits  
OE  
Q2  
Q1  
Data  
Out  
Latch  
Internal  
Data Bus  
14 kΩ  
GPIO  
PIN  
Port Write  
Port Read  
Q3*  
Data  
In  
Latch  
Reg_Bit  
STRB  
(Latch is Transparent)  
Data  
Interrupt  
Latch  
Interrupt  
Enable  
Interrupt  
Controller  
*Port 0,1: Low I  
sink  
Figure 9-1. Block Diagram of a GPIO Pin  
There are 11 GPIO pins (P0[7:0] and P1[2:0]) for the hardware interface. Each port can be configured as inputs with internal  
pull-ups, open drain outputs, or traditional CMOS outputs. The data for each GPIO port is accessible through the data registers.  
Port data registers are shown in Figure 9-2 through Figure 9-3, and are set to 1 on reset.  
.
Port 0 Data  
Address 0x00  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
P0.7  
R/W  
1
P0.6  
R/W  
1
P0.5  
R/W  
1
P0.4  
R/W  
1
P0.3  
R/W  
1
P0.2  
R/W  
1
P0.1  
R/W  
1
P0.0  
R/W  
1
Figure 9-2. Port 0 Data  
Port 1 Data  
Bit #  
Address 0x01  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2
1
0
Bit Name  
Read/Write  
Reset  
P1.2  
R/W  
1
P1.1  
R/W  
1
P1.0  
R/W  
1
Figure 9-3. Port1 Data  
Special care should be taken with any unused GPIO data bits. An unused GPIO data bit, either a pin on the chip or a port bit that  
is not bonded on a particular package, must not be left floating when the device enters the suspend state. If a GPIO data bit is  
left floating, the leakage current caused by the floating bit may violate the suspend current limitation specified by the USB  
Specifications. If a ‘1’ is written to the unused data bit and the port is configured with open drain outputs, the unused data bit  
remains in an indeterminate state. Therefore, if an unused port bit is programmed in open-drain mode, it must be written with a ‘0.’  
A read from a GPIO port always returns the present state of the voltage at the pin, independent of the settings in the Port Data  
Registers. During reset, all of the GPIO pins are set to a high-impedance input state. Writing a ‘0’ to a GPIO pin drives the pin  
LOW. In this state, a ‘0’ is always read on that GPIO pin unless an external source overdrives the internal pull-down device.  
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CY7C65113C  
9.1  
GPIO Configuration Port  
Every GPIO port can be programmed as inputs with internal pull-ups, outputs LOW or HIGH, or Hi-Z (floating, the pin is not driven  
internally). In addition, the interrupt polarity for each port can be programmed. The Port Configuration bits (Figure 9-4) and the  
Interrupt Enable bit (Figure 9-5 through Figure 9-6) determine the interrupt polarity of the port pins  
.
GPIO Configuration  
Address 0x08  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
Reserved  
Port 1  
Port 1  
Port 0  
Port 0  
Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0  
Read/Write  
Reset  
-
-
-
-
-
-
-
-
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 9-4. GPIO Configuration Register  
As shown in Table 9-1 below, a positive polarity on an input pin represents a rising edge interrupt (LOW to HIGH), and a negative  
polarity on an input pin represents a falling edge interrupt (HIGH to LOW).  
The GPIO interrupt is generated when all of the following conditions are met: the Interrupt Enable bit of the associated Port  
Interrupt Enable Register is enabled, the GPIO Interrupt Enable bit of the Global Interrupt Enable Register (Figure 14-1) is  
enabled, the Interrupt Enable Sense (bit 2, Figure 13-1) is set, and the GPIO pin of the port sees an event matching the interrupt  
polarity.  
The driving state of each GPIO pin is determined by the value written to the pin’s Data Register (Figure 9-2 through Figure 9-3)  
and by its associated Port Configuration bits as shown in the GPIO Configuration Register (Figure 9-4). These ports are  
configured on a per-port basis, so all pins in a given port are configured together. The possible port configurations are detailed  
in Table 9-1. As shown in this table below, when a GPIO port is configured with CMOS outputs, interrupts from that port are  
disabled.  
During reset, all of the bits in the GPIO Configuration Register are written with ‘0’ to select Hi-Z mode for all GPIO ports as the  
default configuration.  
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CY7C65113C  
Table 9-1. GPIO Port Output Control Truth Table and Interrupt Polarity  
Port Config Bit 1 Port Config Bit 0 Data Register Output Drive Strength Interrupt Enable Bit  
Interrupt Polarity  
Disabled  
1
1
0
0
1
0
1
0
0
1
0
1
0
1
0
1
Output LOW  
Resistive  
0
1
0
1
0
1
0
1
– (Falling Edge)  
Disabled  
Output LOW  
Output HIGH  
Output LOW  
Hi-Z  
Disabled  
Disabled  
– (Falling Edge)  
Disabled  
Output LOW  
Hi-Z  
+ (Rising Edge)  
Q1, Q2, and Q3 discussed below are the transistors referenced in Figure 9-1. The available GPIO drive strength are:  
• Output LOW Mode: The pin’s Data Register is set to ‘0.’  
Writing ‘0’ to the pin’s Data Register puts the pin in output LOW mode, regardless of the contents of the Port Configuration  
Bits[1:0]. In this mode, Q1 and Q2 are OFF. Q3 is ON. The GPIO pin is driven LOW through Q3.  
Output HIGH Mode: The pin’s Data Register is set to 1 and the Port Configuration Bits[1:0] is set to ‘10.’  
In this mode, Q1 and Q3 are OFF. Q2 is ON. The GPIO is pulled up through Q2. The GPIO pin is capable of sourcing... of  
current.  
Resistive Mode: The pin’s Data Register is set to 1 and the Port Configuration Bits[1:0] is set to ‘11.’  
Q2 and Q3 are OFF. Q1 is ON. The GPIO pin is pulled up with an internal 14kresistor. In resistive mode, the pin may serve  
as an input. Reading the pin’s Data Register returns a logic HIGH if the pin is not driven LOW by an external source.  
Hi-Z Mode: The pin’s Data Register is set to1 and Port Configuration Bits[1:0] is set either ‘00’ or ‘01.’  
Q1, Q2, and Q3 are all OFF. The GPIO pin is not driven internally. In this mode, the pin may serve as an input. Reading the  
Port Data Register returns the actual logic value on the port pins.  
9.2  
GPIO Interrupt Enable Ports  
Each GPIO pin can be individually enabled or disabled as an interrupt source. The Port 0–1 Interrupt Enable Registers provide  
this feature with an Interrupt Enable bit for each GPIO pin.  
During a reset, GPIO interrupts are disabled by clearing all of the GPIO Interrupt Enable bits. Writing a ‘1’ to a GPIO Interrupt  
Enable bit enables GPIO interrupts from the corresponding input pin. All GPIO pins share a common interrupt, as discussed in  
.
Port 0 Interrupt Enable  
Address 0x04  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
P0.7 Intr  
Enable  
P0.6 Intr  
Enable  
P0.5 Intr  
Enable  
P0.4 Intr  
Enable  
P0.3 Intr  
Enable  
P0.2 Intr  
Enable  
P0.1 Intr  
Enable  
P0.0 Intr  
Enable  
Read/Write  
Reset  
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Figure 9-5. Port 0 Interrupt Enable  
Port 1 Interrupt Enable  
Address 0x05  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
P0.2 Intr  
Enable  
P1.1 Intr  
Enable  
P1.0 Intr  
Enable  
Read/Write  
Reset  
-
-
-
-
-
-
-
-
-
-
W
0
W
0
W
0
Figure 9-6. Port 1 Interrupt Enable  
10.0  
12-bit Free-Running Timer  
The 12-bit timer operates with a 1-µs tick, provides two interrupts (128 µs and 1.024 ms) and allows the firmware to directly time  
events that are up to 4 ms in duration. The lower eight bits of the timer can be read directly by the firmware. Reading the lower  
eight bits latches the upper four bits into a temporary register. When the firmware reads the upper four bits of the timer, it is actually  
reading the count stored in the temporary register. The effect of this is to ensure a stable 12-bit timer value can be read, even  
when the two reads are separated in time.  
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CY7C65113C  
Timer LSB  
Bit #  
Address 0x24  
7
6
5
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
Timer Bit 7  
TimerBit 6  
Timer Bit 5 Timer Bit 4 Timer Bit 3 Timer Bit 2 Timer Bit 1 Timer Bit 0  
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 10-1. Timer LSB Register  
Bit [7:0]: Timer lower eight bits.  
Timer MSB  
Address 0x25  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
Reserved  
Reserved  
Reserved  
Reserved Timer Bit 11 Timer Bit 10 Timer Bit 9 Timer Bit 8  
0
0
0
0
R
0
R
0
R
0
R
0
Figure 10-2. Timer MSB Register  
Bit [3:0]: Timer higher nibble  
Bit [7:4]: Reserved.  
1.024-ms interrupt  
128-µs interrupt  
1 MHz clock  
11 10 9  
8
7
6
5
4
3
2
1
0
L3 L2 L1 L0  
D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0  
To Timer Registers  
8
Figure 10-3. Timer Block Diagram  
11.0  
I2C Configuration Register  
2
2
Internal hardware supports communication with external devices through an I C-compatible interface. I C-compatible function is  
2
2
discussed in detail in Section 12.0. The I C Position bit (Bit 7, Figure 11-1) and I C Port Width bit (Bit 1, Figure 11-1) select the  
locations of the SCL (clock) and SDA (data) pins on Port 1 as shown in Table 11-1. These bits are cleared on reset. When the  
GPIO is configured for I C function, the internal pull ups on the pins are disabled. Addition of an external weak pull-up resistors  
2
on SCL and SDA is recommended.  
.
2
I C Configuration  
Address 0x09  
0
Bit #  
7
6
5
4
3
2
1
2
2
Bit Name  
I C Position Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
I C Port  
Width  
Reserved  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
2
Figure 11-1. I C Configuration Register  
2
Table 11-1. I C Port Configuration  
2
2
2
I C Position (Bit7, Figure 11-1)  
I C Port Width (Bit1, Figure 11-1)  
I C Position  
2
0
0
I C on P1[1:0], 0:SCL, 1:SDA  
Note:  
2
3. I C-compatible function must be separately enabled, as described in Section 12.0.  
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CY7C65113C  
12.0  
I2C-compatible Controller  
The I2C-compatible block provides a versatile two-wire communication with external devices, supporting master, slave, and  
multi-master modes of operation. The I2C-compatible block functions by handling the low-level signaling in hardware, and issuing  
interrupts as needed to allow firmware to take appropriate action during transactions. While waiting for firmware response, the  
hardware keeps the I2C-compatible bus idle if necessary.  
The I2C-compatible block generates an interrupt to the microcontroller at the end of each received or transmitted byte, when a  
stop bit is detected by the slave when in receive mode, or when arbitration is lost. Details of the interrupt responses are given in  
2
2
The I2C-compatible interface consists of two registers, an I C Data Register (Figure 12-1) and an I C Status and Control Register  
2
2
(Figure 12-2). The I C Data Register is implemented as separate read and write registers. Generally, the I C Status and Control  
Register should only be monitored after the I C interrupt, as all bits are valid at that time. Polling this register at other times could  
2
read misleading bit status if a transaction is underway.  
2
2
The I C clock (SCL) is connected to bit 0 of GPIO port 1, and the I C SDA data is connected to bit 1 GPIO port 1. The port  
2
2
selection is determined by settings in the I C Port Configuration Register (Section 11.0). Once the I C-compatible functionality is  
enabled by setting the I C Enable bit of the I C Status and Control Register (bit 0, Figure 12-2), the two LSB ([1:0]) of the  
2
2
corresponding GPIO port is placed in Open Drain mode, regardless of the settings of the GPIO Configuration Register. In Open  
Drain mode, the GPIO pin outputs LOW if the pin’s Data Register is ‘0’, and the pin is in Hi-Z mode if the pin’s Data Register is  
2
‘1’. The electrical characteristics of the I C-compatible interface is the same as that of GPIO port 1. Note that the I (max) is 2  
OL  
mA @ V = 2.0V for port 1.  
OL  
2
2
All control of the I C clock (SCL) and data (SDA) lines is performed by the I C-compatible block.  
I2C Data  
Address 0x29  
Bit #  
7
6
5
4
3
2
1
0
2
2
2
2
2
2
2
2
Bit Name  
Read/Write  
Reset  
I C Data 7  
I C Data 6  
I C Data 5  
I C Data 4  
R/W  
I C Data 3  
I C Data 2  
I C Data 1  
I C Data 0  
R/W  
X
R/W  
X
R/W  
X
R/W  
X
R/W  
X
R/W  
X
R/W  
X
X
2
Figure 12-1. I C Data Register  
2
Bits [7..0]: I C Data  
2
Contains the 8-bit data on the I C Bus.  
2
I C Status and Control  
Address 0x28  
Bit #  
7
6
5
4
3
2
1
0
2
Bit Name  
MSTR Mode Continue/Bu Xmit Mode  
sy  
ACK  
Addr  
ARB  
Lost/Restart  
Received  
Stop  
I C Enable  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
2
Figure 12-2. I C Status and Control Register  
2
The I C Status and Control register bits are defined in Table 12-1, with a more detailed description following.  
2
Table 12-1. I C Status and Control Register Bit Definitions  
Bit  
Name  
Description  
2
2
2
0
I C Enable  
When set to ‘1’, the I C-compatible function is enabled. When cleared, I C GPIO pins operate  
normally.  
2
1
2
3
4
5
Received Stop  
Reads 1 only in slave receive mode, when I C Stop bit detected (unless firmware did not ACK the  
last transaction).  
ARB Lost/Restart Reads 1 to indicate master has lost arbitration. Reads 0 otherwise.  
Write to 1 in master mode to perform a restart sequence (also set Continue bit).  
Addr  
Reads 1 during first byte after start/restart in slave mode, or if master loses arbitration.  
Reads 0 otherwise. This bit should always be written as 0.  
ACK  
In receive mode, write 1 to generate ACK, 0 for no ACK.  
In transmit mode, reads 1 if ACK was received, 0 if no ACK received.  
Xmit Mode  
Write to 1 for transmit mode, 0 for receive mode.  
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CY7C65113C  
2
Table 12-1. I C Status and Control Register Bit Definitions (continued)  
Bit  
Name  
Description  
Write 1 to indicate ready for next transaction.  
Reads 1 when I C-compatible block is busy with a transaction, 0 when transaction is complete.  
6
Continue/Busy  
2
7
MSTR Mode  
Write to 1 for master mode, 0 for slave mode. This bit is cleared if master loses arbitration.  
Clearing from 1 to 0 generates Stop bit.  
Bit 7 : MSTR Mode  
2
Setting this bit to 1 causes the I C-compatible block to initiate a master mode transaction by sending a start bit and  
transmitting the first data byte from the data register (this typically holds the target address and R/W bit). Subsequent bytes  
are initiated by setting the Continue bit, as described below.  
Clearing this bit (set to 0) causes the GPIO pins to operate normally.  
2
In master mode, the I C-compatible block generates the clock (SCK), and drives the data line as required depending on  
2
transmit or receive state. The I C-compatible block performs any required arbitration and clock synchronization. IN the  
event of a loss of arbitration, this MSTR bit is cleared, the ARB Lost bit is set, and an interrupt is generated by the  
microcontroller. If the chip is the target of an external master that wins arbitration, then the interrupt is held off until the  
transaction from the external master is completed.  
2
When MSTR Mode is cleared from 1 to 0 by a firmware write, an I C Stop bit is generated.  
Bit 6 : Continue/Busy  
This bit is written by the firmware to indicate that the firmware is ready for the next byte transaction to begin. In other words,  
the bit has responded to an interrupt request and has completed the required update or read of the data register. During a  
2
read this bit indicates if the hardware is busy and is locking out additional writes to the I C Status and Control register. This  
2
locking allows the hardware to complete certain operations that may require an extended period of time. Following an I C  
2
interrupt, the I C-compatible block does not return to the Busy state until firmware sets the Continue bit. This allows the  
firmware to make one control register write without the need to check the Busy bit.  
Bit 5 : Xmit Mode  
This bit is set by firmware to enter transmit mode and perform a data transmit in master or slave mode. Clearing this bit  
2
sets the part in receive mode. Firmware generally determines the value of this bit from the R/W bit associated with the I C  
address packet. The Xmit Mode bit state is ignored when initially writing the MSTR Mode or the Restart bits, as these cases  
always cause transmit mode for the first byte.  
Bit 4 : ACK  
This bit is set or cleared by firmware during receive operation to indicate if the hardware should generate an ACK signal  
2
on the I C-compatible bus. Writing a 1 to this bit generates an ACK (SDA LOW) on the I2C-compatible bus at the ACK bit  
time. During transmits (Xmit Mode = 1), this bit should be cleared.  
Bit 3 : Addr  
2
2
This bit is set by the I C-compatible block during the first byte of a slave receive transaction, after an I C start or restart.  
The Addr bit is cleared when the firmware sets the Continue bit. This bit allows the firmware to recognize when the master  
has lost arbitration, and in slave mode it allows the firmware to recognize that a start or restart has occurred.  
Bit 2 : ARB Lost/Restart  
This bit is valid as a status bit (ARB Lost) after master mode transactions. In master mode, set this bit (along with the  
2
2
Continue and MSTR Mode bits) to perform an I C restart sequence. The I C target address for the restart must be written  
to the data register before setting the Continue bit. To prevent false ARB Lost signals, the Restart bit is cleared by hardware  
during the restart sequence.  
Bit 1 : Receive Stop  
This bit is set when the slave is in receive mode and detects a stop bit on the bus. The Receive Stop bit is not set if the  
2
2
firmware terminates the I C transaction by not acknowledging the previous byte transmitted on the I C-compatible bus,  
e.g., in receive mode if firmware sets the Continue bit and clears the ACK bit.  
2
Bit 0 : I C Enable  
2
2
Set this bit to override GPIO definition with I C-compatible function on the two I C-compatible pins. When this bit is cleared,  
2
these pins are free to function as GPIOs. In I C-compatible mode, the two pins operate in open drain mode, independent  
of the GPIO configuration setting.  
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CY7C65113C  
13.0  
Processor Status and Control Register  
Processor Status and Control  
Address 0xFF  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
IRQ  
Pending  
Watchdog  
Reset  
USB Bus  
Reset  
Interrupt  
Power-on  
Reset  
Suspend  
Interrupt  
Enable  
Sense  
Reserved  
Run  
Read/Write  
Reset  
R
0
R/W  
0
R/W  
0
R/W  
1
R/W  
0
R
0
R/W  
0
R/W  
1
Figure 13-1. Processor Status and Control Register  
Bit 0: Run  
This bit is manipulated by the HALT instruction. When Halt is executed, all the bits of the Processor Status and Control  
Register are cleared to 0. Since the run bit is cleared, the processor stops at the end of the current instruction. The processor  
remains halted until an appropriate reset occurs (power-on or Watchdog). This bit should normally be written as a ‘1.’  
Bit 1: Reserved  
Bit 1 is reserved and must be written as a zero.  
Bit 2: Interrupt Enable Sense  
This bit indicates whether interrupts are enabled or disabled. Firmware has no direct control over this bit as writing a zero  
or one to this bit position has no effect on interrupts. A ‘0’ indicates that interrupts are masked off and a ‘1’ indicates that  
the interrupts are enabled. This bit is further gated with the bit settings of the Global Interrupt Enable Register (Figure 14-1)  
and USB End Point Interrupt Enable Register (Figure 14-2). Instructions DI, EI, and RETI manipulate the state of this bit.  
Bit 3: Suspend  
Writing a ‘1’ to the Suspend bit halts the processor and cause the microcontroller to enter the suspend mode that signifi-  
cantly reduces power consumption. A pending, enabled interrupt or USB bus activity causes the device to come out of  
suspend. After coming out of suspend, the device resumes firmware execution at the instruction following the IOWR which  
put the part into suspend. An IOWR attempting to put the part into suspend is ignored if USB bus activity is present. See  
Section 8.0 for more details on suspend mode operation.  
Bit 4: Power-on Reset  
The Power-on Reset is set to ‘1’ during a power-on reset. The firmware can check bits 4 and 6 in the reset handler to  
determine whether a reset was caused by a power-on condition or a Watchdog timeout. A POR event may be followed by  
a Watchdog reset before firmware begins executing, as explained below.  
Bit 5: USB Bus Reset Interrupt  
The USB Bus Reset Interrupt bit is set when the USB Bus Reset is detected on receiving a USB Bus Reset signal on the  
upstream port. The USB Bus Reset signal is a single-ended zero (SE0) that lasts from 12 to 16 µs. An SE0 is defined as  
the condition in which both the D+ line and the D– line are LOW at the same time.  
Bit 6: Watchdog Reset  
The Watchdog Reset is set during a reset initiated by the Watchdog Timer. This indicates the Watchdog Timer went for  
more than t  
(8 ms minimum) between Watchdog clears. This can occur with a POR event, as noted below.  
WATCH  
Bit 7: IRQ Pending  
The IRQ pending, when set, indicates that one or more of the interrupts has been recognized as active. An interrupt remains  
pending until its interrupt enable bit is set (Figure 14-1, Figure 14-2) and interrupts are globally enabled. At that point, the  
internal interrupt handling sequence clears this bit until another interrupt is detected as pending.  
During power-up, the Processor Status and Control Register is set to 00010001, which indicates a POR (bit 4 set) has occurred  
and no interrupts are pending (bit 7 clear). During the 96-ms suspend at start-up (explained in Section 7.1), a Watchdog Reset  
also occurs unless this suspend is aborted by an upstream SE0 before 8 ms. If a WDR occurs during the power-up suspend  
interval, firmware reads 01010001 from the Status and Control Register after power-up. Normally, the POR bit should be cleared  
so a subsequent WDR can be clearly identified. If an upstream bus reset is received before firmware examines this register, the  
Bus Reset bit may also be set.  
During a Watchdog Reset, the Processor Status and Control Register is set to 01XX0001, which indicates a Watchdog Reset (bit  
6 set) has occurred and no interrupts are pending (bit 7 clear). The Watchdog Reset does not effect the state of the POR and the  
Bus Reset Interrupt bits.  
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14.0  
Interrupts  
2
Interrupts are generated by GPIO pins, internal timers, I C-compatible operation, internal USB hub and USB traffic conditions.  
All interrupts are maskable by the Global Interrupt Enable Register and the USB End Point Interrupt Enable Register. Writing a  
‘1’ to a bit position enables the interrupt associated with that bit position.  
Global Interrupt Enable Register  
Address 0X20  
Bit #  
7
6
5
4
3
2
1
0
2
Bit Name  
Reserved I C Interrupt  
Enable  
GPIO  
Interrupt  
Enable  
Reserved  
USB Hub  
Interrupt  
Enable  
1.024-ms  
Interrupt  
Enable  
128-µs  
Interrupt  
Enable  
USB Bus  
RST  
Interrupt  
Enable  
Read/Write  
Reset  
R/W  
0
R/W  
0
-
R/W  
0
R/W  
0
R/W  
0
R/W  
0
X
Figure 14-1. Global Interrupt Enable Register  
Bit 0 : USB Bus RST Interrupt Enable  
1 = Enable Interrupt on a USB Bus Reset; 0 = Disable interrupt on a USB Bus Reset (Refer to section 14.3).  
Bit 1 :128-µs Interrupt Enable  
1 = Enable Timer interrupt every 128 µs; 0 = Disable Timer Interrupt for every 128 µs.  
Bit 2 : 1.024-ms Interrupt Enable  
1 = Enable Timer interrupt every 1.024 ms; 0 = Disable Timer Interrupt every 1.024 ms.  
Bit 3 : USB Hub Interrupt Enable  
1 = Enable Interrupt on a Hub status change; 0 = Disable interrupt due to hub status change. (Refer to section 14.6.)  
Bit 4 : Reserved.  
Bit 5 : GPIO Interrupt Enable  
1 = Enable Interrupt on falling/rising edge on any GPIO; 0 = Disable Interrupt on falling/rising edge on any GPIO (Refer to  
2
Bit 6 : I C Interrupt Enable  
1 = Enable Interrupt on I2C related activity; 0 = Disable I2C related activity interrupt. (Refer to section 14.8.)  
Bit 7 : Reserved.  
USB Endpoint Interrupt Enable  
Address 0X21  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
EPB1  
Interrupt  
Enable  
EPB0  
Interrupt  
Enable  
EPA2  
Interrupt  
Enable  
EPA1  
Interrupt  
Enable  
EPA0  
Interrupt  
Enable  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 14-2. USB Endpoint Interrupt Enable Register  
Bit 0: EPA0 Interrupt Enable  
1 = Enable Interrupt on data activity through endpoint A0; 0 = Disable Interrupt on data activity through endpoint A0  
Bit 1: EPA1 Interrupt Enable  
1 = Enable Interrupt on data activity through endpoint A1; 0 = Disable Interrupt on data activity through endpoint A1  
Bit 2: EPA2 Interrupt Enable  
1 = Enable Interrupt on data activity through endpoint A2; 0 = Disable Interrupt on data activity through endpoint A2.  
Bit 3: EPB0 Interrupt Enable  
1 = Enable Interrupt on data activity through endpoint B0; 0 = Disable Interrupt on data activity through endpoint B0  
Bit 4: EPB1 Interrupt Enable  
1 = Enable Interrupt on data activity through endpoint B1; 0 = Disable Interrupt on data activity through endpoint B1  
Bit [7..5] : Reserved  
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During a reset, the contents of the Global Interrupt Enable Register and USB End Point Interrupt Enable Register are cleared,  
effectively disabling all interrupts,  
The interrupt controller contains a separate flip-flop for each interrupt. See Figure 14-3 for the logic block diagram of the interrupt  
controller. When an interrupt is generated, it is first registered as a pending interrupt. It stays pending until it is serviced or a reset  
occurs. A pending interrupt only generates an interrupt request if it is enabled by the corresponding bit in the interrupt enable  
registers. The highest priority interrupt request is serviced following the completion of the currently executing instruction.  
When servicing an interrupt, the hardware does the following:  
1. Disables all interrupts by clearing the Global Interrupt Enable bit in the CPU (the state of this bit can be read at Bit 2 of the  
Processor Status and Control Register, Figure 13-1).  
2. Clears the flip-flop of the current interrupt.  
3. Generates an automatic CALL instruction to the ROM address associated with the interrupt being serviced (i.e., the Interrupt  
Vector, see Section 14.1).  
The instruction in the interrupt table is typically a JMP instruction to the address of the Interrupt Service Routine (ISR). The user  
can reenable interrupts in the interrupt service routine by executing an EI instruction. Interrupts can be nested to a level limited  
only by the available stack space.  
The Program Counter value as well as the Carry and Zero flags (CF, ZF) are stored onto the Program Stack by the automatic  
CALL instruction generated as part of the interrupt acknowledge process. The user firmware is responsible for ensuring that the  
processor state is preserved and restored during an interrupt. The PUSH A instruction should typically be used as the first  
command in the ISR to save the accumulator value and the POP A instruction should be used to restore the accumulator value  
just before the RETI instruction. The program counters CF and ZF are restored and interrupts are enabled when the RETI  
instruction is executed.  
The IDI and EI instruction can be used to disable and enable interrupts, respectively. These instruction affect only the Global  
Interrupt Enable bit of the CPU. If desired, EI can be used to re-enable interrupts while inside an ISR, instead of waiting for the  
RETI that exits the ISR. While the global interrupt enable bit is cleared, the presence of a pending interrupt can be detected by  
examining the IRQ Sense bit (Bit 7 in the Processor Status and Control Register).  
14.1  
Interrupt Vectors  
The Interrupt Vectors supported by the USB Controller are listed in Table 14-1. The lowest-numbered interrupt (USB Bus Reset  
interrupt) has the highest priority, and the highest-numbered interrupt (I C interrupt) has the lowest priority.  
USB Reset Clear  
Interrupt  
Vector  
To CPU  
CLR  
USB Reset IRQ  
128-µs CLR  
128-µs IRQ  
1-ms CLR  
1-ms IRQ  
1
D
Q
Enable [0]  
(Reg 0x20)  
CPU  
USB Reset Int  
IRQ Sense  
IRQ  
CLK  
IRQout  
AddrA EP0 CLR  
AddrA EP0 IRQ  
AddrA EP1 CLR  
AddrA EP1 IRQ  
AddrA EP2 CLR  
AddrA EP2 IRQ  
CLR  
Q
1
D
Global  
Interrupt  
Enable  
Bit  
Int Enable  
Sense  
Enable [2]  
(Reg 0x21)  
AddrB EP0 CLR  
AddrB EP0 IRQ  
AddrA ENP2 Int  
CLK  
AddrB EP1 CLR  
AddrB EP1 IRQ  
Controlled by DI, EI, and  
RETI Instructions  
CLR  
Hub CLR  
Hub IRQ  
Interrupt  
Acknowledge  
DAC CLR  
DAC IRQ  
GPIO CLR  
GPIO IRQ  
I2C CLR  
CLR  
I2C IRQ  
Q
1
Enable [6]  
(Reg 0x20)  
D
Interrupt Priority Encoder  
I2C Int  
CLK  
Figure 14-3. Interrupt Controller Function Diagram  
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Although Reset is not an interrupt, the first instruction executed after a reset is at PROM address 0x0000h—which corresponds  
to the first entry in the Interrupt Vector Table. Because the JMP instruction is two bytes long, the interrupt vectors occupy two bytes.  
Table 14-1. Interrupt Vector Assignments  
Interrupt Vector Number  
ROM Address  
0x0000  
0x0002  
0x0004  
0x0006  
0x0008  
0x000A  
0x000C  
0x000E  
0x0010  
0x0012  
0x0014  
0x0016  
0x0018  
Function  
Execution after Reset begins here  
USB Bus Reset interrupt  
Not Applicable  
1
2
128-µs timer interrupt  
3
1.024-ms timer interrupt  
4
USB Address A Endpoint 0 interrupt  
USB Address A Endpoint 1 interrupt  
USB Address A Endpoint 2 interrupt  
USB Address B Endpoint 0 interrupt  
USB Address B Endpoint 1 interrupt  
USB Hub interrupt  
5
6
7
8
9
10  
11  
12  
DAC interrupt  
GPIO interrupt  
2
I C interrupt  
14.2  
Interrupt Latency  
Interrupt latency can be calculated from the following equation:  
Interrupt latency = (Number of clock cycles remaining in the current instruction) + (10 clock cycles for the CALL instruction) +  
(5 clock cycles for the JMP instruction)  
For example, if a 5-clock cycle instruction such as JC is being executed when an interrupt occurs, the first instruction of the  
Interrupt Service Routine executes a minimum of 16 clocks (1+10+5) or a maximum of 20 clocks (5+10+5) after the interrupt is  
issued. For a 12-MHz internal clock (6-MHz crystal), 20 clock periods is 20/12 MHz = 1.667 µs.  
14.3  
USB Bus Reset Interrupt  
The USB Controller recognizes a USB Reset when a Single Ended Zero (SE0) condition persists on the upstream USB port for  
12–16 µs. SE0 is defined as the condition in which both the D+ line and the D– line are LOW. A USB Bus Reset may be recognized  
for an SE0 as short as 12 µs, but is always recognized for an SE0 longer than 16 µs. When a USB Bus Reset is detected, bit 5  
of the Processor Status and Control Register (Figure 13-1) is set to record this event. In addition, the controller clears the following  
registers:  
SIE Section: .... USB Device Address Registers (0x10, 0x40)  
Hub Section: ......................Hub Ports Connect Status (0x48)  
........................................................Hub Ports Enable (0x49)  
........................................................ Hub Ports Speed (0x4A)  
.................................................... Hub Ports Suspend (0x4D)  
.......................................... Hub Ports Resume Status (0x4E)  
.................................................Hub Ports SE0 Status (0x4F)  
........................................................... Hub Ports Data (0x50)  
.............................................Hub Downstream Force (0x51).  
A USB Bus Reset Interrupt is generated at the end of the USB Bus Reset condition when the SE0 state is deasserted. If the USB  
reset occurs during the start-up delay following a POR, the delay is aborted as described in Section 7.1.  
14.4  
Timer Interrupt  
There are two periodic timer interrupts: the 128-µs interrupt and the 1.024-ms interrupt. The user should disable both timer  
interrupts before going into the suspend mode to avoid possible conflicts between servicing the timer interrupts first or the suspend  
request first.  
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14.5  
USB Endpoint Interrupts  
There are five USB endpoint interrupts, one per endpoint. A USB endpoint interrupt is generated after the USB host writes to a  
USB endpoint FIFO or after the USB controller sends a packet to the USB host. The interrupt is generated on the last packet of  
the transaction (e.g., on the host’s ACK on an IN transfer, or on the device ACK on an OUT transfer). If no ACK is received during  
an IN transaction, no interrupt is generated.  
14.6  
USB Hub Interrupt  
A USB hub interrupt is generated by the hardware after a connect/disconnect change, babble, or a resume event is detected by  
the USB repeater hardware. The babble and resume events are additionally gated by the corresponding bits of the Hub Port  
Enable Register (Figure 16-3). The connect/disconnect event on a port does not generate an interrupt if the SIE does not drive  
the port (i.e., the port is being forced).  
14.7  
GPIO Interrupt  
Each of the GPIO pins can generate an interrupt, if enabled. The interrupt polarity can be programmed for each GPIO port as  
part of the GPIO configuration. All of the GPIO pins share a single interrupt vector, which means the firmware needs to read the  
GPIO ports with enabled interrupts to determine which pin or pins caused an interrupt. A block diagram of the GPIO interrupt  
logic is shown in Figure 14-4.  
.
Port  
Configuration  
GPIO Interrupt  
Flip Flop  
Register  
OR Gate  
(1 input per  
GPIO pin)  
IRQout  
Interrupt  
Priority  
1
D
Q
Interrupt  
Vector  
M
U
X
Encoder  
GPIO  
Pin  
CLR  
Port Interrupt  
Enable Register  
1 = Enable  
0 = Disable  
IRA  
Global  
GPIO Interrupt  
Enable  
1 = Enable  
0 = Disable  
(Bit 5, Register 0x20)  
Figure 14-4. GPIO Interrupt Structure  
Refer to Sections 9.1 and 9.2 for more information of setting GPIO interrupt polarity and enabling individual GPIO interrupts. If  
one port pin has triggered an interrupt, no other port pins can cause a GPIO interrupt until that port pin has returned to its inactive  
(non-trigger) state or its corresponding port interrupt enable bit is cleared. The USB Controller does not assign interrupt priority  
to different port pins and the Port Interrupt Enable Registers are not cleared during the interrupt acknowledge process.  
2
14.8  
I C Interrupt  
2
2
The I C interrupt occurs after various events on the I C-compatible bus to signal the need for firmware interaction. This generally  
2
involves reading the I C Status and Control Register (Figure 12-2) to determine the cause of the interrupt, loading/reading the  
I C Data Register as appropriate, and finally writing the Processor Status and Control Register (Figure 13-1) to initiate the  
subsequent transaction. The interrupt indicates that status bits are stable and it is safe to read and write the I C registers. Refer  
to Section 12.0 for details on the I C registers.  
2
2
2
When enabled, the I C-compatible state machines generate interrupts on completion of the following conditions. The referenced  
2
bits are in the I C Status and Control Register.  
1. In slave receive mode, after the slave receives a byte of data: The Addr bit is set, if this is the first byte since a start or restart  
signal was sent by the external master. Firmware must read or write the data register as necessary, then set the ACK, Xmit  
MODE, and Continue/Busy bits appropriately for the next byte.  
2. In slave receive mode, after a stop bit is detected: The Received Stop bit is set, if the stop bit follows a slave receive transaction  
where the ACK bit was cleared to 0, no stop bit detection occurs.  
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3. In slave transmit mode, after the slave transmits a byte of data: The ACK bit indicates if the master that requested the byte  
acknowledged the byte. If more bytes are to be sent, firmware writes the next byte into the Data Register and then sets the  
Xmit MODE and Continue/Busy bits as required.  
4. In master transmit mode, after the master sends a byte of data. Firmware should load the Data Register if necessary, and  
set the Xmit MODE, MSTR MODE, and Continue/Busy bits appropriately. Clearing the MSTR MODE bit issues a stop signal  
2
to the I C-compatible bus and return to the idle state.  
5. In master receive mode, after the master receives a byte of data: Firmware should read the data and set the ACK and  
Continue/Busy bits appropriately for the next byte. Clearing the MSTR MODE bit at the same time causes the master state  
2
machine to issue a stop signal to the I C-compatible bus and leave the I2C-compatible hardware in the idle state.  
6. When the master loses arbitration: This condition clears the MSTR MODE bit and sets the ARB Lost/Restart bit immediately  
2
and then waits for a stop signal on the I C-compatible bus to generate the interrupt.  
The Continue/Busy bit is cleared by hardware prior to interrupt conditions 1 to 4. Once the Data Register has been read or written,  
firmware should configure the other control bits and set the Continue/Busy bit for subsequent transactions. Following an interrupt  
from master mode, firmware should perform only one write to the Status and Control Register that sets the Continue/Busy bit,  
2
without checking the value of the Continue/Busy bit. The Busy bit may otherwise be active and I C register contents may be  
2
changed by the hardware during the transaction, until the I C interrupt occurs.  
15.0  
USB Overview  
The USB hardware includes a USB Hub repeater with one upstream and up to seven downstream ports. The USB Hub repeater  
interfaces to the microcontroller through a full-speed serial interface engine (SIE). An external series resistor of R must be  
ext  
placed in series with all upstream and downstream USB outputs in order to meet the USB driver requirements of the USB  
specification. The CY7C65113C microcontroller can provide the functionality of a compound device consisting of a USB hub and  
permanently attached functions.  
15.1  
USB Serial Interface Engine (SIE)  
The SIE allows the CY7C65113C microcontroller to communicate with the USB host through the USB repeater portion of the hub.  
The SIE simplifies the interface between the microcontroller and USB by incorporating hardware that handles the following USB  
bus activity independently of the microcontroller:  
• Bit stuffing/unstuffing  
• Checksum generation/checking  
• ACK/NAK/STALL  
Token type identification  
• Address checking.  
Firmware is required to handle the following USB interface tasks:  
• Coordinate enumeration by responding to SETUP packets  
• Fill and empty the FIFOs  
• Suspend/Resume coordination  
• Verify and select DATA toggle values.  
15.2  
USB Enumeration  
The internal hub and any compound device function are enumerated under firmware control. The hub is enumerated first, followed  
by any integrated compound function. After the hub is enumerated, the USB host can read hub connection status to determine  
which (if any) of the downstream ports need to be enumerated. The following is a brief summary of the typical enumeration  
process of the CY7C65113C by the USB host. For a detailed description of the enumeration process, refer to the USB specifi-  
cation.  
In this description, ‘Firmware’ refers to embedded firmware in the CY7C65113C controller.  
1. The host computer sends a SETUP packet followed by a DATA packet to USB address 0 requesting the Device descriptor.  
2. Firmware decodes the request and retrieves its Device descriptor from the program memory tables.  
3. The host computer performs a control read sequence and Firmware responds by sending the Device descriptor over the USB  
bus, via the on-chip FIFOs.  
4. After receiving the descriptor, the host sends a SETUP packet followed by a DATA packet to address 0 assigning a new USB  
address to the device.  
5. Firmware stores the new address in its USB Device Address Register (for example, as Address B) after the no-data control  
sequence completes.  
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6. The host sends a request for the Device descriptor using the new USB address.  
7. Firmware decodes the request and retrieves the Device descriptor from program memory tables.  
8. The host performs a control read sequence and Firmware responds by sending its Device descriptor over the USB bus.  
9. The host generates control reads from the device to request the Configuration and Report descriptors.  
10.Once the device receives a Set Configuration request, its functions may now be used.  
11.Following enumeration as a hub, Firmware can optionally indicate to the host that a compound device exists (for example, the  
keyboard in a keyboard/hub device).  
12.The host carries out the enumeration process with this additional function as though it were attached downstream from the hub.  
13.When the host assigns an address to this device, it is stored as the other USB address (for example, Address A).  
16.0  
USB Hub  
A USB hub is required to support:  
• Connectivity behavior: service connect/disconnect detection  
• Bus fault detection and recovery  
• Full-/Low-speed device support  
These features are mapped onto a hub repeater and a hub controller. The hub controller is supported by the processor integrated  
into the CY7C65113C microcontroller. The hardware in the hub repeater detects whether a USB device is connected to a  
downstream port. The connection to a downstream port is through a differential signal pair (D+ and D–). Each downstream port  
provided by the hub requires external R  
resistors from each signal line to ground, so that when a downstream port has no  
UDN  
device connected, the hub reads a LOW (zero) on both D+ and D–. This condition is used to identify the “no connect” state.  
The hub must have a resistor R connected between its upstream D+ line and V to indicate it is a full speed USB device.  
UUP  
REG  
The hub generates an EOP at EOF1, in accordance with the USB 1.1 Specification (section 11.2.2, page 234) as well as USB  
2.0 specification (section 11.2.5, page 304).  
16.1  
Connecting/Disconnecting a USB Device  
A low-speed (1.5 Mbps) USB device has a pull-up resistor on the D– pin. At connect time, the bias resistors set the signal levels  
on the D+ and D– lines. When a low-speed device is connected to a hub port, the hub sees a LOW on D+ and a HIGH on D–.  
This causes the hub repeater to set a connect bit in the Hub Ports Connect Status register for the downstream port (see  
Figure 16-1). Then the hub repeater generates a Hub Interrupt to notify the microcontroller that there has been a change in the  
Hub downstream status. The firmware sets the speed of this port in the Hub Ports Speed Register (see Figure 16-2).  
A full-speed (12 Mbps) USB device has a pull-up resistor from the D+ pin, so the hub sees a HIGH on D+ and a LOW on D–. In  
this case, the hub repeater sets a connect bit in the Hub Ports Connect Status register and generates a Hub Interrupt to notify  
the microcontroller of the change in Hub status. The firmware sets the speed of this port in the Hub Ports Speed Register (see  
Connects are recorded by the time a non-SE0 state lasts for more than 2.5 µs on a downstream port.  
When a USB device is disconnected from the Hub, the downstream signal pair eventually floats to a single-ended zero state. The  
hub repeater recognizes a disconnect once the SE0 state on a downstream port lasts from 2.0 to 2.5 µs. On a disconnect, the  
corresponding bit in the Hub Ports Connect Status register is cleared, and the Hub Interrupt is generated  
.
Hub Ports Connect Status  
Address 0x48  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
Reserved  
Port 4  
Connect  
Status  
Port 3  
Connect  
Status  
Port 2  
Connect  
Status  
Port 1  
Connect  
Status  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 16-1. Hub Ports Connect Status  
Bit [0..3] : Port x Connect Status (where x = 1..4).  
When set to 1, Port x is connected; When set to 0, Port x is disconnected.  
Bit [4..7] : Reserved.  
Set to 0.  
The Hub Ports Connect Status register is cleared to zero by reset or USB bus reset, then set to match the hardware configuration  
by the hub repeater hardware. The Reserved bits [4..7] should always read as ‘0’ to indicate no connection.  
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Hub Ports Speed  
Address 0x4A  
Bit #  
7
6
Reserved  
R/W  
5
Reserved  
R/W  
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
Reserved  
Reserved Port 4 Speed Port 3 Speed Port 2 Speed Port 1 Speed  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
0
0
Figure 16-2. Hub Ports Speed  
Bit [0..3] : Port x Speed (where x = 1..4).  
Set to 1 if the device plugged in to Port x is Low Speed; Set to 0 if the device plugged in to Port x is Full Speed.  
Bit [4..7] : Reserved.  
Set to 0.  
The Hub Ports Speed register is cleared to zero by reset or bus reset. This must be set by the firmware on issuing a port reset.  
The Reserved bits [4..7] should always read as ‘0.’  
16.2  
Enabling/Disabling a USB Device  
After a USB device connection has been detected, firmware must update status change bits in the hub status change data  
structure that is polled periodically by the USB host. The host responds by sending a packet that instructs the hub to reset and  
enable the downstream port. Firmware then sets the bit in the Hub Ports Enable register (Figure 16-3), for the downstream port.  
The hub repeater hardware responds to an enable bit in the Hub Ports Enable register (Figure 16-3) by enabling the downstream  
port, so that USB traffic can flow to and from that port.  
If a port is marked enabled and is not suspended, it receives all USB traffic from the upstream port, and USB traffic from the  
downstream port is passed to the upstream port (unless babble is detected). Low-speed ports do not receive full-speed traffic  
from the upstream port.  
When firmware writes to the Hub Ports Enable register (Figure 16-3) to enable a port, the port is not enabled until the end of any  
packet currently being transmitted. If there is no USB traffic, the port is enabled immediately.  
When a USB device disconnection has been detected, firmware must update status bits in the hub change status data structure  
that is polled periodically by the USB host. In suspended mode, a connect or disconnect event generates an interrupt (if the hub  
interrupt is enabled) even if the port is disabled.  
Hub Ports Enable Register  
Address 0x49  
Bit #  
7
Reserved  
R/W  
6
Reserved  
R/W  
5
Reserved  
R/W  
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
Reserved Port 4 Enable Port 3 Enable Port 2 Enable Port 1 Enable  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
0
0
0
Figure 16-3. Hub Ports Enable Register  
Bit [0..3] : Port x Enable (where x = 1..4)  
Set to 1 if Port x is enabled; Set to 0 if Port x is disabled  
Bit [4..7] : Reserved.  
Set to 0.  
The Hub Ports Enable register is cleared to zero by reset or bus reset to disable all downstream ports as the default condition.  
A port is also disabled by internal hub hardware (enable bit cleared) if babble is detected on that downstream port. Babble is  
defined as:  
• Any non-idle downstream traffic on an enabled downstream port at EOF2.  
• Any downstream port with upstream connectivity established at EOF2 (i.e., no EOP received by EOF2).  
16.3  
Hub Downstream Ports Status and Control  
Data transfer on hub downstream ports is controlled according to the bit settings of the Hub Downstream Ports Control Register  
(Figure 16-4). Each downstream port is controlled by two bits, as defined in Table 16-1 below. The Hub Downstream Ports Control  
Register is cleared upon reset or bus reset, and the reset state is the state for normal USB traffic. Any downstream port being  
forced must be marked as disabled (Figure 16-3) for proper operation of the hub repeater.  
Firmware should use this register for driving bus reset and resume signaling to downstream ports. Controlling the port pins through  
this register uses standard USB edge rate control according to the speed of the port, set in the Hub Port Speed Register.  
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The downstream USB ports are designed for connection of USB devices, but can also serve as output ports under firmware  
control. This allows unused USB ports to be used for functions such as driving LEDs or providing additional input signals. Pulling  
up these pins to voltages above V  
may cause current flow into the pin.  
REF  
This register is not reset by USB bus reset. These bits must be cleared before going into suspend.  
Hub Downstream Ports Control Register  
Address 0x4B  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Port 4  
Port 4  
Port 3  
Port 3  
Port 2  
Port 2  
Port 1  
Port 1  
Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 16-4. Hub Downstream Ports Control Register  
Table 16-1. Control Bit Definition for Downstream Ports  
Control Bits  
Bit1  
0
Bit 0  
Control Action  
Not Forcing (Normal USB Function)  
Force Differential ‘1’ (D+ HIGH, D– LOW)  
Force Differential ‘0’ (D+ LOW, D– HIGH)  
Force SE0 state  
0
1
0
1
0
1
1
An alternate means of forcing the downstream ports is through the Hub Ports Force Low Register (Figure 16-5) Register. With  
this register the pins of the downstream ports can be individually forced LOW, or left unforced. Unlike the Hub Downstream Ports  
Control Register, above, the Force Low Register does not produce standard USB edge rate control on the forced pins. However,  
this register allows downstream port pins to be held LOW in suspend. This register can be used to drive SE0 on all downstream  
ports when unconfigured, as required in the USB 1.1 specification.  
.
Hub Ports Force Low  
Address 0x51  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Force Low  
D+[4]  
Force Low  
D–[4]  
Force Low  
D+[3]  
Force Low  
D–[3]  
Force Low  
D+[2]  
Force Low  
D–[2]  
Force Low  
D+[1]  
Force Low  
D–[1]  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 16-5. Hub Ports Force Low Register  
The data state of downstream ports can be read through the HUB Ports SE0 Status Register (Figure 16-6) and the Hub Ports  
Data Register (Figure 16-7). The data read from the Hub Ports Data Register is the differential data only and is independent of  
the settings of the Hub Ports Speed Register (Figure 16-2). When the SE0 condition is sensed on a downstream port, the  
corresponding bits of the Hub Ports Data Register hold the last differential data state before the SE0. Hub Ports SE0 Status  
Register and Hub Ports Data Register are cleared upon reset or bus reset  
.
Hub Ports SE0 Status  
Address 0x4F  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
Reserved  
Port 4  
Port 3  
Port 2  
Port 1  
SE0 Status SE0 Status SE0 Status SE0 Status  
Read/Write  
Reset  
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 16-6. Hub Ports SE0 Status Register  
Bit [0..3]: Port x SE0 Status (where x = 1..4).  
Set to 1 if a SE0 is output on the Port x bus; Set to 0 if a Non-SE0 is output on the Port x bus.  
Bit [4..7]: Reserved.  
Set to 0  
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.
Hub Ports Data  
ADDRESS 0x50  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Reserved  
Reserved  
Reserved  
Reserved  
Port 4 Diff.  
Data  
Port 3 Diff.  
Data  
Port 2 Diff.  
Data  
Port 1 Diff.  
Data  
Read/Write  
Reset  
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 16-7. Hub Ports Data Register  
Bit [0..3] : Port x Diff Data (where x = 1..4).  
Set to 1 if D+ > D- (forced differential 1, if signal is differential, i.e. not a SE0 or SE1). Set to 0 if D- > D+ (forced differential  
0, if signal is differential, i.e. not a SE0 or SE1).  
Bit [4..7] : Reserved.  
Set to 0.  
16.4  
Downstream Port Suspend and Resume  
The Hub Ports Suspend Register (Figure 16-8) and Hub Ports Resume Status Register (Figure 16-9) indicate the suspend and  
resume conditions on downstream ports. The suspend register must be set by firmware for any ports that are selectively  
suspended. Also, this register is only valid for ports that are selectively suspended.  
If a port is marked as selectively suspended, normal USB traffic is not sent to that port. Resume traffic is also prevented from  
going to that port, unless the Resume comes from the selectively suspended port. If a resume condition is detected on the port,  
hardware reflects a Resume back to the port, sets the Resume bit in the Hub Ports Resume Register, and generates a hub  
interrupt.  
If a disconnect occurs on a port marked as selectively suspended, the suspend bit is cleared.  
The Device Remote Wakeup bit (bit 7) of the Hub Ports Suspend Register controls whether or not the resume signal is propagated  
by the hub after a connect or a disconnect event. If the Device Remote Wakeup bit is set, the hub will automatically propagate  
the resume signal after a connect or a disconnect event. If the Device Remote Wakeup bit is cleared, the hub will not propagate  
the resume signal. The setting of the Device Remote Wakeup flag has no impact on the propagation of the resume signal after  
a downstream remote wakeup event. The hub will automatically propagate the resume signal after a remote wakeup event,  
regardless of the state of the Device Remote wakeup bit. The state of this bit has no impact on the generation of the hub interrupt.  
A resume bit is set automatically when hardware detects a resume condition on a selectively suspended downstream port. The  
resume condition is a differential ‘1’ for a low-speed device and a differential ‘0’ for a full-speed device.  
These registers are cleared on reset or USB bus reset.  
Hub Ports Suspend  
Address 0x4D  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Device  
Remote  
Wakeup  
Reserved  
Reserved  
Reserved  
Port 4  
Selective  
Suspend  
Port 3  
Selective  
Suspend  
Port 2  
Selective  
Suspend  
Port 1  
Selective  
Suspend  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 16-8. Hub Ports Suspend Register  
Bit [0..3] : Port x Selective Suspend (where x = 1..4).  
Set to 1 if Port x is Selectively Suspended; Set to 0 if Port x Do not suspend.  
Bit 7 : Device Remote Wakeup.  
When set to 1, Enable hardware upstream resume signaling for connect/disconnect events during global resume.  
When set to 0, Disable hardware upstream resume signaling for connect/disconnect events during global resume.  
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Hub Ports Resume  
Address 0x4E  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
Reserved  
Reserved  
Reserved  
Reserved  
Resume 4  
Resume 3  
Resume 2  
Resume 1  
-
-
-
-
R
0
R
0
R
0
R
0
0
0
0
0
Figure 16-9. Hub Ports Resume Status Register  
Bit [0..3] : Resume x (where x = 1..4).  
When set to 1 Port x requesting to be resumed (set by hardware); default state is 0.  
Bit [4..7] : Reserved.  
Set to 0.  
Resume from a selectively suspended port, with the hub not in suspend, typically involves the following actions:  
1. Hardware detects the Resume, drives a K to the port, and generates the hub interrupt. The corresponding bit in the Resume  
Status Register (0x4E) reads ‘1’ in this case.  
2. Firmware responds to hub interrupt, and reads register 0x4E to determine the source of the Resume.  
3. Firmware begins driving K on the port for 10 ms or more through register 0x4B.  
4. Firmware clears the Selective Suspend bit for the port (0x4D), which clears the Resume bit (0x4E). This ends the hardware-driv-  
en Resume, but the firmware-driven Resume continues. To prevent traffic being fed by the hub repeater to the port during or  
just after the Resume, firmware should disable this port.  
5. Firmware drives a timed SE0 on the port for two low-speed bit times as appropriate. Firmware must disable interrupts during  
this SE0 so the SE0 pulse isn’t inadvertently lengthened, and appear as a bus reset to the downstream device.  
6. Firmware drives a J on the port for one low-speed bit time, then it idles the port.  
7. Firmware re-enables the port.  
Resume when the hub is suspended typically involves these actions:  
1. Hardware detects the Resume, drives a K on the upstream (which is then reflected to all downstream enabled ports), and  
generates the hub interrupt.  
2. The part comes out of suspend and the clocks start.  
3. Once the clocks are stable, firmware execution resumes. An internal counter ensures that this takes at least 1 ms. Firmware  
should check for Resume from any selectively suspended ports. If found, the Selective Suspend bit for the port should be  
cleared; no other action is necessary.  
4. The Resume ends when the host stops sending K from upstream. Firmware should check for changes to the Enable and  
Connect Registers. If a port has become disabled but is still connected, an SE0 has been detected on the port. The port should  
be treated as having been reset, and should be reported to the host as newly connected.  
Firmware can choose to clear the Device Remote Wake-up bit (if set) to implement firmware timed states for port changes. All  
allowed port changes wake the part. Then, the part can use internal timing to determine whether to take action or return to  
suspend. If Device Remote Wake-up is set, automatic hardware assertions take place on Resume events.  
16.5  
USB Upstream Port Status and Control  
USB status and control is regulated by the USB Status and Control Register, as shown in Figure 16-10. All bits in the register are  
cleared during reset.  
.
USB Status and Control  
Address 0x1F  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Endpoint  
Size  
Endpoint  
Mode  
D+  
Upstream  
D–  
Upstream  
Bus Activity  
Control  
Action  
Bit 2  
Control  
Action  
Bit 1  
Control  
Action  
Bit 0  
Read/Write  
Reset  
R/W  
0
R/W  
0
R
0
R
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 16-10. USB Status and Control Register  
Bits[2..0]: Control Action  
Set to control action as per Table 16-2. The three control bits allow the upstream port to be driven manually by firmware.  
For normal USB operation, all of these bits must be cleared. Table 16-2 shows how the control bits affect the upstream port.  
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Table 16-2. Control Bit Definition for Upstream Port  
Control Bits  
000  
Control Action  
Not Forcing (SIE Controls Driver)  
Force D+[0] HIGH, D–[0] LOW  
Force D+[0] LOW, D–[0] HIGH  
Force SE0; D+[0] LOW, D–[0] LOW  
Force D+[0] LOW, D–[0] LOW  
Force D+[0] HiZ, D–[0] LOW  
Force D+[0] LOW, D–[0] HiZ  
Force D+[0] HiZ, D–[0] HiZ  
001  
010  
011  
100  
101  
110  
111  
Bit 3: Bus Activity.  
This is a “sticky” bit that indicates if any non-idle USB event has occurred on the upstream USB port. Firmware should  
check and clear this bit periodically to detect any loss of bus activity. Writing a ‘0’ to the Bus Activity bit clears it, while writing  
a ‘1’ preserves the current value. In other words, the firmware can clear the Bus Activity bit, but only the SIE can set it.  
Bits 4 and 5: D– Upstream and D+ Upstream.  
These bits give the state of each upstream port pin individually: 1 = HIGH, 0 = LOW.  
Bit 6: Endpoint Mode.  
This bit used to configure the number of USB endpoints. See Section 17.2 for a detailed description.  
Bit 7: Endpoint Size.  
This bit used to configure the number of USB endpoints. See Section 17.2 for a detailed description.  
The hub generates an EOP at EOF1 in accordance with the USB 1.1 Specification, Section 11.2.2 as well as USB 2.0 specification  
(section 11.2.5, page 304).  
17.0  
USB Serial Interface Engine Operation  
The CY7C65113C SIE supports operation as a single device or a compound device. This section describes the two device  
addresses, the configurable endpoints, and the endpoint function.  
17.1  
USB Device Addresses  
The USB Controller provides two USB Device Address Registers: A (addressed at 0x10)and B (addressed at 0x40). Upon reset  
and under default conditions, Device A has three endpoints and Device B has two endpoints. The USB Device Address Register  
contents are cleared during a reset, setting the USB device addresses to zero and disabling these addresses. Figure 17-1 shows  
the format of the USB Address Registers.  
USB Device Address (Device A, B)  
Addresses 0x10(A) and 0x40(B)  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Device  
Address  
Enable  
Device  
Address  
Bit 6  
Device  
Address  
Bit 5  
Device  
Address  
Bit 4  
Device  
Address  
Bit 3  
Device  
Address  
Bit 2  
Device  
Address  
Bit 1  
Device  
Address  
Bit 0  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 17-1. USB Device Address Registers  
Bits[6..0]: Device Address.  
Firmware writes this bits during the USB enumeration process to the non-zero address assigned by the USB host.  
Bit 7: Device Address Enable.  
Must be set by firmware before the SIE can respond to USB traffic to the Device Address.  
17.2  
USB Device Endpoints  
The CY7C65113C controller supports up to two addresses and five endpoints for communication with the host. The configuration  
of these endpoints, and associated FIFOs, is controlled by bits [7,6] of the USB Status and Control Register (Figure 16-10). Bit  
7 controls the size of the endpoints and bit 6 controls the number of addresses. These configuration options are detailed in  
Table 17-1. Endpoint FIFOs are part of user RAM (as shown in Section 5.4.1).  
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Table 17-1. Memory Allocation for Endpoints  
USB Status And Control Register (0x1F) Bits [7, 6]  
[0,0]  
[1,0]  
[0,1]  
[1,1]  
Two USB Addresses:  
A (3 Endpoints) and  
B (2 Endpoints)  
Two USB Addresses:  
A (3 Endpoints) and  
B (2 Endpoints)  
One USB Address:  
A (5 Endpoints)  
One USB Address:  
A (5 Endpoints)  
Label Start Address Size Label Start Address Size Label Start Address Size Label Start Address Size  
EPB1  
EPB0  
EPA2  
EPA1  
EPA0  
0xD8  
0xE0  
0xE8  
0xF0  
0xF8  
8
8
8
8
8
EPB0  
EPB1  
EPA0  
EPA1  
EPA2  
0xA8  
0xB0  
0xB8  
0xC0  
0xE0  
8
8
EPA4  
EPA3  
EPA2  
EPA1  
EPA0  
0xD8  
0xE0  
0xE8  
0xF0  
0xF8  
8
8
8
8
8
EPA3  
EPA4  
EPA0  
EPA1  
EPA2  
0xA8  
0xB0  
0xB8  
0xC0  
0xE0  
8
8
8
8
32  
32  
32  
32  
When the SIE writes data to a FIFO, the internal data bus is driven by the SIE; not the CPU. This causes a short delay in the  
CPU operation. The delay is three clock cycles per byte. For example, an 8-byte data write by the SIE to the FIFO generates a  
delay of 2 µs (3 cycles/byte * 83.33 ns/cycle * 8 bytes).  
17.3  
USB Control Endpoint Mode Registers  
All USB devices are required to have a control endpoint 0 (EPA0 and EPB0) that is used to initialize and control each USB address.  
Endpoint 0 provides access to the device configuration information and allows generic USB status and control accesses. Endpoint  
0 is bidirectional to both receive and transmit data. The other endpoints are unidirectional, but selectable by the user as IN or  
OUT endpoints.  
The endpoint mode registers are cleared during reset. When USB Status And Control Register Bits [6,7] are set to [0,0] or [1,0],  
the endpoint zero EPA0 and EPB0 mode registers use the format shown in Figure 17-2.  
USB Device Endpoint Zero Mode (A0, B0)  
Addresses 0x12(A0) and 0x42(B0)  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Endpoint 0  
SETUP  
Endpoint 0 Endpoint 0  
ACK  
Mode Bit 3 Mode Bit 2 Mode Bit 1 Mode Bit 0  
IN  
OUT  
Received  
Received  
Received  
Read/Write  
Reset  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
R/W  
0
Figure 17-2. USB Device Endpoint Zero Mode Registers  
Bits[3..0]: Mode.  
These sets the mode which control how the control endpoint responds to traffic.  
Bit 4: ACK.  
This bit is set whenever the SIE engages in a transaction to the register’s endpoint that completes with an ACK packet.  
Bit 5: Endpoint 0 OUT Received.  
1 = Token received is an OUT token. 0 = Token received is not an OUT token. This bit is set by the SIE to report the type  
of token received by the corresponding device address is an OUT token. The bit must be cleared by firmware as part of  
the USB processing.  
Bit 6: Endpoint 0 IN Received.  
1 = Token received is an IN token. 0 = Token received is not an IN token. This bit is set by the SIE to report the type of  
token received by the corresponding device address is an IN token. The bit must be cleared by firmware as part of the USB  
processing.  
Bit 7: Endpoint 0 SETUP Received.  
1 = Token received is a SETUP token. 0 = Token received is not a SETUP token. This bit is set ONLY by the SIE to report  
the type of token received by the corresponding device address is a SETUP token. Any write to this bit by the CPU will  
clear it (set it to 0). The bit is forced HIGH from the start of the data packet phase of the SETUP transaction until the start  
of the ACK packet returned by the SIE. The CPU should not clear this bit during this interval, and subsequently, until the  
CPU first does an IORD to this endpoint 0 mode register. The bit must be cleared by firmware as part of the USB  
[4]  
processing.  
Note:  
4. In 5-endpoint mode (USB Status And Control Register Bits [7,6] are set to [0,1] or [1,1]), Register 0x42 serves as non-control endpoint 3, and has the format for  
non-control endpoints shown in Figure 17-3.  
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Bits[6:0] of the endpoint 0 mode register are locked from CPU write operations whenever the SIE has updated one of these bits,  
which the SIE does only at the end of the token phase of a transaction (SETUP... Data... ACK, OUT... Data... ACK, or IN... Data...  
ACK). The CPU can unlock these bits by doing a subsequent read of this register. Only endpoint 0 mode registers are locked  
when updated. The locking mechanism does not apply to the mode registers of other endpoints.  
Because of these hardware locking features, firmware must perform an IORD after an IOWR to an endpoint 0 register. This verifies  
that the contents have changed as desired, and that the SIE has not updated these values.  
While the SETUP bit is set, the CPU cannot write to the endpoint zero FIFOs. This prevents firmware from overwriting an incoming  
SETUP transaction before firmware has a chance to read the SETUP data. Refer to Table 17-1 for the appropriate endpoint zero  
memory locations.  
The Mode bits (bits [3:0]) control how the endpoint responds to USB bus traffic. The mode bit encoding is shown in Table 18-1.  
[5]  
Additional information on the mode bits can be found in Table 18-2 and Table 18-3.  
17.4  
USB Non-control Endpoint Mode Registers  
The format of the non-control endpoint mode registers is shown in Figure 17-3.  
USB Non-control Device Endpoint Mode  
Addresses 0x14, 0x16, 0x44  
Bit #  
7
STALL  
R/W  
0
6
Reserved  
R/W  
5
Reserved  
R/W  
4
3
2
1
0
Bit Name  
Read/Write  
Reset  
ACK  
R/W  
0
Mode Bit 3 Mode Bit 2 Mode Bit 1 Mode Bit 0  
R/W  
0
R/W  
0
R/W  
0
R/W  
0
0
0
Figure 17-3. USB Non-control Device Endpoint Mode Registers  
Bits[3..0] : Mode.  
These sets the mode which control how the control endpoint responds to traffic. The mode bit encoding is shown in  
Bit 4 : ACK.  
This bit is set whenever the SIE engages in a transaction to the register’s endpoint that completes with an ACK packet.  
Bits[6..5]: Reserved.  
Must be written zero during register writes.  
Bit 7: STALL.  
If this STALL is set, the SIE stalls an OUT packet if the mode bits are set to ACK-IN, and the SIE stalls an IN packet if the  
mode bits are set to ACK-OUT. For all other modes, the STALL bit must be a LOW.  
17.5  
USB Endpoint Counter Registers  
There are five Endpoint Counter registers, with identical formats for both control and non-control endpoints. These registers  
contain byte count information for USB transactions, as well as bits for data packet status. The format of these registers is shown  
USB Endpoint Counter  
Addresses 0x11, 0x13, 0x15, 0x41, 0x43  
Bit #  
7
6
5
4
3
2
1
0
Bit Name  
Data 0/1  
Toggle  
Data Valid Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
Bit 5  
R/W  
0
Bit 4  
R/W  
0
Bit 3  
R/W  
0
Bit 2  
R/W  
0
Bit 1  
R/W  
0
Bit 0  
R/W  
0
Read/Write  
Reset  
R/W  
0
R/W  
0
Figure 17-4. USB Endpoint Counter Registers  
Bits[5..0]: Byte Count.  
These counter bits indicate the number of data bytes in a transaction. For IN transactions, firmware loads the count with  
the number of bytes to be transmitted to the host from the endpoint FIFO. Valid values are 0 to 32, inclusive. For OUT or  
SETUP transactions, the count is updated by hardware to the number of data bytes received, plus two for the CRC bytes.  
Valid values are 2 to 34, inclusive.  
Note:  
5. The SIE offers an “Ack out – Status in” mode and not an “Ack out – Nak in” mode. Therefore, if following the status stage of a Control Write transfer a USB host  
were to immediately start the next transfer, the new Setup packet could override the data payload of the data stage of the previous Control Write.  
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CY7C65113C  
Bit 6: Data Valid.  
This bit is set on receiving a proper CRC when the endpoint FIFO buffer is loaded with data during transactions. This bit is  
used OUT and SETUP tokens only. If the CRC is not correct, the endpoint interrupt occurs, but Data Valid is cleared to a  
zero.  
Bit 7: Data 0/1 Toggle.  
This bit selects the DATA packet’s toggle state: 0 for DATA0, 1 for DATA1. For IN transactions, firmware must set this bit to  
the desired state. For OUT or SETUP transactions, the hardware sets this bit to the state of the received Data Toggle bit.  
Whenever the count updates from a SETUP or OUT transaction on endpoint 0, the counter register locks and cannot be written  
by the CPU. Reading the register unlocks it. This prevents firmware from overwriting a status update on incoming SETUP or OUT  
transactions before firmware has a chance to read the data. Only endpoint 0 counter register is locked when updated. The locking  
mechanism does not apply to the count registers of other endpoints.  
17.6  
Endpoint Mode/Count Registers Update and Locking Mechanism  
The contents of the endpoint mode and counter registers are updated, based on the packet flow diagram in Figure 17-5. Two  
time points, SETUP and UPDATE, are shown in the same figure. The following activities occur at each time point:  
SETUP:  
The SETUP bit of the endpoint 0 mode register is forced HIGH at this time. This bit is forced HIGH by the SIE until the end of the  
data phase of a control write transfer. The SETUP bit can not be cleared by firmware during this time.  
The affected mode and counter registers of endpoint 0 are locked from any CPU writes once they are updated. These registers  
can be unlocked by a CPU read, only if the read operation occurs after the UPDATE. The firmware needs to perform a register  
read as a part of the endpoint ISR processing to unlock the effected registers. The locking mechanism on mode and counter  
registers ensures that the firmware recognizes the changes that the SIE might have made since the previous IO read of that  
register.  
UPDATE:  
1. Endpoint Mode Register – All the bits are updated (except the SETUP bit of the endpoint 0 mode register).  
2. Counter Registers – All bits are updated.  
3. Interrupt – If an interrupt is to be generated as a result of the transaction, the interrupt flag for the corresponding endpoint is  
set at this time. For details on what conditions are required to generate an endpoint interrupt, refer to Table 18-2.  
4. The contents of the updated endpoint 0 mode and counter registers are locked, except the SETUP bit of the endpoint 0 mode  
register which was locked earlier.  
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CY7C65113C  
1. IN Token  
Host To Device  
Device To Host  
Host To Device  
D
A
T
A
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
S
A
Y
C
N
K
C
IN  
Data  
16  
1/0  
Hand  
Shake  
Packet  
Token Packet  
Data Packet  
UPDATE  
Host To Device  
Device To Host  
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
IN  
NAK/STALL  
D
E
V
I
C
E
Token Packet  
Data Packet  
H
O
S
T
UPDATE  
2. OUT or SETUP Token without CRC error  
Device To Host  
Host To Device  
Host To Device  
O
U
T
D
A
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
S
ACK,  
Y
T
A
Data  
NAK,  
N
/
STAL  
C
Set  
up  
16  
1/0  
Hand  
Shake  
Packet  
Token Packet  
Data Packet  
UPDATE  
SETUP  
3. OUT or SETUP Token with CRC error  
Host To Device  
Host To Device  
O
U
T
D
A
T
A
1/0  
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
Data  
/
Set  
up  
16  
Token Packet  
Data Packet  
UPDATE only if FIFO is  
written  
Figure 17-5. Token/Data Packet Flow Diagram  
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CY7C65113C  
18.0  
USB Mode Tables  
Table 18-1. USB Register Mode Encoding  
Mode  
Moder  
Disable  
Bits SETUP  
0000 ignore  
0001 accept  
0010 accept  
0011 accept  
0100 accept  
0101 ignore  
IN  
OUT  
Comments  
ignore ignore Ignore all USB traffic to this endpoint  
Nak In/Out  
NAK  
stall  
stall  
NAK Forced from Setup on Control endpoint, from modes other than 0000  
check For Control endpoints  
Status Out Only  
Stall In/Out  
stall For Control endpoints  
Ignore In/Out  
Isochronous Out  
Status In Only  
Isochronous In  
Nak Out  
ignore ignore For Control endpoints  
ignore always For Isochronous endpoints  
0110 accept TX 0 Byte stall For Control Endpoints  
0111 ignore TX Count ignore For Isochronous endpoints  
1000 ignore  
ignore  
NAK Is set by SIE on an ACK from mode 1001 (Ack Out)  
Ack Out(STALL =0) 1001 ignore  
ignore  
ignore  
ACK On issuance of an ACK this mode is changed by SIE to 1000 (NAK  
stall Out)  
AckOut(STALL =1) 1001 ignore  
Nak Out - Status In  
Ack Out - Status In  
1010 accept TX 0 Byte NAK Is set by SIE on an ACK from mode 1011 (Ack Out – Status In)  
1011 accept TX 0 Byte ACK On issuance of an ACK this mode is changed by SIE to 1010 (NAK  
Out – Status In)  
Nak In  
1100 ignore  
NAK  
ignore Is set by SIE on an ACK from mode 1101 (Ack In)  
[6]  
Ack IN(STALL =0) 1101 ignore TX Count ignore On issuance of an ACK this mode is changed by SIE to 1100 (NAK In)  
[6]  
Ack IN(STALL =1) 1101 ignore  
stall  
ignore  
Nak In - Status Out  
Ack In - Status Out  
1110 accept  
NAK  
check Is set by SIE on an ACK from mode 1111 (Ack In – Status Out)  
1111 accept TX Count check On issuance of an ACK this mode is changed by SIE to 1110 (NAK In  
– Status Out)  
Mode  
This lists the mnemonic given to the different modes that can be set in the Endpoint Mode Register by writing to the lower nibble  
(bits 0..3). The bit settings for different modes are covered in the column marked “Mode Bits”. The Status IN and Status OUT  
represent the Status stage in the IN or OUT transfer involving the control endpoint.  
Mode Bits  
These column lists the encoding for different modes by setting Bits[3..0] of the Endpoint Mode register. This modes represents  
how the SIE responds to different tokens sent by the host to an endpoint. For instance, if the mode bits are set to “0001” (NAK  
IN/OUT), the SIE will respond with an  
• ACK on receiving a SETUP token from the host.  
• NAK on receiving an OUT token from the host.  
• NAK on receiving an IN token from the host.  
Refer to Section 13.0 for more information on the SIE functioning.  
SETUP, IN, and OUT  
These columns shows the SIE’s response to the host on receiving a SETUP, IN and OUT token depending on the mode set in  
the Endpoint Mode Register.  
A “Check” on the OUT token column, implies that on receiving an OUT token the SIE checks to see whether the OUT packet is  
of zero length and has a Data Toggle (DTOG) set to ‘1.’ If the DTOG bit is set and the received OUT Packet has zero length, the  
OUT is ACKed to complete the transaction. If either of this condition is not met the SIE will respond with a STALLL or just ignore  
the transaction.  
A “TX Count” entry in the IN column implies that the SIE transmit the number of bytes specified in the Byte Count (bits 3..0 of the  
Endpoint Count Register) to the host in response to the IN token received.  
A “TX0 Byte” entry in the IN column implies that the SIE transmit a zero length byte packet in response to the IN token received  
from the host.  
An “Ignore” in any of the columns means that the device will not send any handshake tokens (no ACK) to the host.  
An “Accept” in any of the columns means that the device will respond with an ACK to a valid SETUP transaction to the host.  
Note:  
6. STALL bit is bit 7 of the USB Non-control Device Endpoint Mode registers. For more information, refer to Section 17.4.  
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Comments  
Some Mode Bits are automatically changed by the SIE in response to certain USB transactions. For example, if the Mode Bits  
[3:0] are set to '1111' which is ACK IN-Status OUT mode as shown in Table 18-1, the SIE will change the endpoint Mode Bits [3:0]  
to NAK IN-Status OUT mode (1110) after ACK’ing a valid status stage OUT token. The firmware needs to update the mode for  
the SIE to respond appropriately. See Table 18-1 for more details on what modes will be changed by the SIE. A disabled endpoint  
will remain disabled until changed by firmware, and all endpoints reset to the disabled mode (0000). Firmware normally enables  
the endpoint mode after a SetConfiguration request.  
Any SETUP packet to an enabled endpoint with mode set to accept SETUPs will be changed by the SIE to 0001 (NAKing INs  
and OUTs). Any mode set to accept a SETUP will send an ACK handshake to a valid SETUP token.  
The control endpoint has three status bits for identifying the token type received (SETUP, IN, or OUT), but the endpoint must be  
placed in the correct mode to function as such. Non-control endpoints should not be placed into modes that accept SETUPs.  
Note that most modes that control transactions involving an ending ACK, are changed by the SIE to a corresponding mode which  
NAKs subsequent packets following the ACK. Exceptions are modes 1010 and 1110  
.
Table 18-2. Decode table for Table 18-3: “Details of Modes for Differing Traffic Condition  
Properties of Incoming  
Packets  
Changes to the Internal Register made by the SIE on receiving an incoming packet  
from the host  
Interrupt  
3
2
1
0
Token  
count  
buffer  
dval  
DTOG  
DVAL  
COUNT  
Setup  
In  
Out  
ACK  
3
2
1
0
Response Int  
Byte Count (bits 0..5, Figure 17-4)  
Data Valid (bit 6, Figure 17-4)  
Endpoint Mode  
encoding  
SIE’s Response  
to the Host  
Received Token  
(SETUP/IN/OUT)  
Data0/1 (bit7 Figure 17-4)  
PID Status Bits  
(Bit[7..5], Figure 17-2)  
Endpoint Mode bits  
Changed by the SIE  
The validity of the received data  
The quality status of the DMA buffer  
The number of received bytes  
Acknowledge phase completed  
Legend:  
TX : transmit  
RX : receive  
UC : unchanged  
TX0 :Transmit 0 length packet  
available for Control endpoint only  
x: don’t care  
The response of the SIE can be summarized as follows:  
1. The SIE will only respond to valid transactions, and will ignore non-valid ones.  
2. The SIE will generate an interrupt when a valid transaction is completed or when the FIFO is corrupted. FIFO corruption occurs  
during an OUT or SETUP transaction to a valid internal address, that ends with a non-valid CRC.  
3. An incoming Data packet is valid if the count is < Endpoint Size + 2 (includes CRC) and passes all error checking;  
4. An IN will be ignored by an OUT configured endpoint and visa versa.  
5. The IN and OUT PID status is updated at the end of a transaction.  
6. The SETUP PID status is updated at the beginning of the Data packet phase.  
7. The entire Endpoint 0 mode register and the Count register are locked to CPU writes at the end of any transaction to that  
endpoint in which an ACK is transferred. These registers are only unlocked by a CPU read of the register, which should be  
done by the firmware only after the transaction is complete. This represents about a 1-µs window in which the CPU is locked  
from register writes to these USB registers. Normally the firmware should perform a register read at the beginning of the  
Endpoint ISRs to unlock and get the mode register information. The interlock on the Mode and Count registers ensures that  
the firmware recognizes the changes that the SIE might have made during the previous transaction. Note that the setup bit of  
the mode register is NOT locked. This means that before writing to the mode register, firmware must first read the register to  
make sure that the setup bit is not set (which indicates a setup was received, while processing the current USB request). This  
read will of course unlock the register. So care must be taken not to overwrite the register elsewhere.  
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CY7C65113C  
.
Table 18-3. Details of Modes for Differing Traffic Conditions (see Table 18-2 for the decode legend)  
SETUP (if accepting SETUPs)  
Properties of Incoming Packet  
Changes made by SIE to Internal Registers and Mode Bits  
Mode Bits  
token  
count buffer  
dval  
valid  
x
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
ACK  
Intr  
yes  
yes  
yes  
See Table 18-1 Setup  
See Table 18-1 Setup  
See Table 18-1 Setup  
<= 10 data  
updates  
1
updates  
1
1
1
UC UC  
UC UC  
UC UC  
1
0
0
0
1
> 10  
x
junk  
junk  
updates updates updates  
updates updates  
UC  
UC  
NoChange ignore  
NoChange ignore  
invalid  
0
Properties of Incoming Packet  
Changes made by SIE to Internal Registers and Mode Bits  
Mode Bits  
token  
count buffer  
dval  
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
Intr  
DISABLED  
0
0
0
0
x
x
UC  
x
UC  
UC  
UC  
UC  
UC UC  
UC  
NoChange ignore  
no  
Nak In/Out  
0
0
0
0
0
0
1
1
Out  
In  
x
x
UC  
UC  
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
1
1
UC  
UC  
NoChange NAK  
NoChange NAK  
yes  
yes  
UC  
Ignore In/Out  
0
0
1
1
0
0
0
0
Out  
In  
x
x
UC  
UC  
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC UC  
UC  
UC  
NoChange ignore  
NoChange ignore  
no  
no  
Stall In/Out  
0
0
0
0
1
1
1
1
Out  
In  
x
x
UC  
UC  
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
1
1
UC  
UC  
NoChange Stall  
NoChange Stall  
yes  
yes  
UC  
CONTROL WRITE  
Properties of Incoming Packet  
Mode Bits token count buffer  
Normal Out/premature status In  
Changes made by SIE to Internal Registers and Mode Bits  
dval  
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
Intr  
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
Out  
Out  
Out  
In  
<= 10 data  
valid  
updates  
1
updates UC  
UC  
UC  
UC  
1
1
1
1
0
1
0
ACK  
yes  
yes  
yes  
yes  
> 10  
junk  
junk  
UC  
x
updates updates updates UC  
1
UC  
UC  
1
NoChange ignore  
NoChange ignore  
NoChange TX 0  
x
x
invalid  
x
updates  
UC  
0
updates UC  
1
UC  
UC  
UC  
UC  
NAK Out/premature status In  
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Out  
Out  
Out  
In  
<= 10 UC  
valid  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
1
UC  
UC  
UC  
1
NoChange NAK  
NoChange ignore  
NoChange ignore  
NoChange TX 0  
yes  
no  
> 10  
UC  
UC  
UC  
x
UC UC  
UC UC  
x
x
invalid  
x
no  
1
UC  
yes  
Status In/extra Out  
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
Out  
Out  
Out  
In  
<= 10 UC  
valid  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
1
UC  
UC  
UC  
1
0
0
1
1
Stall  
yes  
no  
> 10  
UC  
UC  
UC  
x
UC UC  
UC UC  
NoChange ignore  
NoChange ignore  
NoChange TX 0  
x
x
invalid  
x
no  
1
UC  
yes  
CONTROL READ  
Properties of Incoming Packet  
Mode Bits token count buffer  
Normal In/premature status Out  
Changes made by SIE to Internal Registers and Mode Bits  
dval  
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
Intr  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Out  
Out  
Out  
Out  
Out  
In  
2
UC  
UC  
UC  
UC  
UC  
UC  
valid  
valid  
valid  
x
1
1
updates UC  
updates UC  
updates UC  
UC  
UC  
UC  
1
1
1
1
NoChange ACK  
yes  
yes  
yes  
no  
2
0
1
UC  
UC  
UC  
UC  
1
0
0
0
0
1
1
1
1
Stall  
Stall  
!=2  
> 10  
x
updates  
UC  
1
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC UC  
NoChange ignore  
NoChange ignore  
invalid  
x
UC  
no  
x
UC  
1
UC  
1
1
1
0
ACK (back)  
yes  
Nak In/premature status Out  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
Out  
Out  
Out  
Out  
Out  
In  
2
UC  
UC  
UC  
UC  
UC  
UC  
valid  
valid  
valid  
x
1
1
updates UC  
updates UC  
updates UC  
UC  
UC  
UC  
1
1
1
1
NoChange ACK  
yes  
yes  
yes  
no  
2
0
1
UC  
UC  
UC  
UC  
UC  
0
0
0
0
1
1
1
1
Stall  
Stall  
!=2  
> 10  
x
updates  
UC  
1
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC UC  
NoChange ignore  
NoChange ignore  
NoChange NAK  
invalid  
x
UC  
no  
x
UC  
1
UC  
yes  
Status Out/extra In  
0
0
0
0
1
1
0
0
Out  
Out  
2
2
UC  
UC  
valid  
valid  
1
0
1
1
updates UC  
updates UC  
UC  
UC  
1
1
1
NoChange ACK  
yes  
yes  
UC  
0
0
1
1
Stall  
Document #: 38-08002 Rev. *D  
Page 41 of 49  
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CY7C65113C  
Table 18-3. Details of Modes for Differing Traffic Conditions (see Table 18-2 for the decode legend) (continued)  
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
Out  
Out  
Out  
In  
!=2  
> 10  
x
UC  
UC  
UC  
UC  
valid  
updates  
UC  
1
updates UC  
UC  
1
UC  
UC  
UC  
UC  
0
0
1
1
Stall  
yes  
no  
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
NoChange ignore  
NoChange ignore  
invalid  
x
UC  
1
1
UC  
UC  
no  
x
UC  
0
0
1
1
Stall  
yes  
OUT ENDPOINT  
Properties of Incoming Packet  
Changes made by SIE to Internal Registers and Mode Bits  
Mode Bits  
token  
count buffer  
dval  
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
Intr  
Normal Out/erroneous In  
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
Out  
Out  
Out  
In  
<= 10 data  
valid  
updates  
1
updates UC  
UC  
UC  
UC  
1
1
1
1
1
0
0
0
ACK  
yes  
yes  
yes  
no  
> 10  
junk  
junk  
UC  
x
updates updates updates UC  
UC  
UC  
UC  
NoChange ignore  
NoChange ignore  
NoChange ignore  
x
x
invalid  
x
updates  
UC  
0
updates UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
(STALL = 0)  
NoChange Stall  
(STALL = 1)  
1
0
0
1
In  
x
UC  
x
UC  
UC  
UC UC  
UC  
no  
NAK Out/erroneous In  
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
Out  
Out  
Out  
In  
<= 10 UC  
valid  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
1
UC  
UC  
UC  
UC  
NoChange NAK  
yes  
no  
no  
> 10  
UC  
UC  
UC  
x
UC UC  
UC UC  
UC UC  
NoChange ignore  
NoChange ignore  
NoChange ignore  
x
x
invalid  
x
no  
Isochronous endpoint (Out)  
0
0
1
1
0
0
1
1
Out  
In  
x
x
updates updates  
updates updates updates UC  
UC UC UC UC  
UC  
1
1
NoChange RX  
yes  
no  
UC  
x
UC UC  
UC  
NoChange ignore  
IN ENDPOINT  
Properties of Incoming Packet  
Mode Bits token count buffer  
Normal In/erroneous Out  
Changes made by SIE to Internal Registers and Mode Bits  
dval  
DTOG  
DVAL  
COUNT Setup  
In  
Out ACK  
Mode Bits Response  
Intr  
no  
1
1
1
1
1
1
0
0
0
1
1
1
Out  
Out  
In  
x
x
x
UC  
UC  
UC  
x
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC UC  
UC  
UC  
1
NoChange ignore  
(STALL = 0)  
UC  
UC  
NoChange stall  
no  
(STALL = 1)  
UC  
UC  
1
UC  
1
1
0
0
ACK (back)  
yes  
NAK In/erroneous Out  
1
1
1
1
0
0
0
0
Out  
In  
x
x
UC  
UC  
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC  
UC  
UC  
NoChange ignore  
NoChange NAK  
no  
1
yes  
Isochronous endpoint (In)  
0
0
1
1
1
1
1
1
Out  
In  
x
x
UC  
UC  
x
x
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC  
UC UC  
UC  
UC  
UC  
NoChange ignore  
NoChange TX  
no  
1
yes  
Document #: 38-08002 Rev. *D  
Page 42 of 49  
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CY7C65113C  
19.0  
Register Summary  
Address  
Register Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Read/Write/B  
oth/–[7]  
Default/  
Reset  
0x00  
0x01  
0x02  
0x03  
0x04  
Port 0 Data  
P0.7  
P1.7  
P2.7  
P3.7  
P0.6  
P1.6  
P2.6  
P3.6  
P0.5  
P1.5  
P2.5  
P3.5  
P0.4  
P1.4  
P2.4  
P3.4  
P0.3  
P1.3  
P2.3  
P3.3  
P0.2  
P1.2  
P2.2  
P3.2  
P0.1  
P1.1  
P2.1  
P3.1  
P0.0  
P1.0  
P2.0  
P3.0  
BBBBBBBB  
BBBBBBBB  
BBBBBBBB  
BBBBBBBB  
11111111  
11111111  
11111111  
11111111  
Port 1 Data  
Port 2 Data  
Port 3 Data  
Port 0 Interrupt Enable  
P0.7 Intr  
Enable  
P0.6 Intr  
Enable  
P0.5 Intr  
Enable  
P0.4 Intr  
Enable  
P0.3 Intr  
Enable  
P0.2 Intr  
Enable  
P0.1 Intr  
Enable  
P0.0 Intr  
Enable  
WWWWWWWW 00000000  
0x05  
0x08  
Port 1 Interrupt Enable  
GPIO Configuration  
P1.7 Intr  
Enable  
P1.6 Intr  
Enable  
P1.5 Intr  
Enable  
P1.4 Intr  
Enable  
Reserved  
P1.2 Intr  
Enable  
P1.1 Intr  
Enable  
P1.0 Intr  
Enable  
WWWWWWWW 00000000  
Reserved  
Reserved  
Reserved  
Reserved  
Port 1  
Port 1  
Port 0  
Port 0  
BBBBBBBB  
00000000  
Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0  
2
2
2
0x09  
0x10  
HAPI/I C Configuration  
I C Position  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
I C Port  
Width  
Reserved  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
USB Device Address A  
Device  
Address A  
Enable  
Device  
Address A  
Bit 6  
Device  
Address A  
Bit 5  
Device  
Address A  
Bit 4  
Device  
Address A  
Bit 3  
Device  
Address A  
Bit 2  
Device  
Address A  
Bit 1  
Device  
Address A  
Bit 0  
0x11  
0x12  
EP A0 Counter  
Register  
Data 0/1  
Toggle  
Data Valid  
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
EP A0 Mode Register  
Endpoint0  
SETUP  
Received  
Endpoint0  
IN  
Received  
Endpoint0  
OUT  
ACK  
Mode Bit 3  
Mode Bit 2  
Mode Bit 1  
Mode Bit 0  
Received  
0x13  
EP A1 Counter  
Register  
Data 0/1  
Toggle  
Data Valid  
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
BBBBBBBB  
00000000  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
0x14  
0x15  
EP A1 Mode Register  
STALL  
-
-
ACK  
Mode Bit 3  
Mode Bit 2  
Mode Bit 1  
Mode Bit 0  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
EP A2 Counter  
Register  
Data 0/1  
Toggle  
Data Valid  
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
0x16  
EP A2 Mode Register  
STALL  
-
-
ACK  
Mode Bit 3  
Mode Bit 2  
Mode Bit 1  
Mode Bit 0  
BBBBBBBB  
00000000  
0x1F  
0x20  
USB Status and Control  
Global Interrupt Enable  
Endpoint  
Size  
Endpoint  
Mode  
D+  
D–  
Bus Activity  
Control  
Bit 2  
Control  
Bit 1  
Control  
Bit 0  
BBRRBBBB  
-BBBBBBB  
-0xx0000  
-0000000  
Upstream  
Upstream  
2
Reserved  
I C  
GPIO  
Interrupt  
Enable  
Reserved  
USB Hub  
Interrupt  
Enable  
1.024-ms  
Interrupt  
Enable  
128-µs  
Interrupt  
Enable  
USB Bus  
RESET  
Interrupt  
Enable  
Interrupt  
Enable  
0x21  
Endpoint Interrupt  
Enable  
Reserved  
Reserved  
Reserved  
EPB1  
Interrupt  
Enable  
EPB0  
Interrupt  
Enable  
EPA2  
Interrupt  
Enable  
EPA1  
Interrupt  
Enable  
EPA0  
Interrupt  
Enable  
---BBBBB  
---00000  
0x24  
0x25  
Timer (LSB)  
Timer (MSB)  
Timer Bit 7  
Reserved  
Timer Bit 6  
Reserved  
Timer Bit 5  
Reserved  
Timer Bit 4  
Reserved  
Timer Bit 3  
Timer Bit 2  
Timer Bit 1  
Timer Bit 0  
Timer Bit 8  
RRRRRRRR  
----rrrr  
00000000  
----0000  
Timer Bit 11 Timer Bit 10 Time Bit 9  
2
2
0x28  
I C Control and Status  
MSTR  
Mode  
Continue/  
Busy  
Xmit  
Mode  
ACK  
Addr  
ARB Lost/  
Restart  
Received  
Stop  
I C  
BBBBBBBB  
00000000  
Enable  
2
2
2
2
2
2
2
2
2
0x29  
0x40  
I C Data  
I C Data 7  
I C Data 6  
I C Data 5  
I C Data 4  
I C Data 3  
I C Data 2  
I C Data 1  
I C Data 0  
BBBBBBBB  
BBBBBBBB  
XXXXXXXX  
00000000  
USB Device Address B  
Device  
Address B  
Enable  
Device  
Address B  
Bit 6  
Device  
Address B  
Bit 5  
Device  
Address B  
Bit 4  
Device  
Address B  
Bit 3  
Device  
Address B  
Bit 2  
Device  
Address B  
Bit 1  
Device  
Address B  
Bit 0  
0x41  
0x42  
EP B0 Counter Register  
EP B0 Mode Register  
Data 0/1  
Toggle  
Data Valid  
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Endpoint 0  
SETUP  
Received  
Endpoint 0  
IN  
Received  
Endpoint 0  
OUT  
ACK  
Mode Bit 3  
Mode Bit 2  
Mode Bit 1  
Mode Bit 0  
Received  
0x43  
0x44  
EP B1 Counter Register  
EP B1 Mode Register  
Data 0/1  
Toggle  
Data Valid  
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
STALL  
-
-
ACK  
Mode Bit 3  
Mode Bit 2  
Mode Bit 1  
Mode Bit 0  
Note:  
7. B: Read and Write; W: Write; R: Read.  
Document #: 38-08002 Rev. *D  
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CY7C65113C  
19.0  
Register Summary (continued)  
Address  
Register Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Read/Write/B  
oth/–[7]  
Default/  
Reset  
0x48  
Hub Port Connect Status  
Reserved  
Reserved  
Reserved  
Reserved  
Port 4  
Connect  
Status  
Port 3  
Connect  
Status  
Port 2  
Connect  
Status  
Port 1  
Connect  
Status  
BBBBBBBB  
00000000  
0x49  
0x4A  
0x4B  
0x4D  
Hub Port Enable  
Hub Port Speed  
Reserved  
Reserved  
Port 4  
Reserved  
Reserved  
Port 4  
Reserved  
Reserved  
Port 3  
Reserved  
Reserved  
Port 3  
Port 4  
Port 3  
Port 2  
Port 1  
BBBBBBBB  
BBBBBBBB  
BBBBBBBB  
BBBBBBBB  
00000000  
00000000  
00000000  
00000000  
Enable  
Enable  
Enable  
Enable  
Port 4  
Speed  
Port 3  
Speed  
Port 2  
Speed  
Port 1  
Speed  
Hub Port Control (Ports  
4:1)  
Port 2  
Port 2  
Port 1  
Port 1  
Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0  
Hub Port Suspend  
Device  
Remote  
Wakeup  
Reserved  
Reserved  
Reserved  
Port 4  
Selective  
Suspend  
Port 3  
Selective  
Suspend  
Port 2  
Selective  
Suspend  
Port 1  
Selective  
Suspend  
0x4E  
0x4F  
Hub Port Resume Status  
Hub Port SE0 Status  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Resume 4  
Port 4  
Resume 3  
Port 3  
Resume 2  
Port 2  
Resume 1  
Port 1  
-RRRRRRR  
RRRRRRRR  
00000000  
00000000  
SE0 Status SE0 Status SE0 Status SE0 Status  
0x50  
0x51  
Hub Ports Data  
Reserved  
Reserved  
Reserved  
Reserved  
Port 4  
Port 3  
Port 2  
Port 1  
RRRRRRRR  
BBBBBBBB  
00000000  
00000000  
Diff. Data  
Diff. Data  
Diff. Data  
Diff. Data  
Hub Port Force Low  
(Ports 4:1)  
Force Low  
D+[4]  
Force Low  
D–[4]  
Force Low  
D+[3]  
Force Low  
D–[3]  
Force Low  
D+[2]  
Force Low  
D–[2]  
Force Low  
D+[1]  
Force Low  
D–[1]  
0xFF  
Process Status & Control  
IRQ  
Pending  
Watchdog  
Reset  
USB Bus  
Reset  
Interrupt  
Power-on  
Reset  
Suspend  
Interrupt  
Enable  
Sense  
Reserved  
Run  
RBBBBRBB  
00010001  
Document #: 38-08002 Rev. *D  
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CY7C65113C  
20.0  
Sample Schematic  
USB-A  
Vbus  
D–  
D+  
GND  
3.3V Regulator  
Vref  
OUT  
IN  
2.2 µF  
Vref  
1.5K  
2.2 µF  
(R  
)
UUP  
USB-B  
0.01 µF  
0.01 µF  
Vbus  
Vbus  
D–  
22x2(R  
)
ext  
D+  
GND  
USB-A  
Vbus  
D–  
D+  
GND  
22x8(R  
)
ext  
SHELL  
D0–  
D0+  
D1-  
D1+  
4.7 nF  
250 VAC  
Optional  
D2-  
XTALO  
XTALI  
D2+  
10M  
D3-  
6.000 MHz  
D3+  
GND  
GND  
Vpp  
D4-  
USB-A  
Vbus  
D–  
D4+  
D+  
GND  
15K(x8)  
(R  
)
UDN  
USB-A  
Vbus  
D–  
POWER  
MANAGEMENT  
D+  
GND  
21.0  
Absolute Maximum Ratings  
Storage Temperature .......................................................................................................................................... –65°C to +150°C  
Ambient Temperature with Power Applied................................................................................................................. 0°C to +70°C  
Supply voltage on V relative to V .................................................................................................................... –0.5V to +7.0V  
CC  
SS  
DC Input Voltage.......................................................................................................................................... –0.5V to +V + 0.5V  
CC  
DC Voltage applied to Outputs in High Z State ............................................................................................ –0.5V to +V + 0.5V  
CC  
Power Dissipation ..............................................................................................................................................................500 mW  
Static Discharge Voltage ...................................................................................................................................................> 2000V  
Latch-up Current ............................................................................................................................................................ > 200 mA  
Max Output Sink Current into Port 0, 1 ............................................................................................................................... 60 mA  
Max Output Sink Current into DAC[7:2] Pins....................................................................................................................... 10 mA  
Max Output Source Current from Port 1, 2, 3, 4, 5, 6, 7 ..................................................................................................... 30 mA  
Document #: 38-08002 Rev. *D  
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CY7C65113C  
22.0  
Electrical Characteristics  
f
= 6 MHz; Operating Temperature = 0 to 70°C, V = 4.0V to 5.25V  
CC  
OSC  
Parameter  
Description  
Conditions  
Min.  
Max.  
Unit  
General  
V
Reference Voltage  
Programming Voltage (disabled)  
Operating Current  
3.3V ±5%  
3.15  
–0.4  
3.45  
0.4  
50  
50  
10  
1
V
REF  
V
V
pp  
ICC  
V
No GPIO source current  
mA  
µA  
mA  
µA  
CC  
ISB1  
Supply Current—Suspend Mode  
Operating Current  
I
I
V
No USB Traffic  
ref  
il  
REF  
Input Leakage Current  
Any pin  
USB Interface  
| (D+)–(D–) |  
V
V
V
Differential Input Sensitivity  
0.2  
0.8  
0.8  
V
V
di  
Differential Input Common Mode Range  
Single Ended Receiver Threshold  
Transceiver Capacitance  
2.5  
2.0  
20  
cm  
se  
V
C
I
pF  
µA  
in  
Hi-Z State Data Line Leakage  
External USB Series Resistor  
0V < V < 3.3V  
–10  
19  
10  
lo  
in  
R
R
R
In series with each USB pin  
21  
ext  
External Upstream USB Pull-up Resistor 1.5 k±5%, D+ to V  
1.425 1.575  
14.25 15.75  
kΩ  
kΩ  
UUP  
UDN  
REG  
External Downstream Pull-down Resistors 15 k±5%, downstream USB pins  
Power-on Reset  
t
V
Ramp Rate  
Linear ramp 0V to V  
CC  
0
100  
ms  
vccs  
CC  
USB Upstream/Downstream Port  
V
V
Z
Static Output High  
15 k±5% to Gnd  
2.8  
28  
3.6  
0.3  
44  
V
V
UOH  
Static Output Low  
1.5 k±5% to V  
UOL  
REF  
USB Driver Output Impedance  
Including R Resistor  
O
ext  
General Purpose I/O (GPIO)  
R
Pull-up Resistance (typical 14 kΩ)  
Input Threshold Voltage  
8.0  
20%  
2%  
24.0  
40%  
8%  
kΩ  
up  
ITH  
H
V
V
V
All ports, low-to-high edge  
All ports, high-to-low edge  
V
V
CC  
CC  
Input Hysteresis Voltage  
Port 0,1 Output Low Voltage  
I
I
= 3 mA  
= 8 mA  
0.4  
2.0  
V
V
OL  
OL  
OL  
V
Output High Voltage  
I
= 1.9 mA (all ports 0,1)  
2.4  
V
OH  
OH  
Notes:  
8. Add 18 mA per driven USB cable (upstream or downstream. This is based on transitions every 2 full-speed bit times on average.  
9. Power-on Reset occurs whenever the voltage on V is below approximately 2.5V.  
CC  
Document #: 38-08002 Rev. *D  
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CY7C65113C  
23.0  
Switching Characteristics (f  
= 6.0 MHz)  
OSC  
Parameter  
Description  
Clock Source  
Min.  
Max.  
Unit  
f
t
t
t
Clock Rate  
6 ±0.25%  
166.25  
MHz  
ns  
OSC  
cyc  
CH  
Clock Period  
167.08  
Clock HIGH time  
Clock LOW time  
0.45 t  
0.45 t  
ns  
CYC  
CYC  
ns  
CL  
USB Full-speed Signaling  
t
t
t
t
Transition Rise Time  
Transition Fall Time  
4
4
20  
20  
ns  
ns  
rfs  
ffs  
Rise/Fall Time Matching; (t /t )  
90  
111  
%
rfmfs  
dratefs  
r f  
Full Speed Date Rate  
12 ±0.25%  
Mb/s  
Timer Signals  
t
Watchdog Timer Period  
8.192  
14.336  
ms  
watch  
Note:  
10. Per Table 7-6 of revision 1.1 of USB specification.  
t
CYC  
t
CH  
CLOCK  
t
CL  
t
t
r
r
D+  
90%  
90%  
10%  
10%  
D−  
Document #: 38-08002 Rev. *D  
Page 47 of 49  
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CY7C65113C  
24.0  
Ordering Information  
Ordering Code  
PROM Size  
Package Type  
Operating Range  
CY7C65113C-SXC  
CY7C65113C-SXCT  
8 KB  
8 KB  
28-pin SOIC  
28-pin SOIC-Tape Reel  
Commercial  
Commercial  
25.0  
Package Diagram  
28-Lead (300-Mil) Molded SOIC  
NOTE :  
PIN 1 ID  
1. JEDEC STD REF MO-119  
2. BODY LENGTH DIMENSION DOES NOT INCLUDE MOLD PROTRUSION/END FLASH,BUT  
DOES INCLUDE MOLD MISMATCH AND ARE MEASURED AT THE MOLD PARTING LINE.  
MOLD PROTRUSION/END FLASH SHALL NOT EXCEED 0.010 in (0.254 mm) PER SIDE  
14  
1
MIN.  
3. DIMENSIONS IN INCHES  
MAX.  
0.291[7.39]  
0.300[7.62]  
4. PACKAGE WEIGHT 0.85gms  
*
0.394[10.01]  
0.419[10.64]  
PART #  
15  
28  
0.026[0.66]  
0.032[0.81]  
S28.3 STANDARD PKG.  
SZ28.3 LEAD FREE PKG.  
SEATING PLANE  
0.697[17.70]  
0.713[18.11]  
0.092[2.33]  
0.105[2.67]  
*
0.004[0.10]  
0.0091[0.23]  
0.0125[3.17]  
0.015[0.38]  
0.050[1.27]  
0.013[0.33]  
0.019[0.48]  
*
0.004[0.10]  
0.050[1.27]  
TYP.  
0.0118[0.30]  
51-85026-*D  
2
Purchase of I C components from Cypress, or one of its sublicensed Associated Companies, conveys a license under the Philips  
2
2
2
I C Patent Rights to use these components in an I C system, provided that the system conforms to the I C Standard Specification  
as defined by Philips. All product and company names mentioned in this document are the trademarks of their respective holders.  
Document #: 38-08002 Rev. *D  
Page 48 of 49  
© Cypress Semiconductor Corporation, 2006. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use  
of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be  
used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its  
products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress  
products in life-support systems application implDiesotwhantlothaedmfarnoumfacWturwerwa.sSsuommeasnaullarilssk.cofosmuc.hAulsleMaannduinadlsoinSgesaoricnhdeAmnndifieDsoCwypnrelosasda.gainst all charges.  
   
CY7C65113C  
Document History Page  
Document Title: CY7C65113C USB Hub with Microcontroller  
Document Number: 38-08002  
Orig. of  
REV.  
**  
ECN NO. Issue Date Change  
Description of Change  
109965  
120372  
02/22/02  
12/17/02  
SZV  
Change from Spec number: 38-00590 to 38-08002  
*A  
MON  
Added register bit definitions.  
Added default bit state of each register.  
Corrected the Schematic (location of the pull-up on D+).  
Corrected the Logical Diagram (removed the extra GPIO Port 1).  
Added register summary.  
Modified Figure 17-5, more labeling.  
Removed information on the availability of the part in PDIP package.  
Modified Table 18-1 and provided more explanation regarding  
locking/unlocking mechanism of the mode register.  
Removed any information regarding the speed detect bit in Hub Port Speed  
register being set by hardware.  
*B  
*C  
*D  
124522  
368601  
429098  
03/13/03  
See ECN  
See ECN  
MON  
BHA  
TYJ  
Fixed the figure on page 42 regarding the update of mode registers. The  
arrows in the figure were misplaced and the figure was unreadable. This is  
an important figure for understanding mode register functioning.  
Added Lead-free Package Information.  
Removed CY7C65013 Information.  
Updated Package Drawing.  
Part numbers changed to ‘C’ types  
Cypress Perform logo added  
Part numbers updated in the ordering section  
Document #: 38-08002 Rev. *D  
Page 49 of 49  
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