INTEGRATED CIRCUITS
PDIUSBH12
USB 2-port hub
Product specification
1999 Jul 22
Supersedes data of 1999 Feb 25
Philips
Semiconductors
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
BLOCK DIAGRAM
12 MHz
PLL
UPSTREAM
PORT
3.3V
D–
D+
1.5kΩ
INTEGRATED
RAM
D+
BIT CLOCK
RECOVERY
SoftConnect
ANALOG
T /R
X
X
2
FULL SPEED
I C
MEMORY
MANAGEMENT
UNIT
PHILIPS
SIE
SLAVE
INTERFACE
END OF
FRAME
TIMERS
HUB
REPEATER
GENERAL
PORT
CONTROLLER
ANALOG
T /R
ANALOG
INTERRUPT
SDA SCL
BLINKING
GOODLINK
CONTROL
GOODLINK
CONTROL
T /R
X
X
X
X
NO LIGHT
LIT
D+
D–
LED
D+
D–
LED
NO
DATA
TRANSFER
CONNECTED
GOODLINK
CONNECTION
DOWNSTREAM
PORT 2
DOWNSTREAM
PORT 3
SV00852
NOTE:
1. This is a conceptual block diagram and does not include each individual signal.
3
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Analog Transceivers
Memory Management Unit (MMU) and Integrated
These transceivers interface directly to the USB cables through
some termination resistors. They are capable of transmitting and
receiving serial data at both “full speed” (12 Mbit/s) and “low speed”
(1.5 Mbit/s) data rates.
RAM
The MMU and the integrated RAM is used to handle the large
difference in data rate between USB, running in bursts of 12 Mbit/s
2
and the I C interface to the microcontroller, running at up to
1 Mbit/s. This allows the microcontroller to read and write USB
packets at its own speed through I C.
Hub Repeater
2
The hub repeater is responsible for managing connectivity on a per
packet basis. It implements packet signaling connectivity and
resume connectivity.
2
I C Slave Interface
2
This block implements the necessary I C interface protocol. A slave
2
I C allows for simple micro-coding. An interrupt is used to alert the
Low speed devices can be connected to downstream ports since the
repeater will not propagate upstream packets to downstream ports,
to which low speed devices are connected, unless they are
preceded by a PREAMBLE PID.
microcontroller whenever the PDIUSBH12 needs attention. As a
2
2
slave I C device, the PDIUSBH12 I C clock: SCL is an input and is
2
controlled by the microcontroller. The I C interface can run up to 1
Mbit/s.
End of Frame Timers
SoftConnect
This block contains the specified EOF1 and EOF2 timers which are
used to detect loss-of-activity and babble error conditions in the hub
repeater. The timers also maintain the low-speed keep-alive strobe
which is sent at the beginning of a frame.
The connection to the USB is accomplished by bringing D+ (for
high-speed USB device) high through a 1.5 kΩ pull-up resistor. In
the PDIUSBH12, the 1.5 kΩ pull-up resistor is integrated on-chip
and is not connected to V by default. Similarly, the 15 kΩ
CC
pull-down resistors are integrated on-chip and are not connected to
GND by default. The connection of the internal resistors to Vcc is
established through a command sent by the external/system
microcontroller. This allows the system microcontroller to complete
its initialization sequence before deciding to establish connection to
the USB. Re-initialization of the USB bus connection can also be
affected without requiring the pull out of the cable.
General and Individual Port Controller
The general and individual port controllers together provide status
2
and control of individual downstream ports. Via the I C-interface a
microcontroller can access the downstream ports and request or
change the status of each individual port.
Any change in the status or settings of the individual port will result
in an interrupt request. Via an interrupt register, the servicing
microcontroller can look up the downstream port which generated
the interrupt and request its new status. Any port status change can
then be reported to the host via the hub status change (interrupt)
endpoint.
The PDIUSBH12 will check for USB VBUS availability before the
connection can be established. VBUS sensing is provided through
OCURRENT_N pin. See the pin description for details. Sharing of
VBUS sensing and overcurrent sensing can be easily accomplished
by using VBUS voltage as the pull-up voltage for the open drain
output of the overcurrent indication device.
PLL
A 12 MHz to 48 MHz clock multiplier PLL (Phase-Locked Loop) is
integrated on-chip. This allows for the use of low-cost 12 MHz
crystal. EMI is also minimized due to lower frequency crystal. No
external components are needed for the operation of the PLL.
It should be noted that the tolerance of the internal resistors is
higher (30%) than that specified by the USB specification (5%).
However, the overall V voltage specification for the connection
SE
can still be met with good margin. The decision to make use of this
feature lies with the users.
Bit Clock Recovery
The bit clock recovery circuit recovers the clock from the incoming
USB data stream using 4X over-sampling principle. It is able to track
jitter and frequency drift specified by the USB specification.
SoftConnect is a patent pending technology from Philips
Semiconductors.
GoodLink
Philips Serial Interface Engine (PSIE)
Good downstream USB connection indication is provided through
GoodLink technology. When the port is enabled and there is at
least one valid upstream traffic from the port, the LED indicator will
be ON. The LED indicator will blink on every valid upstream traffic. A
valid upstream traffic is defined as traffic with a good SOP and
terminated by a good EOP. During global suspend, all LEDs will be
OFF.
The Philips SIE implements the full USB protocol layer. It is
completely hardwired for speed and needs no firmware intervention.
The functions of this block include: synchronization pattern
recognition, parallel/serial conversion, bit stuffing/de-stuffing, CRC
checking/generation, PID verification/generation, address
recognition, handshake evaluation/generation.
This feature provides a user-friendly indicator on the status of the
hub, the connected downstream devices and the USB traffic. It is a
useful field diagnostics tool to isolate the faulty equipment. This
feature helps lower the field support and the hotline costs.
4
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
ENDPOINT DESCRIPTIONS
There are two endpoint configuration modes supported by the PDIUSBH12, the Single Embedded Function mode and the Multiple (3)
Embedded Function mode. The Single Embedded Function mode is the default at power up reset. The Multiple (3) Embedded Function mode
can be configured by writing a zero to bit 7 of the first byte of the Set Mode command. Either mode is backward compatible to the PDIUSBH11.
Table 1. SINGLE EMBEDDED FUNCTION MODE (DEFAULT AT POWER UP)
MAX
PACKET SIZE
(BYTES)
ENDPOINT
INDEX
TRANSFER
TYPE
FUNCTION
PORTS
ENDPOINT #
DIRECTION
0
1
OUT
IN
8
8
0
1
0
Control
Interrupt
Control
0: Upstream
2–3: Downstream
Hub
–
IN
1
2
3
OUT
IN
8
8
5
4
OUT
IN
8
8
1
2
3
Generic
Generic
Generic
Embedded
Function 1
1
6
7
OUT
IN
8
8
8
9
OUT
IN
8
8
NOTE:
1. Hub interrupt endpoint is not indexed.
2. Generic endpoint can be used for Interrupt or Bulk endpoint.
Table 2. MULTIPLE (3) EMBEDDED FUNCTION MODE
MAX
PACKET SIZE
(BYTES)
ENDPOINT
INDEX
TRANSFER
TYPE
FUNCTION
PORTS
ENDPOINT #
DIRECTION
0
1
OUT
IN
8
8
0
1
0
Control
Interrupt
Control
0: Upstream
2–3: Downstream
Hub
–
IN
1
2
3
OUT
IN
8
8
Embedded
Function 1
1
6
7
5
4
OUT
IN
8
8
1
0
1
0
1
Generic
Control
Generic
Control
Generic
10
11
OUT
IN
8
8
Embedded
Function 6
6
7
OUT
IN
8
8
12
13
OUT
IN
8
8
Embedded
Function 7
8
9
OUT
IN
8
8
5
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
PINNING
The PDIUSBH12 has two modes of operation. The first mode (Mode 0) configures the pins DNx_GL_N for GoodLink LED indication. The
second mode (Mode 1) configures the LED pins as per port overcurrent condition pins. An overcurrent condition on any port can be uniquely
identified in Mode 1. However, all downstream ports are disabled as a result of a single overcurrent condition. In addition to the two modes of
operation, the PDIUSBH12 can also be configured to take either a 48 MHz crystal oscillator (for backward compatibility to PDIUSBH11) or a 12
MHz crystal.
The internal 4X clock multiplier PLL will be activated when 12 MHz input XTAL mode is selected. Also, the output clock frequency is now
programmable rather than fixed to 12 MHz. The output clock frequency can be programmed through the Set Mode command. All these new
features are added while maintaining backward compatibility to the PDIUSBH11 through TEST2 and TEST1 pins.
INPUT XTAL FREQUENCY
(MHz)
OUTPUT CLOCK FREQUENCY
(AT REST)
TEST2 TEST1
MODE
MODE 0
(GoodLink )
00
01
10
11
48
12
12
48
12MHz
4 MHz
4 MHz
12 MHz
MODE 0
(GoodLink )
MODE 1
(Individual Overcurrent)
MODE 1
(Individual Overcurrent)
NOTE:
1. Pin TEST3 should always be connected to Ground at all times.
Pin configuration
TEST1
TEST2
1
2
28 UP_DM
27 UP_DP
TEST3
3
26 AV
CC
RESET_N
GND
4
25 AGND
24 DN2_DM
23 DN2_DP
22 DN3_DM
21 DN3_DP
20 GND
5
XTAL1
6
XTAL2
7
CLKOUT
8
V
9
CC
OCURRENT_N /
OCURRENT2_N
10
19 SCL
SWITCH_N 11
SUSPEND 12
DN2_GL_N 13
18 SDA
17 INT_N
16 RSVD
15 RSVD
DN3_GL_N /
14
OCURRENT3_N
SV01751
NOTE:
Pin 10 and Pin 14 show alternative pin functions, depending on
mode of operation (Mode 0 or Mode 1) as described in
Pin Description.
6
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Pin description (MODE 0 – Good Link )
PIN NO.
PIN SYMBOL
TYPE
DRIVE
DESCRIPTION
Connect to Ground for 48MHz crystal input.
1
TEST1
Input
Connect to V for 12MHz crystal input.
CC
2
3
4
5
6
7
8
9
TEST2
TEST3
RESET_N
GND
Input
Input
Connect to Ground
Connect to Ground
Power-on reset
Input
ST
Power
Input
Ground reference
XTAL1
Crystal connection 1 (48 or 12MHz depending on TEST1 pin)
Crystal connection 2 (48 or 12MHz depending on TEST1 pin)
Programmable output clock for external devices
Voltage supply 3.3V ± 0.3V
XTAL2
Output
Output
Power
CLKOUT
3mA
ST
V
CC
Over-current notice to the device. This pin is also used to sense the USB VBUS.
A LOW on this pin of less than 2 seconds is interpreted as an overcurrent notice;
longer than 2 seconds is interpreted as loss of VBUS.
10
OCURRENT_N
Input
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SWITCH_N
SUSPEND
DN2_GL_N
DN3_GL_N
RSVD
Output
Output
Output
Output
Input
Input
Output
I/O
OD6
OD6
OD6
OD6
Enables power to downstream ports
Device is in suspended state
Downstream port 2 GoodLink LED indicator
Downstream port 3 GoodLink LED indicator
Reserved. Connect to GND for normal operation.
Reserved. Connect to GND for normal operation.
Connect to microcontroller interrupt
RSVD
INT_N
OD6
OD6
OD6
2
SDA
I C bi-directional data
2
SCL
I/O
I C bit-clock
GND
Power
AI/O
Ground reference
+
DN3_DP
DN3_DM
DN2_DP
DN2_DM
AGND
Downstream port 3 D connection
–
AI/O
Downstream port 3 D connection
+
AI/O
Downstream port 2 D connection
-
AI/O
Downstream port 2 D connection
Power
Power
AI/O
Analog Ground reference
AV
Analog voltage supply 3.3V ± 0.3V
CC
+
UP_DP
UP_DM
Upstream D connection
-
AI/O
Upstream D connection
NOTE:
1. Signals ending in _N indicate active low signals.
ST: Schmitt Trigger
OD6: Open Drain with 6 mA drive
AI/O: Analog I/O
7
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Product specification
USB 2-port hub
PDIUSBH12
Pin description (MODE 1 – Individual Overcurrent)
PIN NO
PIN SYMBOL
TYPE
DRIVE
DESCRIPTION
Connect to V for 48MHz crystal input.
Connect to Ground for 12MHz crystal input.
CC
1
TEST1
Input
2
3
4
5
6
7
8
9
TEST2
TEST3
RESET_N
GND
Input
Input
Connect to V
CC
Connect to Ground
Power-on reset
Input
ST
Power
Input
Ground reference
XTAL1
Crystal connection 1 (48 or 12MHz depending on TEST1 pin)
Crystal connection 2 (48 or 12MHz depending on TEST1 pin)
Programmable output clock for external devices
Voltage supply 3.3V ± 0.3V
XTAL2
Output
Output
Power
CLKOUT
3mA
ST
V
CC
Downstream port 2 over-current notice. This pin is also use to sense the USB
VBUS. A LOW on this pin of less than 2 seconds is interpreted as an overcurrent
notice; longer than 2 seconds is interpreted as loss of VBUS.
10
OCURRENT2_N
Input
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SWITCH_N
SUSPEND
DN2_GL_N
OCURRENT3_N
RSVD
Output
Output
Output
Input
Input
Input
Output
I/O
OD6
OD6
OD6
ST
Enables power to downstream ports
Device is in suspended state
Downstream port 2 GoodLink LED indicator
Downstream port 3 over-current notice
Reserved. Connect to GND for normal operation.
Reserved. Connect to GND for normal operation.
Connect to microcontroller interrupt
RSVD
INT_N
OD6
OD6
OD6
2
SDA
I C bi-directional data
2
SCL
I/O
I C bit-clock
GND
Power
AI/O
Ground reference
+
DN3_DP
DN3_DM
DN2_DP
DN2_DM
AGND
Downstream port 3 D connection
–
AI/O
Downstream port 3 D connection
+
AI/O
Downstream port 2 D connection
-
AI/O
Downstream port 2 D connection
Power
Power
AI/O
Analog Ground reference
AV
Analog voltage supply 3.3V ± 0.3V
CC
+
UP_DP
UP_DM
Upstream D connection
-
AI/O
Upstream D connection
NOTE:
1. Signals ending in _N indicate active low signals.
ST: Schmitt Trigger
OD6: Open Drain with 6 mA drive
AI/O: Analog I/O
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
APPLICATION DIAGRAM
USB
UPSTREAM
3.3V
CLKOUT
12MHz
2
I C
µC
H12
USB
DOWNSTREAM
5V
SWITCHED
5V
POWER SWITCH
AND
OVERCURRENT CIRCUIT
GOODLINK LED
SV00853
2
I C Interface
ADDRESS TABLE
2
The I C bus is used to interface to an external microcontroller
needed to control the operation of the hub. For cost consideration,
the target system microcontroller can be shared and utilized for this
PHYSICAL ADDRESS
(MSB to LSB)
TYPE OF ADDRESS
Command
Data
0011 011 (binary)
0011 010 (binary)
2
purpose. The PDIUSBH12 implements a slave I C interface. When
the PDIUSBH12 needs to communicate with the microcontroller it
asserts an interrupt signal. The microcontroller services this interrupt
by reading the appropriate status register on the PDIUSBH12
through the I C bus. (For more information about the I C serial bus,
refer to the I C Handbook, Philips order number 9397 750 00013).
Protocol
2
2
2
An I C transaction starts with a ‘Start Condition’, followed by an
address. When the address matches either the command or data
address the transaction starts and runs until a ‘Stop Condition’ or
another ‘Start Condition’ (repeated start) occurs.
2
2
The I C interface on the PDIUSBH12 defines two types of
transactions:
1. command transaction
The command address is write-only and is unable to do a read. The
next bytes in the message are interpreted as commands. Several
command bytes can be sent after one command address. Each of
the command bytes is acknowledged and passed on to the Memory
Management Unit inside the PDIUSBH12.
A command transaction is used to define which data (e.g., status
byte, buffer data, ...) will be read from / written to the USB
interface in the next data transaction. A data transaction usually
follows a command transaction.
2. data transaction
When the start condition address matches the data address, the
next bytes are interpreted as data. When the RW bit in the address
indicates a ‘master writes data to slave’ (=‘0’) the bytes are received,
acknowledged and passed on to the Memory Management Unit. If
the RW bit in the address indicates a ‘master reads data from slave’
A data transaction reads data from / writes data to the USB
interface. The meaning of the data is dependent on the
command transaction which was sent before the data
transaction.
2
(=‘1’) the PDIUSBH12 will send data to the master. The I C-master
Two addresses are used to differentiate between command and
data transactions. Writing to the command address is interpreted as
a command, while reading from / writing to the data address is used
to transfer data between the PDIUSBH12 and the controller.
must acknowledge all data bytes except the last one. In this way the
2
I C interface knows when the last byte has been transmitted and it
then releases the SDA line so that the master controller can
generate the STOP condition.
Repeated start support allows another packet to be sent without
generating a Stop Condition.
Timing
2
The I C interface in the PDIUSBH12 can support clock speeds up to
1MHz.
9
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Product specification
USB 2-port hub
PDIUSBH12
COMMAND SUMMARY
Some commands have the same command code (e.g., Read Buffer and Write Buffer). In these cases, the direction of the Data Phase (read or
write) indicates which command is executed.
COMMAND NAME
RECIPIENT
Initialization Commands
CODING
DATA PHASE
Set Address / Enable
Hub
D0h
D1h
D2h
D3h
D8h
F3h
Write 1 byte
Write 1 byte
Write 1 byte
Write 1 byte
Write 1 byte
Write 2 bytes
Embedded Function 1
Embedded Function 6
Embedded Function 7
Hub + Embedded Functions
Hub + Embedded Functions
Set Endpoint Enable
Set Mode
Data Flow Commands
Read Interrupt Register
Select Endpoint
F4h
Read 2 bytes
Read 1 byte (optional)
Read 1 byte (optional)
Read 1 byte (optional)
Read 1 byte
Read 1 byte
Read 1 byte
Read 1 byte
Read 1 byte
Read 1 byte
Read n bytes
Write n bytes
Write 1 byte
Write 1 byte
Write 1 byte
None
Hub Control OUT
Hub Control IN
00h
01h
Other Endpoints
Hub Control OUT
Hub Control IN
00h + Endpoint Index
Read Last Transaction Status
Read Endpoint Status
40h
41h
Other Endpoints
Hub Control OUT
Hub Control IN
40h + Endpoint Index
80h
81h
Other Endpoints
Selected Endpoint
Selected Endpoint
Hub Control OUT
Hub Control IN
80h + Endpoint Index
Read Buffer
Write Buffer
F0h
F0h
Set Endpoint Status
40h
41h
Other Endpoints
Selected Endpoint
Selected Endpoint
Selected Endpoint
40h + Endpoint Index
Acknowledge Setup
Clear Buffer
F1h
F2h
FAh
None
Validate Buffer
None
Hub Commands
Clear Port Feature
Set Port Feature
Port 2
Port 3
Port 2
Port 3
Port 2
Port 3
E0h
E1h
E8h
E9h
E0h
E1h
F7h
Write 1 byte
Write 1 byte
Write 1 byte
Write 1 byte
Get Port Status
Read 1 or 2 bytes
Read 1 or 2 bytes
Write 1 byte
Set Status Change Bits
General Commands
Send Resume
F6h
F5h
None
Read Current Frame Number
Read 1 or 2 bytes
10
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
COMMAND DESCRIPTIONS
Set Endpoint Enable
Command
Data
: D8h
Command Procedure
There are four basic types of commands: Initialization, Data, Hub
Specific, and General commands. Respectively, these are used to
initialize the hub and embedded function; for data flow between the
hub, embedded function, and the host; some hub specific
commands for controlling individual downstream ports; and some
general commands.
: Write 1 byte
The hub’s interrupt endpoint and the embedded functions generic
endpoints can only be enabled when the corresponding hub/function
is enabled via the Set Address/Enable command.
7
X
6
X
5
X
4
X
3
0
2
0
1
0
0
0
Initialization Commands
POWER ON VALUE
Initialization commands are used during the enumeration process of
the USB network. These commands are used to enable the hub and
embedded function endpoints. They are also used to set the USB
assigned address.
HUB’S INTERRUPT ENDPOINT
EMBEDDED FUNCTION 1 GENERIC ENDPOINTS
EMBEDDED FUNCTION 6 GENERIC ENDPOINTS
EMBEDDED FUNCTION 7 GENERIC ENDPOINTS
Set Address / Enable
RESERVED
SV00841
Command
: D0h (Hub), D1h, D2h, D3h,
(Embedded Functions)
Hub’s Interrupt Endpoint
A value of ‘1’ indicates
the hub’s interrupt
Data
: Write 1 byte
endpoint is enabled.
This command is used to set the USB assigned address and enable
the hub or embedded functions respectively. The hub powers up
enabled and needs not be enabled by the firmware at power up
initialization.
Embedded Function 1 Generic Endpoint
Embedded Function 6 Generic Endpoint
Embedded Function 7 Generic Endpoint
A value of ‘1’ indicates
the embedded function
1 generic endpoints are
enabled.
A value of ‘1’ indicates
the embedded function
6 generic endpoints are
enabled.
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POWER ON VALUE
ADDRESS
ENABLE
A value of ‘1’ indicates
the embedded function
7 generic endpoints are
enabled.
SV00825
Address
Enable
The value written becomes the address.
A ‘1’ enables this function.
Set Mode
Command
Data
: F3h
: Write 2 bytes
The Set Mode command is followed by two data writes. The first
byte contains the configuration byte values. The second byte is the
clock division factor byte.
11
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Connect Downstream Resistors A ‘1’ indicates that downstream
resistors are connected. A ‘0’
Configuration Byte
7
1
6
0
5
0
4
0
3
1
2
1
1
0
0
1
means that downstream resistors
are not connected. The
POWER ON VALUE
programmed value will not be
changed by a bus reset.
REMOTE WAKEUP
NO LAZYCLOCK
Non-blinking LEDs
A ‘1’ indicates that GoodLink
LEDs will NOT blink when there is
traffic. Leave this bit at ‘0’ to
achieve blinking LEDs. The
programmed value will not be
changed by a bus reset.
CLOCK RUNNING
DEBUG MODE
SoftConnect
CONNECT DOWNSTREAM RESISTORS
NON-BLINKING LEDs
EMBEDDED FUNCTION MODE
SV00842
Embedded Function Mode
A ‘1’ indicates single embedded
function mode. A ‘0’ indicates
multiple (3) embedded function
mode. See endpoint descriptions
for details. The programmed value
will not be changed by a bus
reset.
Remote Wakeup
No LazyClock
A ‘1’ indicates that a remote
wakeup feature is ON. Bus reset
will set this bit to ‘1’.
A ‘1’ indicates that CLKOUT will
not switch to LazyClock. A ‘0’
indicates that the CLKOUT
switches to LazyClock 1ms after
the Suspend pin goes high.
LazyClock frequency is 30KHz (±
40%). The programmed value will
not be changed by a bus reset.
Clock Division Factor Byte
7
X
6
X
5
0
4
0
3
0
2
0
1
1
0
1
POWER ON VALUE FOR 48MHz INPUT
POWER ON VALUE FOR 12MHz INPUT
X
X
1
1
1
0
1
1
Clock Running
A ‘1’ indicates that the internal
clocks and PLL are always
running even during Suspend
state. A ‘0’ indicates that the
internal clock, crystal oscillator
and PLL are stopped whenever
not needed. To meet the strict
Suspend current requirement, this
bit needs to be set to ‘0’. The
programmed value will not be
changed by a bus reset.
CLOCK DIVISION FACTOR
RESERVED
SV00843
Clock Division Factor
The value indicates clock division
factor for CLKOUT. The output
frequency is 48 MHz/(N+1) where
N is the Clock Division Factor. The
reset value is 3. This will give a
default output frequency at
CLKOUT pin of 12 MHz, thus
maintaining backward
Debug Mode
SoftConnect
A ‘1’ indicates that all errors and
“NAKing” are reported and a ‘0’
indicates that only OK and
babbling are reported. The
programmed value will not be
changed by a bus reset.
compatibility to the PDIUSBH11.
When the 12 MHz input crystal
frequency is selected, the reset
value is 11. This will produce the
lowest output frequency of 4 MHz
which can then be programmed
up by the user. The PDIUSBH12
design ensures no glitching during
frequency change. The
A ‘1’ indicates that the upstream
pull-up resistor will be connected if
VBUS is available. A ‘0’ means
that the upstream resistor will not
be connected. The programmed
value will not be changed by a bus
reset.
programmed value will not be
changed by a bus reset.
12
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Data Flow Commands
Select Endpoint
Command
Data
Data flow commands are used to manage the data transmission
between the USB endpoints and the monitor. Much of the data flow
is initiated via an interrupt to the microcontroller. The microcontroller
utilizes these commands to access and determine whether the
endpoint FIFOs have valid data.
: 00-0Dh
: Optional Read 1 byte
The Select Endpoint command initializes an internal pointer to the
start of the Selected buffer. Optionally, this command can be
followed by a data read, which returns ‘0’ if the buffer is empty and
‘1’ if the buffer is full.
Read Interrupt Register
Command
Data
: F4h
: Read 2 bytes
7
X
6
X
5
X
4
X
3
X
2
X
1
X
0
0
POWER ON VALUE
Interrupt Register Byte 1
FULL/EMPTY
RESERVED
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POWER ON VALUE
ENDPOINT INDEX 0 (HUB CONTROL OUT)
ENDPOINT INDEX 1 (HUB CONTROL IN)
ENDPOINT INDEX 2
SV00831
Full/Empty
A ‘1’ indicates the buffer is full, ‘0’
indicates an empty buffer.
ENDPOINT INDEX 3
ENDPOINT INDEX 4
ENDPOINT INDEX 5
Read Last Transaction Status
ENDPOINT INDEX 6
Command
Data
: 40–4Dh
ENDPOINT INDEX 7
SV00844
: Read 1 byte
The Read Last Transaction Status command is followed by one data
read that returns the status of the last transaction of the endpoint.
This command also resets the corresponding interrupt flag in the
interrupt register, and clears the status, indicating that it was read.
Interrupt Register Byte 2
7
6
0
5
0
4
0
3
0
2
0
1
0
0
0
X
POWER ON VALUE
This command is useful for debugging purposes. Since it keeps
track of every transaction, the status information is overwritten for
each new transaction.
ENDPOINT INDEX 8
ENDPOINT INDEX 9
ENDPOINT INDEX 10
ENDPOINT INDEX 11
ENDPOINT INDEX 12
ENDPOINT INDEX 13
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POWER ON VALUE
DATA RECEIVE/TRANSMIT SUCCESS
ERROR CODE (SEE TABLE)
BUS RESET
RESERVED
SV00845
SETUP PACKET
DATA 0/1 PACKET
This command indicates the origin of an interrupt. A ‘1’ indicates an
interrupt occurred at this endpoint. The bits are cleared by reading
the endpoint status register through Read Endpoint Status
command.
PREVIOUS STATUS NOT READ
SV00832
Data Receive/Transmit Success
A ‘1’ indicates data has been
received or transmitted
successfully.
After a bus reset an interrupt will be generated and bit 6 of the
Interrupt Register Byte 2 will be ‘1’. [In the PDIUSBH11, the bus
reset event is indicated by the absence of a ‘1’ in any bit of the
Interrupt Register. Note that the backward compatibility is still
maintained because in the PDIUSBH11, the Interrupt Register Byte
2 does not exist.]
Error Code
See Table 3, Error Codes.
Setup Packet
A ‘1’ indicates the last
successful received packet
had a SETUP token (this will
always read ‘0’ for IN buffers.
The bus reset interrupt is internally cleared by reading the interrupt
register. A bus reset is completely identical to the hardware reset
through the RESET_N pin with the sole difference of interrupt
notification.
Data 0/1 Packet
A ‘1’ indicates the last
successful received or sent
packet had a DATA1 PID.
The hub interrupt endpoint is handled internally by the PDIUSBH12
hardware without the need of microcontroller intervention.
Previous Status not Read
A ‘1’ indicates a second event
occurred before the previous
status was read.
13
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Table 3. Error codes
Read Buffer
Command
Data
ERROR
CODE
: F0h
: Read multiple bytes (max 10)
RESULT
0000
0001
No Error
PID encoding Error; bits 7–4 are not the inversion of
bits 3–0
The Read Buffer command is followed by a number of data reads,
which return the contents of the selected endpoint data buffer. After
each read, the internal buffer pointer is incremented by 1.
PID unknown; encoding is valid, but PID does not
exist
0010
0011
The buffer pointer is not reset to the buffer start by the Read Buffer
command. This means that reading or writing a buffer can be
interrupted by any other command (except for Select Endpoint), or
Unexpected packet; packet is not of the type expected
(= token, data or acknowledge), or SETUP token to a
non-control endpoint
2
can be done by more than one I C transaction (read the first 2 bytes
to get the number of data bytes, then read the rest in other
transactions).
0100
0101
0110
0111
1000
1001
Token CRC Error
Data CRC Error
The data in the buffer are organized as follows:
Time Out Error
• byte 0: Reserved: can have any value
• byte 1: Number/length of data bytes
• byte 2: Data byte 1
Babble Error
Unexpected End-of-packet
Sent or received NAK
• byte 3: Data byte 2
Sent Stall, a token was received, but the endpoint was
stalled
1010
Overflow Error, the received packet was longer than
the available buffer space
Write Buffer
1011
1101
1111
Command
Data
: F0h
Bitstuff Error
: Write multiple bytes (max 10)
Wrong DATA PID; the received DATA PID was not the
expected one
The Write Buffer command is followed by a number of data writes,
which load the endpoints buffer. The data must be organized in the
same way as described in the Read Buffer command. The first byte
(reserved) should always be 0. As in the Read Buffer command, the
Read Endpoint Status
2
data can be split up into different I C data transactions.
Command
Data
: 80–8Dh
WARNING:
: Read 1 byte
There is no protection against writing or reading over a buffer’s
boundary or against writing into an OUT buffer or reading from an IN
buffer. Any of these actions could cause an incorrect operation. Data
in an OUT buffer are only meaningful after a successful transaction.
7
X
6
X
5
0
4
0
3
0
2
0
1
X
0
X
POWER ON VALUE
RESERVED
Clear Buffer
SETUP PACKET
STALL
Command
Data
: F2h
DATA 0/1 PACKET
BUFFER FULL
: None
RESERVED
SV00833
When a packet is received completely, an internal endpoint buffer
full flag is set. All subsequent packets will be refused by returning a
NAK. When the microcontroller has read the data, it should free the
buffer by the Clear Buffer command. When the buffer is cleared new
packets will be accepted.
Setup Packet
STALL
A ‘1’ indicates the last received
packet had a SETUP token.
A ‘1’ indicates the endpoint is
stalled.
Validate Buffer
Data 0/1 Packet
Buffer Full
A ‘1’ indicates if the last received
or sent packet had a DATA1 PID.
Command
Data
: FAh
: None
A ‘1’ indicates that the buffer is
full.
When the microprocessor has written data into an IN buffer, it should
set the buffer full flag by the Validate Buffer command. This indicates
that the data in the buffer are valid and can be sent to the host when
the next IN token is received.
14
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Set Endpoint Status
Hub Commands
Hub commands are used to report connectivity and power status
between the hub and the host. These commands allow the host to
enable each port individually and get any change of status such as
new connectivity information.
Command
Data
: 40–4Dh
: Write 1 byte
A stalled control endpoint is automatically unstalled when it receives
a SETUP token, regardless of the content of the packet. If the
endpoint should stay in its stalled state, the microcontroller can
re-stall it.
Clear/Set Port Feature
Command
Data
: E0–E1h (Clear) and E8h–E9h (Set)
: Write 1 byte
When a stalled endpoint is unstalled (either by the Set Endpoint
Status command or by receiving a SETUP token), it is also
re-initialized. This flushes the buffer and if it is an OUT buffer it waits
for a DATA 0 PID, if it is an IN buffer it writes a DATA 0 PID.
The data written in the data phase is the feature code described in
Table 4.
When the controller receives a Set Feature or a Clear Feature
request, there are two possibilities:
Even when unstalled, writing Set Endpoint Status to ‘0’ initializes the
endpoint.
The request applies to port 1, the embedded port. In this case the
request should be handled internally by the controller.
7
X
6
X
5
X
4
X
3
X
2
X
1
X
0
0
If the request applies to ports 2 and 3, the controller should translate
the request into a Set Feature or Clear Feature command towards
the PDIUSBH12.
POWER ON VALUE
STALLED
RESERVED
When the PDIUSBH12 is configured in mode 0, there is only one
power switch output and one overcurrent input. This means that the
F_PORT_POWER and C_PORT_OVERCURRENT features are not
port specific. For these features, any of the Set / Clear Feature
commands can be used. The specific port assignment is ignored.
SV00834
Stalled
A ‘1’ indicates the endpoint is stalled.
When the PDIUSBH12 is configured in mode 1, there is still only one
power switch output but there are two individual overcurrent input
pins corresponding to each port. This means that the
F_PORT_POWER feature is port specific and the
C_PORT_OVERCURRENT feature is not port specific.
Acknowledge Setup
Command
Data
: F1h
: None
Setting the F_PORT_POWER feature turns the power on when it is
off and turns the overcurrent detection on only when the power is
already on. This allows it to have a short period of overcurrent
condition at the moment that power is switched on. For this reason,
the F_PORT_POWER feature needs to be set twice. Clearing this
feature turns both the power and the overcurrent detection off.
The arrival of a SETUP packet flushes the IN buffer and disables the
Validate Buffer and Clear Buffer commands for both IN and OUT
endpoints.
The microcontroller needs to re-enable these commands by the
Acknowledge Setup command. This ensures that the last SETUP
packet stays in the buffer and no packet can be sent back to the
host until the microcontroller has acknowledged explicitly that it has
seen the SETUP packet.
The microcontroller must send the Acknowledge Setup command to
both the IN and OUT endpoints.
Table 4.
FEATURE
F_PORT_ENABLE
FEATURE CODE
SET
CLEAR
Disables a port
0
1
2
3
4
5
6
7
Enables a port
F_PORT_SUSPEND
FC_PORT_RESET
Suspends a port
Resumes a port
Resets a port
Clears a port Reset Change bit
Unpowers all ports
F_PORT_POWER
Powers all ports
C_PORT_CONNECTION
C_PORT_ENABLE
–
–
–
–
Clears a port Connection Change bit
Clears a port Enable Change bit
Clears a port Suspend Change bit
Clears a port (Mode 1) or hub (Mode 0) Overcurrent Change bit
C_PORT_SUSPEND
C_PORT_OVERCURRENT
15
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Port Status Change Byte
Get Port Status
The description for the Port Status Change Byte is similar to the Port
Status Byte except that the value of the bits are ‘1’ only when a
change has occurred.
Command
Data
: E0h–E1h
: Read 1 or 2 bytes
7
X
6
X
5
X
4
0
3
0
2
0
1
0
0
0
The Get Port Status Command can be followed by one or two data
reads. The first byte returned contains the port status. The second
byte returned is the port status change byte.
POWER ON VALUE
CONNECT
ENABLED
Port Status Byte
SUSPEND
OVERCURRENT
RESET
7
X
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POWER ON VALUE
CONNECT
ENABLED
RESERVED
SV00847
SUSPEND
OVERCURRENT
RESET
Set Status Change Bits
POWER
LOW SPEED
RESERVED
SV00846
Command
Data
: F7h
: Write 1 byte
Connect
A ‘1’ indicates that a device is connected on
this port of the hub.
For assembling the hub’s status change register, the device needs
some additional information from the controller, i.e. the Local Power
Status Change bit and the embedded function Status Change bit.
Enabled
A ‘1’ indicates that this port is enabled.
A ‘1’ indicates that this port is suspended.
These are provided by the Set Status Change Bits command. This
command is always followed by one data write which contains the
Local Power Status Change bit at the LSB and the embedded
function Status Change bit at position 1. All other bits should be 0.
Suspend
OverCurrent
A ‘1’ indicates that overcurrent condition
exists on this port. In mode 0 of operation,
this bit is the same for all ports. In mode 1,
individual port overcurrent indication is
possible.
7
X
6
X
5
X
4
X
3
0
2
0
1
0
0
0
POWER ON VALUE
LOCAL POWER
Reset
Power
A ‘1’ indicates that bus reset on this port is in
progress. When reset is completed (nominal
duration of 10 ms), this bit indicates a ‘0’.
EMBEDDED FUNCTION 1
EMBEDDED FUNCTION 6
EMBEDDED FUNCTION 7
RESERVED
A ‘1’ indicates that power is supplied to
downstream ports. Since the PDIUSBH12
supports gang mode power switching, this
bit is the same for all ports.
SV00848
Low Speed
A ‘1’ indicates that low speed device is
connected to this port. This bit is only valid
when Connect bit is a ‘1’.
16
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
General Commands
Host Requests
SetFeature PORT_RESET
Send Resume
Reinitialize the embedded function and set the Reset Change bit to
indicate that the reset has completed. Reset the Enable Status bit,
enable the embedded function and set its address to ‘0’ by the Set
embedded function Address / Enable command. Disable the
embedded function interrupt endpoint by the Set Endpoint Enable
command.
Command
Data
: F6h
: None
Sends an upstream resume signal for 10 ms. This command is
normally issued when the device is in suspend. The RESUME
command is not followed by a data read or write.
SetFeature PORT_ENABLE
The PDIUSBH12 automatically sends a RESUME command when
an event occurs downstream.
Enable the function by the Set embedded function Address/Enable
command. Set the Enable Status bit.
Read Current Frame Number
SetFeature PORT_SUSPEND
Command
Data
: F5h
Disable the function by the Set embedded function Address/Enable
command. Reset the Enable Status bit and set the Suspend Status
bit.
: Read One or Two Bytes
This command is followed by one or two data reads and returns the
frame number of the last successfully received SOF. The frame
number is returned Least Significant Byte first.
ClearFeature PORT_ENABLE
Disable the function by the Set embedded function Address / Enable
command. Reset the Enable Status bit.
ClearFeature PORT_SUSPEND
7
6
5
4
3
2
1
0
X
X
X
X
X
X
X
X
LEAST SIGNIFICANT BYTE
Enable the function by the Set embedded function Address / Enable
command. Set the Enable Status bit, reset the Suspend Status bit;
set the Resume Status Change bit to indicate that the resume has
completed.
7
X
6
X
5
X
4
X
3
X
2
X
1
X
0
X
MOST SIGNIFICANT BYTE
SV00835
ClearFeature any Change Indicator
Clear the corresponding status change bit.
Embedded Function
Babbling condition
The USB host sees no difference between the embedded function
and a function connected to one of the downstream ports. Some of
the port commands sent by the host must be handled appropriately
by the embedded function to appear as any other downstream port.
When the embedded function causes a babbling condition, the
function is automatically disabled by the PDIUSBH12. As soon as
the microcontroller detects the babbling error, it must set the Enable
Status Change bit and reset the Enable Status bit.
The microcontroller maintains a series of status and status change
bits for the embedded function as described in the Get Port Status
command section. From these bits, the Status Change bit for the
embedded function is derived (i.e. the port specific Status Change
bits). This Status Change bit is then provided to the PDIUSBH12 by
the Set Status Change Bits command.
Remote WakeUp
There are three scenarios when a remote wakeup can occur. The
following describes the course of actions for each of the cases:
1. The device is not suspended and the embedded port is
suspended:
Enable back the function by setting the enable bit in the Set
Address/Enable register and update the following status bits in
the microcontroller program: reset the Suspend Status bit, set
the Enable Status bit and set the Suspend Status Change bit.
2. The device is suspended and the embedded port is suspended:
Send an upstream Resume using the Send Resume command,
enable back the function by setting the enable bit in the Set
Address/Enable register and update the following status bits in
the microcontroller program: reset the Suspend Status bit, set
the Enable Status bit and set the Suspend Status Change bit.
3. The device is suspended and the embedded port is enabled:
Send an upstream resume using the Send Resume command.
17
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
DC supply voltage
TEST CONDITIONS
MIN
3.0
0
MAX
3.6
UNIT
V
V
CC
V
I
DC input voltage range
5.5
V
V
DC input voltage range for I/O
DC input voltage range for analog I/O
DC output voltage range
0
5.5
V
I/O
V
AI/O
0
V
CC
V
CC
V
V
0
V
O
T
amb
Operating ambient temperature range in free air
See DC and AC characteristics per device
–40
85
°C
1
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
+4.6
–50
UNIT
V
V
DC supply voltage
–0.5
CC
IK
I
DC input diode current
V < 0
mA
V
I
V
I
DC input voltage
Note 2
–0.5
–0.5
+5.5
V
I
DC input voltage range for I/O’s
DC output diode current
V
+ 0.5
CC
V
I/O
V
O
> V or V < 0
±50
+ 0.5
CC
mA
V
OK
CC
O
V
O
DC output voltage
Note 2
–0.5
V
I
DC output sink or source current for other pins
DC output sink or source current for D+/D– pins
V
= 0 to V
= 0 to V
±15
±50
mA
mA
mA
V
O
O
O
CC
CC
I
O
V
I
, I
DC V or GND current
±100
GND CC
CC
3
4
V
Electrostatic discharge voltage
Storage temperature range
Power dissipation per package
I
IL
< 1 µA
—
±4000
ESD
T
–60
+150
°C
STG
P
TOT
NOTES:
1. Stresses beyond those listed may cause damage to the device. These are stress ratings only and functional operation of the device at these
or any other conditions beyond those listed in the RECOMMENDED OPERATING CONDITIONS table is not implied. Exposure to absolute
maximum rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
3. Values are given for device only: in-circuit V
= ±8000 V.
ESD(MAX)
4. For open-drain pins V
= ±2000 V.
ESD(MAX)
18
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1999 Jul 22
Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
DC CHARACTERISTICS (Digital pins)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Levels
V
LOW level input voltage
0.6
V
V
V
V
V
IL
VIH
HIGH level input voltage
LOW to HIGH threshold voltage
HIGH to LOW threshold voltage
Hysteresis voltage
2.7
1.4
0.9
0.4
V
ST (Schmitt Trigger) pins
ST pins
1.9
1.5
0.7
TLH
THL
HYS
V
V
ST pins
Output Levels
V
V
I
I
= rated drive
= 20 µA
0.4
0.1
OL
V
LOW level output voltage
HIGH level output voltage
OL
OL
V
V
I
I
= rated drive
= 20 µA
2.4
OH
V
OH
V
– 0.1
OH
CC
Leakage Current
I
OFF state current
OD (Open Drain) pins
±1
µA
OZ
I
L
Input leakage current
±1
µA
Oscillator stopped and
I
S
Suspend current
15
µA
inputs to GND/V
CC
I
O
Operating current
02 ports operating
13
mA
DC CHARACTERISTICS (AI/O pins)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Leakage Current
I
LO
Hi-Z state data line leakage
0V < V < 3.3V
±10
µA
IN
Input Levels
1
V
Differential input sensitivity
|(D+) – (D–)|
0.2
0.8
0.8
V
V
V
DI
V
CM
Differential common mode range
Single-ended receiver threshold
Includes V range
2.5
2.0
DI
V
SE
Output Levels
V
V
Static output LOW
R of 1.5kΩ to 3.6V
0.3
3.6
V
V
OL
L
Static output HIGH
R of 15kΩ to GND
L
2.8
OH
Capacitance
C
Transceiver capacitance
Pin to GND
20
43
pF
IN
Output Resistance
2
Z
Driver output resistance
Steady state drive
28
Ω
DRV
Integrated Resistance
Z
PU
Z
PD
Pull-up resistance
Pull-down resistance
SoftConnect = ON
Pull-down = ON
1.1
11
1.9
19
kΩ
kΩ
NOTES:
1. D+ is the symbol for the USB positive data pin: UP_DP, DN2_DP, DN3_DP.
D– is the symbol for the USB negative data pin: UP_DM, DN2_DM, DN3_DM.
2. Includes external resistors of 22 W ± 1% each on D+ and D–.
LOAD FOR D+/D–
1.5kΩ IS INTERNAL
TEST POINT
22Ω
D. U. T.
C
= 50pF
L
15kΩ
SV00849
19
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1999 Jul 22
Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
AC CHARACTERISTICS (AI/O pins, FULL speed)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Driver characteristics
C = 50pF;
L
R
= 1.5kΩ on D+ to V
pu
CC
Transition Time:
t
t
Rise time
Fall time
4
4
20
20
ns
ns
r
Between 10% and 90%
(t /t )
f
t
Rise/fall time matching
90
110
2.0
%
V
RFM
r
f
V
Output signal crossover voltage
1.3
CRS
Driver Timings
t
Source EOP width
Figure 1
Figure 1
160
–2
175
5
ns
ns
EOPT
DEOP
t
Differential data to EOP transition skew
Receiver Timings
Receiver Data Jitter Tolerance
t
t
To next transition
For paired transitions
–18.5
–9
18.5
9
ns
ns
Characterized and not tested.
Guaranteed by design.
JR1
JR2
EOP Width at Receiver
Must reject as EOP
Must accept
t
t
Figure 1
40
82
ns
ns
EOPR1
EOPR2
Hub Timings
Full Speed downstream port.
t
Hub Differential Data Delay
Figure 2
Figure 2
Figure 3
Figure 3
40
3
ns
ns
ns
ns
HDD
t
Data bit width distortion after SOP
–5
0
SOP
t
Hub EOP Delay Relative to t
15
+15
EOPDR
HDD
t
Hub EOP Output Width Skew
–15
HESK
20
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
AC CHARACTERISTICS (AI/O pins, LOW speed)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
C = 50pF and 350pF;
L
Driver characteristics
R
= 1.5kΩ on D– to V
pu
CC
Transition Time
Between 10% and 90%
C = 50pF
75
75
ns
ns
ns
ns
%
V
L
t
Rise time
Fall time
lr
C = 350pF
L
300
C = 50pF
L
t
lf
C = 350pF
L
300
120
2.0
t
Rise/fall time matching
(t /t )
80
RFM
r
f
V
Output signal crossover voltage
1.3
LCRS
Driver Timings
t
Source EOP width
Figure 1
Figure 1
1.25
–40
1.50
100
µs
LEOPT
t
Differential data to EOP transition skew
ns
LDEOP
Receiver Timings
EOP Width at Receiver
t
t
Must reject as EOP
Must accept
330
675
ns
ns
LEOPR1
LEOPR2
Figure 1
Hub Timings
Low Speed downstream port.
t
Hub Differential Data Delay
Figure 2
Figure 2
Figure 3
Figure 3
300
45
ns
ns
ns
ns
LHDD
t
Data bit width distortion after SOP
–65
0
LSOP
t
Hub EOP Delay Relative to T
200
+300
LEOPDR
HDD
t
Hub EOP Output Width Skew
–300
LHESK
t
PERIOD
CROSSOVER POINT
EXTENDED
CROSSOVER POINT
DIFFERENTIAL
DATA LINES
SOURCE EOP WIDTH: t
EOPT
DIFFERENTIAL DATA TO
SEO/EOP SKEW
N * t
+ t
PERIOD
DEOP
RECEIVER EOP WIDTH: t
, t
EOPR1 EOPR2
SV00837
Figure 1. Differential data to EOP transition skew and EOP width
21
1999 Jul 22
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Product specification
USB 2-port hub
PDIUSBH12
V
V
DD
CROSSOVER
POINT
CROSSOVER
POINT
DOWNSTREAM
DIFFERENTIAL
DATA
UPSTREAM-
DIFFERENTIAL
DATA
SS
CROSSOVER
POINT
CROSSOVER
POINT
Hub Delay
Downstream
Hub Delay
Upstream
UPSTREAM
DIFFERENTIAL
DATA
DOWNSTREAM-
DIFFERENTIAL
DATA
t
t
HDD
HDD
V
SS
A. DOWNSTREAM HUB DELAY
B. UPSTREAM HUB DELAY
SOP DISTORTION
= t (SOP) – t (NEXT J)
HDD
t
SOP
HDD
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
AND t
t
LHDD
LSOP
SV00514
Figure 2. Hub Differential Data Delay and SOP distortion
V
DD
CROSSOVER
POINT
EXTENDED
DOWNSTREAM
PORT
CROSSOVER
POINT
EXTENDED
UPSTREAM-
DIFFERENTIAL
DATA
V
SS
t
t
t
t
EOP+
EOP–
EOP+
EOP–
CROSSOVER
POINT
EXTENDED
CROSSOVER
POINT
EXTENDED
UPSTREAM
END OF CABLE
DOWNSTREAM-
DIFFERENTIAL
DATA
V
SS
A. DOWNSTREAM EOP DELAY
B. UPSTREAM EOP DELAY
EOP DELAY
= t
t
EOPD
EOP–
EOP DELAY RELATIVE TO t
HDD
t
= t
– t
EOPDR
EOPD HDD
EOP SKEW
= t
t
– t
EOP–
HESK
EOP+
LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR:
, t , AND t
t
LEOPD LEOPDR
LHESK
SV00515
Figure 3. Hub EOP Delay and EOP Skew
22
1999 Jul 22
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Product specification
USB 2-port hub
PDIUSBH12
2
AC CHARACTERISTICS (I C pins)
All timing values are valid within the operating supply voltage and ambient temperature range and reference to V and V with an input voltage
IL
IH
swing of V and V
.
SS
DD
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
kHz
µs
f
t
SCL clock frequency
Bus free time
1000
SCL
0.5
BUF
t
t
Start condition set-up time
Start condition hold time
SCL LOW time
0.25
0.25
0.45
0.45
µs
SU;STA
µs
HD;STA
t
µs
LOW
t
SCL HIGH time
µs
HIGH
t
SCL and SDA rise time
SCL and SDA fall time
Data set-up time
0.3
0.1
µs
r
t
µs
f
t
100
0
ns
SU;DAT
HD;DAT
t
Data hold time
ns
t
t
SCL LOW to data out valid
0.4
µs
VD;DAT
Stop condition set-up time
0.25
µs
SU;STO
2
2
A detailed description of the I C-bus specification, with applications, is given in the brochure “The I C-bus and how to use it”. This brochure may
be ordered using the Philips order number 9398 393 40011.
STOP
CONDITION
(P)
BIT 7
MSB
(A7)
BIT 0
LSB
(R/W)
START
CONDITION
(S)
BIT 6
(A6)
ACKNOWLEDGE
(A)
PROTOCOL
t
t
t
HIGH
SU;STA
LOW
1/f
SCL
SCL
t
r
t
f
t
BUF
SDA
t
t
t
t
t
SU;STO
HD;STA
SU;DAT
HD;DAT
VD:DAT
SV00756
2
Figure 4. I C-bus timing diagram
23
1999 Jul 22
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Product specification
USB 2-port hub
PDIUSBH12
SO28: plastic small outline package; 28 leads; body width 7.5mm
SOT136-1
24
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
DIP28: plastic dual in-line package; 28 leads (600 mil)
SOT117-1
25
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
SOLDERING
Introduction
This text gives a very brief insight to a complex technology. A more
in-depth account of soldering ICs can be found in our “Data
Handbook IC26; Integrated Circuit Packages” (document order
number 9398 652 90011).
WAVE SOLDERING
Conventional single-wave soldering is not recommended for surface
mount devices (SMDs) or printed-circuit boards with a high
component density, as solder bridging and non-wetting can present
major problems.
There is no soldering method that is ideal for all IC packages. Wave
soldering is often preferred when through-hole and surface mount
components are mixed on one printed circuit board. However, wave
soldering is not always suitable for surface mount ICs, or for
printed-circuit boards with high population densities. In these
situations, reflow soldering is often used.
To overcome these problems, the double-wave soldering method
was specifically developed.
If wave soldering is used, the following conditions must be observed
for optimal results:
• Use a double-wave soldering method comprising a turbulent wave
Through-hole mount packages
with high upward pressure followed by a smooth laminar wave.
• For packages with leads on two sides and a pitch (e):
SOLDERING BY DIPPING OR BY SOLDER WAVE
–
–
larger than or equal to 1.27 mm, the footprint longitudinal axis
is preferred to be parallel to the transport direction of the
printed-circuit board;
The maximum permissible temperature of the solder is 260°C;
solder at this temperature must not be in contact with the joints for
more than 5 seconds. The total contact time of successive solder
waves must not exceed 5 seconds.
smaller than 1.27 mm, the footprint longitudinal axis must be
The device may be mounted up to the seating plane, but the
temperature of the plastic body must not exceed the specified
parallel to the transport direction of the printed-circuit board.
The footprint must incorporate solder thieves at the downstream
end.
maximum storage temperature (T ). If the printed-circuit board
stg(max)
has been pre-heated, forced cooling may be necessary immediately
after soldering to keep the temperature within the permissible limit.
• For packages with leads on four sides, the footprint must be
placed at a 45° angle to the transport direction of the
printed-circuit board. The footprint must incorporate solder thieves
downstream and at the side corners.
MANUAL SOLDERING
Apply the soldering iron (24 V or less) to the lead(s) of the package,
either below the seating plane or not more than 2 mm above it. If the
temperature of the soldering iron bit is less than 300°C, it may
remain in contact for up to 10 seconds. If the bit temperature is
between 300 and 400°C, contact may be made for up to 5 seconds.
During placement, and before soldering, the package must be fixed
with a droplet of adhesive. The adhesive can be applied by screen
printing, pin transfer or syringe dispensing. The package can be
soldered after the adhesive has cured.
Surface mount packages
Typical dwell time is 4 seconds at 250°C. A mildly-activated flux will
eliminate the need for removal of corrosive residues in most
applications.
REFLOW SOLDERING
Reflow soldering requires solder paste (a suspension of fine solder
particles, flux and binding agent) to be applied to the printed-circuit
board by screen printing, stencilling or pressure-syringe dispensing
before package placement.
MANUAL SOLDERING
Fix the component by first soldering two diagonally-opposite end
leads. Use a low-voltage (24 V or less) soldering iron applied to the
flat part of the lead. Contact time must be limited to 10 seconds at
up to 300°C.
Several methods exist for reflowing; for example, infrared/convection
heating in a conveyor-type oven. Throughput times (preheating,
soldering and cooling) vary between 100 and 200 seconds,
depending on heating method.
When using a dedicated tool, all other leads can be soldered in one
operation within 2 to 5 seconds between 270 and 320°C.
Typical reflow peak temperatures range from 215 250°C. The
top-surface temperature of the packages should preferably be kept
below 230°C.
26
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
SUITABILITY OF IC PACKAGES FOR WAVE, REFLOW AND DIPPING SOLDERING METHODS
Soldering Method
Mounting
Package
1
Wave
Reflow
Dipping
2
Through-hole mount
DBS, DIP, HDIP, SDIP, SIL
BGA, SQFP,
suitable
–
suitable
not suitable
suitable
suitable
suitable
suitable
suitable
–
–
–
–
–
3
HLQFP, HSQFP, HSOP, SMS
PLCC, SO, SOJ
not suitable
suitable
Surface mount
4, 5
6
LQFP, QFP, TQFP
not recommended
SSOP, TSSOP, VSO
not recommended
NOTES:
1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to
time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in
them (the so-called “popcorn” effect). For details, refer to the Drypack information in the “Data Handbook IC26; Integrated Circuit Packages;
Section: Packing Methods”.
2. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board.
3. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink (at bottom version)
cannot be achieved, and as solder may stick to the heatsink (on top version).
4. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction. The package footprint must
incorporate solder thieves downstream and at the side corners.
5. Wave soldering is only suitable for LQFP, QFP, and TQFP packages with a pitch (e) equal to or larger than 0.8 mm; it is definitely not
suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
6. Wave soldering is only suitable for SSOP and TSSOP packages with a pith (e) equal to or larger than 0.65 mm; it is definitely not suitable for
packages with a pitch (e) equal to or smaller than 0.5 mm.
27
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Philips Semiconductors
Product specification
USB 2-port hub
PDIUSBH12
Data sheet status
[1]
Data sheet
status
Product
status
Definition
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Righttomakechanges—PhilipsSemiconductorsreservestherighttomakechanges, withoutnotice, intheproducts, includingcircuits,standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Copyright Philips Electronics North America Corporation 1999
All rights reserved. Printed in U.S.A.
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Date of release: 07-99
Document order number:
9397 750 06221
Philips
Semiconductors
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