LAN9512
USB Hub with Integrated
10/100 Ethernet Controller
Datasheet
PRODUCT FEATURES
„
High-Performance 10/100 Ethernet Controller
Highlights
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—
—
—
—
—
—
—
—
—
Fully compliant with IEEE802.3/802.3u
Integrated Ethernet MAC and PHY
10BASE-T and 100BASE-TX support
Full- and half-duplex support with flow control
Preamble generation and removal
Automatic 32-bit CRC generation and checking
Automatic payload padding and pad removal
Loop-back modes
„
„
Two downstream ports, one upstream port
—
Two integrated downstream USB 2.0 PHYs
—
One integrated upstream USB 2.0 PHY
Integrated 10/100 Ethernet MAC with full-duplex
support
„
„
„
Integrated 10/100 Ethernet PHY with HP Auto-MDIX
Implements Reduced Power Operating Modes
Minimized BOM Cost
TCP/UDP checksum offload support
Flexible address filtering modes
–
–
–
–
–
–
One 48-bit perfect address
64 hash-filtered multicast addresses
Pass all multicast
Promiscuous mode
Inverse filtering
—
Single 25 MHz crystal (Eliminates cost of separate
crystals for USB and Ethernet)
—
Built-in Power-On-Reset (POR) circuit (Eliminates
requirement for external passive or active reset)
Pass all incoming with status report
Target Applications
—
—
Wakeup packet support
Integrated Ethernet PHY
„
„
„
„
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„
Desktop PCs
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–
–
–
Auto-negotiation
Automatic polarity detection and correction
HP Auto-MDIX
Notebook PCs
Printers
Energy Detect
Game Consoles
Embedded Systems
Docking Stations
„
Power and I/Os
—
—
—
—
—
Three PHY LEDs
Eight GPIOs
Supports bus-powered and self-powered operation
Internal 1.8v core supply regulator
External 3.3v I/O supply
Key Benefits
USB Hub
„
„
„
Miscellaneous features
—
Fully compliant with Universal Serial Bus Specification
Revision 2.0
HS (480 Mbps), FS (12 Mbps), and LS (1.5 Mbps)
compatible
Two downstream ports, one upstream port
Port mapping and disable support
Port Swap: Programmable USB diff-pair pin location
PHY Boost: Programmable USB signal drive strength
Select presence of a permanently hardwired USB
peripheral device on a port by port basis
Advanced power saving features
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—
—
Optional EEPROM
Optional 24MHz reference clock output for partner hub
IEEE 1149.1 (JTAG) Boundary Scan
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—
—
—
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Software
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—
—
—
—
Windows 2000/XP/Vista Driver
Linux Driver
Win CE Driver
MAC OS Driver
EEPROM Utility
—
—
„
„
Packaging
Downstream PHY goes into low power mode when port
power to the port is disabled
—
64-pin QFN, lead-free RoHS compliant
Environmental
—
Full Power Management with individual or ganged
power control of each downstream port.
Integrated USB termination Pull-up/Pull-down resistors
Internal short circuit protection of USB differential signal
pins
—
—
—
—
Commercial Temperature Range (0°C to +70°C)
±8kV HBM without External Protection Devices
±8kV contact mode (IEC61000-4-2)
—
—
±15kV air-gap discharge mode (IEC61000-4-2)
SMSC LAN9512
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USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Table of Contents
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ethernet Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
EEPROM Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 2 Pin Description and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Port Power Control Using a Poly Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 3 EEPROM Controller (EPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1.1 Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Chapter 4 Operational Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Equivalent Test Load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Chapter 5 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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USB Hub with Integrated 10/100 Ethernet Controller
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List of Figures
Figure 1.1 Internal Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2.1 LAN9512 64-QFN Pin Assignments (TOP VIEW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2.2 Port Power Control with USB Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 2.3 Port Power Control with Poly Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 2.4 Port Power with Ganged Control with Poly Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 4.1 Output Equivalent Test Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 4.1 EEPROM Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 5.1 LAN9512 64-QFN Package Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 5.2 LAN9512 Recommended PCB Land Pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
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USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
List of Tables
Table 2.1 EEPROM Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2.2 JTAG Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2.3 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2.4 USB Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 2.5 Ethernet PHY Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 2.6 I/O Power Pins, Core Power Pins, and Ground Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 2.7 No-Connect Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 2.8 64-QFN Package Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 2.9 Buffer Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 3.1 EEPROM Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 3.2 Configuration Flags Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 3.3 Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 3.4 Config Data Byte 1 Register (CFG1) Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 3.5 Config Data Byte 2 Register (CFG2) Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 3.6 Config Data Byte 3 Register (CFG3) Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 3.7 Boost_Up Register (BOOSTUP) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 3.8 Boost_3:2 Register (BOOST32) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 3.9 Status/Command Register (STCD) Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 3.10 EEPROM Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 3.12 EEPROM Example - 256 Byte EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 4.1 Operational Current Consumption & Power Dissipation (VDD33IO = VDD33A = 3.3V) . . . . . 39
Table 4.2 I/O Buffer Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 4.3 100BASE-TX Transceiver Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 4.4 10BASE-T Transceiver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 4.5 EEPROM Timing Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 4.6 LAN9512 Crystal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 5.1 LAN9512 64-QFN Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Chapter 1 Introduction
1.1
Block Diagram
LAN9512
TAP
EEPROM
EEPROM
JTAG
Controller
Controller
10/100
Ethernet
Controller
USB 2.0
Hub
USB
Upstream
USB PHY
Ethernet
PHY
Ethernet
DP/DM
Downstream
Downstream
USB PHY
USB PHY
USB
USB
DP/DM
DP/DM
Figure 1.1 Internal Block Diagram
1.1.1
Overview
The LAN9512 is a high performance Hi-Speed USB 2.0 hub with a 10/100 Ethernet controller. With
applications ranging from embedded systems, desktop PCs, notebook PCs, printers, game consoles,
and docking stations, the LAN9512 is targeted as a high performance, low cost USB/Ethernet and
USB/USB connectivity solution.
The LAN9512 contains an integrated USB 2.0 hub, two integrated downstream USB 2.0 PHYs, an
integrated upstream USB 2.0 PHY, a 10/100 Ethernet PHY, a 10/100 Ethernet Controller, a TAP
The LAN9512 hub provides over 30 programmable features, including:
PortMap (also referred to as port remap) which provides flexible port mapping and disabling
sequences. The downstream ports of the LAN9512 hub can be reordered or disabled in any sequence
to support multiple platform designs’ with minimum effort. For any port that is disabled, the LAN9512
automatically reorders the remaining ports to match the USB host controller’s port numbering scheme.
PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows
direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the
USB differential signals on the PCB.
PHYBoost which enables four programmable levels of USB signal drive strength in USB port
transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system
level variables such as poor PCB layout, long cables, etc..
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USB Hub with Integrated 10/100 Ethernet Controller
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1.1.2
USB Hub
The integrated USB hub is fully compliant with the USB 2.0 Specification and will attach to a USB host
as a Full-Speed Hub or as a Full-/High-Speed Hub. The hub supports Low-Speed, Full-Speed, and
High-Speed (if operating as a High-Speed hub) downstream devices on all of the enabled downstream
ports.
A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture
ensures maximum USB throughput for each connected device when operating with mixed-speed
peripherals.
The hub works with an external USB power distributed switch device to control V
downstream ports, and to limit current and sense over-current conditions.
switching to
BUS
All required resistors on the USB ports are integrated into the hub. This includes all series termination
resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The
over-current sense inputs for the downstream facing ports have internal pull-up resistors.
Two external ports are available for general USB device connectivity.
1.1.3
Ethernet Controller
The 10/100 Ethernet controller provides an integrated Ethernet MAC and PHY which are fully IEEE
802.3 10BASE-T and 802.3u 100BASE-TX compliant. The 10/100 Ethernet controller also supports
numerous power management wakeup features, including “Magic Packet”, “Wake on LAN” and “Link
Status Change”. These wakeup events can be programmed to initiate a USB remote wakeup.
The 10/100 Ethernet PHY integrates an IEEE 802.3 physical layer for twisted pair Ethernet
applications. The PHY block includes support for auto-negotiation, full or half-duplex configuration,
auto-polarity correction and Auto-MDIX. Minimal external components are required for the utilization of
the integrated PHY.
The Ethernet controller implements four USB endpoints: Control, Interrupt, Bulk-in, and Bulk-out. The
Bulk-in and Bulk-out Endpoints allow for Ethernet reception and transmission respectively.
Implementation of vendor-specific commands allows for efficient statistics gathering and access to the
Ethernet controller’s system control and status registers.
1.1.4
1.1.5
EEPROM Controller
The LAN9512 contains an EEPROM controller for connection to an external EEPROM. This allows for
the automatic loading of static configuration data upon power-on reset, pin reset, or software reset.
The EEPROM can be configured to load USB descriptors, USB device configuration, and the MAC
address.
Peripherals
The LAN9512 also contains a TAP controller, and provides three PHY LED indicators, as well as eight
general purpose I/O pins. All GPIOs can serve as remote wakeup events when LAN9512 is in a
suspended state.
The integrated IEEE 1149.1 compliant TAP controller provides boundary scan via JTAG.
1.1.6
Power Management
The LAN9512 features three variations of USB suspend: SUSPEND0, SUSPEND1, and SUSPEND2.
These modes allow the application to select the ideal balance of remote wakeup functionality and
power consumption.
„
SUSPEND0: Supports GPIO, “Wake On LAN”, and “Magic Packet” remote wakeup events. This
suspend state reduces power by stopping the clocks of the MAC and other internal modules.
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USB Hub with Integrated 10/100 Ethernet Controller
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„
„
SUSPEND1: Supports GPIO and “Link Status Change” for remote wakeup events. This suspend
state consumes less power than SUSPEND0.
SUSPEND2: Supports only GPIO assertion for a remote wakeup event. This is the default suspend
mode for the LAN9512.
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USB Hub with Integrated 10/100 Ethernet Controller
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Chapter 2 Pin Description and Configuration
49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VDD33A
TCK
50
EXRES
TDO
SMSC
LAN9512
51
VDD33A
TDI
52
53
54
55
56
57
58
59
60
61
62
63
64
64 PIN QFN
RXP
RXN
TMS
(TOP VIEW)
nTRST
VDD33A
TXP
VDD33IO
EEDI
EEDO
TXN
VDD33A
USBDM0
USBDP0
XO
VSS
EECS
EECLK
nSPD_LED/GPIO2
nLNKA_LED/GPIO1
nFDX_LED/GPIO0
VDD33IO
NC
XI
VDD18USBPLL
USBRBIAS
VDD33A
NC
NOTE: When HP Auto-MDIX is activated, the TXN/TXP pins can function as RXN/RXP and vice-versa
NOTE: Exposed pad (VSS) on bottom of package must be connected to ground
Figure 2.1 LAN9512 64-QFN Pin Assignments (TOP VIEW)
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Table 2.1 EEPROM Pins
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
EEPROM Data
In
EEDI
IS
(PD)
This pin is driven by the EEDO output of the
external EEPROM.
1
1
1
1
EEPROM Data
Out
EEDO
EECS
O8
O8
O8
This pin drives the EEDI input of the external
EEPROM.
EEPROM Chip
Select
This pin drives the chip select output of the external
EEPROM.
EEPROM Clock
EECLK
This pin drives the EEPROM clock of the external
EEPROM.
Table 2.2 JTAG Pins
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
JTAG Test Port
Reset
nTRST
IS
This active low pin functions as the JTAG test port
reset input.
1
Note:
This pin should be tied high if it is not
used.
JTAG Test
Mode Select
TMS
TDI
IS
IS
This pin functions as the JTAG test mode select.
This pin functions as the JTAG data input.
This pin functions as the JTAG data output.
1
1
1
JTAG Test Data
Input
JTAG Test Data
Out
TDO
TCK
O12
IS
JTAG Test
Clock
This pin functions as the JTAG test clock. The
maximum operating frequency of this clock is
25MHz.
1
Table 2.3 Miscellaneous Pins
BUFFER
NUM
PINS
NAME
SYMBOL
TYPE
DESCRIPTION
System Reset
nRESET
IS
This active low pin allows external hardware to
reset the device.
1
1
Note:
This pin should be tied high if it is not
used.
Ethernet
Full-Duplex
Indicator LED
nFDX_LED
GPIO0
OD12
(PU)
This pin is driven low (LED on) when the Ethernet
link is operating in full-duplex mode.
General
Purpose I/O 0
IS/O12/
OD12
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
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USB Hub with Integrated 10/100 Ethernet Controller
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Table 2.3 Miscellaneous Pins (continued)
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
Ethernet Link
ActivityIndicator
LED
nLNKA_LED
OD12
(PU)
This pin is driven low (LED on) when a valid link is
detected. This pin is pulsed high (LED off) for
80mS whenever transmit or receive activity is
detected. This pin is then driven low again for a
minimum of 80mS, after which time it will repeat
the process if TX or RX activity is detected.
Effectively, LED2 is activated solid for a link. When
transmit or receive activity is sensed, LED2 will
function as an activity indicator.
1
General
Purpose I/O 1
GPIO1
IS/O12/
OD12
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
Ethernet Speed
Indicator LED
nSPD_LED
OD12
(PU)
This pin is driven low (LED on) when the Ethernet
operating speed is 100Mbs, or during auto-
negotiation. This pin is driven high during 10Mbs
operation, or during line isolation.
1
General
Purpose I/O 2
GPIO2
GPIO3
IS/O12/
OD12
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
General
Purpose I/O 3
IS/O8/
OD8
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
1
1
1
1
1
General
Purpose I/O 4
GPIO4
IS/O8/
OD8
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
General
Purpose I/O 5
GPIO5
IS/O8/
OD8
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
General
Purpose I/O 6
GPIO6
IS/O8/
OD8
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
General
Purpose I/O 7
GPIO7
IS/O8/
OD8
(PU)
This General Purpose I/O pin is fully programmable
as either a push-pull output, an open-drain output,
or a Schmitt-triggered input.
Detect
Upstream
VBUS Power
VBUS_DET
IS_5V
This pin detects the state of the upstream bus
power. The Hub monitors VBUS_DET to determine
when to assert the USBDP0 pin's internal pull-up
resistor (signaling a connect event).
1
For bus powered hubs, this pin must be tied to
VDD33IO.
For self powered hubs, refer to the LAN9512
reference schematics.
Auto-MDIX
Enable
AUTOMDIX_EN
TEST1
IS
-
Determines the default Auto-MDIX setting.
1
1
0 = Auto-MDIX is disabled.
1 = Auto-MDIX is enabled.
Test 1
Used for factory testing, this pin must always be left
unconnected.
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USB Hub with Integrated 10/100 Ethernet Controller
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Table 2.3 Miscellaneous Pins (continued)
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
Test 2
TEST2
-
-
Used for factory testing, this pin must always be
connected to VSS for proper operation.
1
1
Test 3
TEST3
Used for factory testing, this pin must always be
connected to VDD33IO for proper operation.
24 MHz Clock
Enable
CLK24_EN
CLK24_OUT
TEST4
IS
08
-
This pin enables the generation of the 24 MHz
clock on the CLK_24_OUT pin.
1
1
24 MHz Clock
Test 4
This pin outputs a 24 MHz clock that can be used
a reference clock for a partner hub.
Used for factory testing, this pin must always be left
unconnected.
1
Table 2.4 USB Pins
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
Upstream
USBDM0
AIO
AIO
Upstream USB DPLUS signal.
1
1
USB DMINUS 0
Upstream
USB
DPLUS 0
USBDP0
Downstream
USBDM2
USBDP2
USBDM3
USBDP3
PRTCTL2
AIO
AIO
AIO
AIO
Downstream USB peripheral 2 DMINUS signal.
Downstream USB peripheral 3 DMINUS signal.
Downstream USB peripheral 3 DPLUS signal.
1
1
1
1
USB DMINUS 2
Downstream
USB DPLUS 2
Downstream
USB DMINUS 3
Downstream
USB DPLUS 3
USB Port Power
Control 2
IS/OD12 When used as an output, this pin enables power to
(PU)
downstream USB peripheral 2.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 2. An overcurrent
condition is indicated when the signal is low.
1
USB Port Power
Control 3
PRTCTL3
IS/OD12 When used as an output, this pin enables power to
(PU)
downstream USB peripheral 3.
When used as an input, this pin is used to sample
the output signal from an external current monitor
for downstream USB peripheral 3. An overcurrent
condition is indicated when the signal is low.
1
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Table 2.4 USB Pins (continued)
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
External USB
Bias Resistor
USBRBIAS
AI
Used for setting HS transmit current level and on-
chip termination impedance. Connect to an
external 12K 1.0% resistor to ground.
1
1
USB PLL +1.8V
Power Supply
VDD18USBPLL
XI
P
Refer to the LAN9512 reference schematics for
additional connection information.
Crystal Input
ICLK
External 25 MHz crystal input.
Note:
This pin can also be driven by a single-
ended clock oscillator. When this method
is used, XO should be left unconnected
1
1
Crystal Output
XO
OCLK
External 25 MHz crystal output.
Table 2.5 Ethernet PHY Pins
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
Ethernet TX
Data Out
Negative
TXN
AIO
AIO
AIO
Negative output of the Ethernet transmitter. The
transmit data outputs may be swapped internally
with receive data inputs when Auto-MDIX is
enabled.
1
1
Ethernet TX
Data Out
Positive
TXP
RXN
Positive output of the Ethernet transmitter. The
transmit data outputs may be swapped internally
with receive data inputs when Auto-MDIX is
enabled.
Ethernet RX
Data In
Negative
Negative input of the Ethernet receiver. The receive
data inputs may be swapped internally with
transmit data outputs when Auto-MDIX is enabled.
1
1
Ethernet RX
Data In Positive
RXP
AIO
P
Positive input of the Ethernet receiver. The receive
data inputs may be swapped internally with
transmit data outputs when Auto-MDIX is enabled.
+3.3V Analog
Power Supply
VDD33A
Refer to the LAN9512 reference schematics for
connection information.
7
1
1
External PHY
Bias Resistor
EXRES
AI
P
Used for the internal bias circuits. Connect to an
external 12.4K 1.0% resistor to ground.
Ethernet PLL
+1.8V Power
Supply
VDD18ETHPLL
Refer to the LAN9512 reference schematics for
additional connection information.
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Table 2.6 I/O Power Pins, Core Power Pins, and Ground Pad
NUM
PINS
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
+3.3V I/O
Power
VDD33IO
P
P
+3.3V Power Supply for I/O Pins.
Refer to the LAN9512 reference schematics for
connection information.
5
2
Digital Core
+1.8V Power
Supply Output
VDD18CORE
+1.8 V power from the internal core voltage
regulator. All VDD18CORE pins must be tied
together for proper operation.
Refer to the LAN9512 reference schematics for
connection information.
1
Ground
VSS
P
Ground
Table 2.7 No-Connect Pins
BUFFER
NUM
PINS
NAME
SYMBOL
TYPE
DESCRIPTION
No Connect
NC
-
These pins must be left floating for normal device
operation
6
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Table 2.8 64-QFN Package Pin Assignments
PIN
NUM
PIN
NUM
PIN
NUM
PIN
NUM
PIN NAME
PIN NAME
PIN NAME
PIN NAME
1
2
3
4
USBDM2
USBDP2
USBDM3
USBDP3
17
18
19
20
NC
NC
33
34
35
36
VDD33IO
TEST2
GPIO3
49
50
51
52
VDD33A
EXRES
VDD33A
RXP
VDD33IO
nFDX_LED/
GPIO0
GPIO4
5
6
VDD33A
NC
21
22
nLNKA_LED/
GPIO1
37
38
GPIO5
53
54
RXN
nSPD_LED/
GPIO2
VDD18CORE
VDD33A
7
8
NC
NC
23
24
EECLK
EECS
39
40
VDD33IO
TEST3
55
56
TXP
TXN
9
NC
25
26
27
28
29
30
31
EEDO
EEDI
41
42
43
44
45
46
47
AUTOMDIX_EN
GPIO6
57
58
59
60
61
62
63
VDD33A
USBDM0
USBDP0
XO
10
11
12
13
14
15
VDD33A
VBUS_DET
nRESET
VDD33IO
nTRST
TMS
GPIO7
CLK24_EN
CLK24_OUT
VDD33IO
TEST4
TEST1
XI
PRTCTL2
VDD18CORE
TDI
VDD18USBPLL
USBRBIAS
TDO
16
PRTCTL3
32
TCK
48
VDD18ETHPLL
64
VDD33A
EXPOSED PAD
MUST BE CONNECTED TO VSS
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2.1
Port Power Control
This section details the usage of the port power control pins PRTCTL[3:2].
2.1.1
Port Power Control Using a USB Power Switch
The LAN9512 has a single port power control and over-current sense signal for each downstream port.
When disabling port power the driver will actively drive a ‘0’. To avoid unnecessary power dissipation,
the internal pull-up resistor will be disabled at that time. When port power is enabled, the output driver
is disabled and the pull-up resistor is enabled, creating an open drain output. If there is an over-current
situation, the USB Power Switch will assert the open drain OCS signal. The schmitt trigger input will
recognize this situation as a low. The open drain output does not interfere. The overcurrent sense filter
handles the transient conditions, such as low voltage, while the device is powering up.
5V
PRTCTL3
OCS
USB Power
Switch
EN
USB
Device
LAN9512
5V
PRTCTL2
OCS
USB Power
Switch
EN
USB
Device
Figure 2.2 Port Power Control with USB Power Switch
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2.1.2
Port Power Control Using a Poly Fuse
disabling port power, the driver will drive a ‘0’. This procedure will have no effect since the external
diode will isolate the pin from the load. When port power is enabled, the output driver is disabled and
the pull-up resistor is enabled, which creates an open drain output. This means that the pull-up resistor
is providing 3.3 volts to the anode of the diode. If there is an over-current situation, the poly fuse will
open. This will cause the cathode of the diode to go to 0 volts. The anode of the diode will be at 0.7
volts, and the Schmidt trigger input will register this as a low, resulting in an overcurrent detection. The
open drain output does not interfere.
5V
Poly Fuse
PRTCTL3
USB
Device
LAN9512
5V
Poly Fuse
PRTCTL2
USB
Device
Figure 2.3 Port Power Control with Poly Fuse
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Many customers use a single poly fuse to power all their devices. For the ganged situation, all power
control pins must be tied together.
5V
Poly Fuse
PRTCTL3
PRTCTL2
LAN9512
USB
Device
USB
Device
Figure 2.4 Port Power with Ganged Control with Poly Fuse
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2.2
Buffer Types
Table 2.9 Buffer Types
DESCRIPTION
BUFFER TYPE
IS
IS_5V
O8
Schmitt-triggered Input
5V Tolerant Schmitt-triggered Input
Output with 8mA sink and 8mA source
Open-drain output with 8mA sink
OD8
O12
OD12
PU
Output with 12mA sink and 12mA source
Open-drain output with 12mA sink
50uA (typical) internal pull-up. Unless otherwise noted in the pin description, internal pull-
ups are always enabled.
Note:
Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on
internal resistors to drive signals external to LAN9512. When connected to a load
that must be pulled high, an external resistor must be added.
PD
50uA (typical) internal pull-down. Unless otherwise noted in the pin description, internal
pull-downs are always enabled.
Note:
Internal pull-down resistors prevent unconnected inputs from floating. Do not rely
on internal resistors to drive signals external to LAN9512. When connected to a
load that must be pulled low, an external resistor must be added.
AI
AIO
ICLK
OCLK
P
Analog input
Analog bi-directional
Crystal oscillator input pin
Crystal oscillator output pin
Power pin
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Chapter 3 EEPROM Controller (EPC)
LAN9512 may use an external EEPROM to store the default values for the USB descriptors and the
MAC address. The EEPROM controller supports most “93C46” type EEPROMs. A total of nine address
bits are used to support 256/512 byte EEPROMs.
Note: A 3-wire style 2K/4K EEPROM that is organized for 256/512 x 8-bit operation must be used.
The MAC address is used as the default Ethernet MAC address and is loaded into the MAC’s ADDRH
and ADDRL registers. If a properly configured EEPROM is not detected, it is the responsibility of the
Host LAN Driver to set the IEEE addresses.
After a system-level reset occurs, the device will load the default values from a properly configured
EEPROM. The device will not accept USB transactions from the Host until this process is completed.
The EEPROM controller also allows the Host system to read, write and erase the contents of the Serial
EEPROM.
3.1
EEPROM Format
Note the EEPROM offsets are given in units of 16-bit word offsets. A length field with a value of zero
indicates that the field does not exist in the EEPROM. The device will use the field’s HW default value
in this case.
Note: For Device Descriptors, the only valid values for the length are 0 and 18.
Note: For Configuration and Interface Descriptors, the only valid values for the length are 0 and 18.
Note: The EEPROM programmer must ensure that if a String Descriptor does not exist in the
EEPROM, the referencing descriptor must contain 00h for the respective string index field.
Note: If no Configuration Descriptor is present in the EEPROM, then the Configuration Flags affect
the values of bmAttributes and bMaxPower in the Ethernet Controller Configuration Descriptor.
Note: If all String Descriptor lengths are zero, then a Language ID will not be supported.
Table 3.1 EEPROM Format
EEPROM ADDRESS
EEPROM CONTENTS
00h
01h
02h
03h
04h
05h
06h
07h
08h
0xA5
MAC Address [7:0]
MAC Address [15:8]
MAC Address [23:16]
MAC Address [31:24]
MAC Address [39:32]
MAC Address [47:40]
Full-Speed Polling Interval for Interrupt Endpoint
Hi-Speed Polling Interval for Interrupt Endpoint
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Table 3.1 EEPROM Format (continued)
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
Configuration Flags
Language ID Descriptor [7:0]
Language ID Descriptor [15:8]
Manufacturer ID String Descriptor Length (bytes)
Manufacturer ID String Descriptor EEPROM Word Offset
Product Name String Descriptor Length (bytes)
Product Name String Descriptor EEPROM Word Offset
Serial Number String Descriptor Length (bytes)
Serial Number String Descriptor EEPROM Word Offset
Configuration String Descriptor Length (bytes)
Configuration String Descriptor Word Offset
Interface String Descriptor Length (bytes)
Interface String Descriptor Word Offset
Hi-Speed Device Descriptor Length (bytes)
Hi-Speed Device Descriptor Word Offset
Hi-Speed Configuration and Interface Descriptor Length (bytes)
Hi-Speed Configuration and Interface Descriptor Word Offset
Full-Speed Device Descriptor Length (bytes)
Full-Speed Device Descriptor Word Offset
Full-Speed Configuration and Interface Descriptor Length (bytes)
Full-Speed Configuration and Interface Descriptor Word Offset
RESERVED
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh-1Fh
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
Vendor ID LSB Register (VIDL)
Vendor ID MSB Register (VIDM)
Product ID LSB Register (PIDL)
Product ID MSB Register (PIDM)
Device ID LSB Register (DIDL)
Device ID MSB Register (DIDM)
Config Data Byte 1 Register (CFG1)
Config Data Byte 2 Register (CFG2)
Config Data Byte 3 Register (CFG3)
Non-Removable Devices Register (NRD)
Port Disable (Self) Register (PDS)
Port Disable (Bus) Register (PDB)
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Table 3.1 EEPROM Format (continued)
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
Max Power (Self) Register (MAXPS)
Max Power (Bus) Register (MAXPB)
Hub Controller Max Current (Self) Register (HCMCS)
Hub Controller Max Current (Bus) Register (HCMCB)
Power-on Time Register (PWRT)
Boost_Up Register (BOOSTUP)
RESERVED
Boost_3:2 Register (BOOST32)
RESERVED
Port Swap Register (PRTSP)
Port Remap 12 Register (PRTR12)
Port Remap 3 Register (PRTR3)
RESERVED
Status/Command Register (STCD)
Note: EEPROM byte addresses past 39h can be used to store data for any purpose.
Table 3.2 Configuration Flags Description
BIT
NAME
RESERVED
DESCRIPTION
7:3
2
00000b
Remote Wakeup Support
0 = The device does not support remote wakeup.
1 = The device supports remote wakeup.
1
0
RESERVED
0b
Power Method
0 = The device Controller is bus powered.
1 = The device Controller is self powered.
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3.1.1
Hub Configuration
these parameters and their default ROM values (Values assumed if no valid EEPROM present).
Table 3.3 Hub Configuration
EEPROM
OFFSET
DESCRIPTION
DEFAULT
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
Vendor ID LSB Register (VIDL)
24h
Least Significant Byte of the Vendor ID. This is a 16-bit value that uniquely identifies
the Vendor of the user device (assigned by USB-Interface Forum).
Vendor ID MSB (VIDM)
Most Significant Byte of the Vendor ID. This is a 16-bit value that uniquely identifies
the Vendor of the user device (assigned by USB-Interface Forum).
04h
12h
Product ID LSB Register (PIDL)
Least Significant Byte of the Product ID. This is a 16-bit value that the Vendor can
assign that uniquely identifies this particular product (assigned by the OEM).
Product ID MSB Register (PIDM)
Most Significant Byte of the Product ID. This is a 16-bit value that the Vendor can
assign that uniquely identifies this particular product (assigned by the OEM).
95h
Device ID LSB Register (DIDL)
Least Significant Byte of the Device ID. This is a 16-bit device release number in BCD
format (assigned by the OEM).
00h
Device ID MSB Register (DIDM)
Most Significant Byte of the Device ID. This is a 16-bit device release number in BCD
format (assigned by the OEM).
9Bh
Config Data Byte 1 Register (CFG1)
details.
Config Data Byte 2 Register (CFG2)
details.
18h
Config Data Byte 3 Register (CFG3)
details.
00h
Non-Removable Devices Register (NRD)
Indicates which port(s) include non-removable devices.
02h
0 = Port is removable
1 = Port is non-removable
Informs the host if one of the active ports has a permanent device that is not
detachable from the Hub.
Note:
The device must provide its own descriptor data.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = RESERVED
Bit 4 = RESERVED
Bit 3 = 1; Port 3 non-removable
Bit 2 = 1; Port 2 non-removable
Bit 1 = 1; Port 1 non-removable
Bit 0 is RESERVED, always = 0b
Note:
Bit 1 must be set to 1 by firmware for proper identification of the Ethernet
Controller as a non-removable device.
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Table 3.3 Hub Configuration (continued)
EEPROM
OFFSET
DESCRIPTION
DEFAULT
2Ah
Port Disable (Self) Register (PDS)
Disables 1 or more ports.
30h
0 = Port is available
1 = Port is disabled
During Self-Powered operation, this selects the ports which will be permanently
disabled, and are not available to be enabled or enumerated by a host controller. The
ports can be disabled in any order, the internal logic will automatically report the
correct number of enabled ports to the USB host, and will reorder the active ports in
order to ensure proper function.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = RESERVED
Bit 4 = RESERVED
Bit 3 = 1; Port 3 disabled
Bit 2 = 1; Port 2 disabled
Bit 1 = 1; Port 1 disabled
Bit 0 is RESERVED, always = 0b
2Bh
Port Disable (Bus) Register (PDB)
Disables 1 or more ports.
30h
0 = Port is available
1 = Port is disabled
During Bus-Powered operation, this selects the ports which will be permanently
disabled, and are not available to be enabled or enumerated by a host controller. The
ports can be disabled in any order, the internal logic will automatically report the
correct number of enabled ports to the USB host, and will reorder the active ports in
order to ensure proper function.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = RESERVED
Bit 4 = RESERVED
Bit 3 = 1; Port 3 disabled
Bit 2 = 1; Port 2 disabled
Bit 1 = 1; Port 1 disabled
Bit 0 is RESERVED, always = 0b
2Ch
2Dh
Max Power (Self) Register (MAXPS)
01h
00h
Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when
operating as a self-powered hub. This value includes the hub silicon along with the
combined power consumption (from VBUS) of all associated circuitry on the board.
This value also includes the power consumption of a permanently attached peripheral
if the hub is configured as a compound device, and the embedded peripheral reports
0mA in its descriptors.
Note:
The USB2.0 Specification does not permit this value to exceed 100mA.
Max Power (Bus) Register (MAXPB)
Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when
operating as a bus-powered hub. This value includes the hub silicon along with the
combined power consumption (from VBUS) of all associated circuitry on the board.
This value also includes the power consumption of a permanently attached peripheral
if the hub is configured as a compound device, and the embedded peripheral reports
0mA in its descriptors.
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Table 3.3 Hub Configuration (continued)
EEPROM
OFFSET
DESCRIPTION
DEFAULT
2Eh
2Fh
Hub Controller Max Current (Self) Register (HCMCS)
01h
Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when
operating as a self-powered hub. This value includes the hub silicon along with the
combined power consumption (from VBUS) of all associated circuitry on the board.
This value does NOT include the power consumption of a permanently attached
peripheral if the hub is configured as a compound device.
Note:
The USB2.0 Specification does not permit this value to exceed 100mA.
Hub Controller Max Current (Bus) Register (HCMCB)
00h
Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when
operating as a bus-powered hub. This value includes the hub silicon along with the
combined power consumption (from VBUS) of all associated circuitry on the board.
This value does NOT include the power consumption of a permanently attached
peripheral if the hub is configured as a compound device.
30h
31h
Power-on Time Register (PWRT)
32h
00h
The length of time that it takes (in 2mS intervals) from the time the host initiated
power-on sequence begins on a port until power is good on that port. System software
uses this value to determine how long to wait before accessing a powered-on port.
Boost_Up Register (BOOSTUP)
32h
33h
RESERVED
00h
00h
Boost_3:2 Register (BOOST32)
34h
35h
RESERVED
00h
00h
Port Swap Register (PRTSP)
Swaps the Upstream and Downstream USB DP and DM pins for ease of board routing
to devices and connectors.
0 = USB D+ functionality is associated with the DP pin and D- functionality is
associated with the DM pin.
1 = USB D+ functionality is associated with the DM pin and D- functionality is
associated with the DP pin.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = RESERVED
Bit 4 = RESERVED
Bit 3 = 1; Port 3 DP/DM is swapped
Bit 2 = 1; Port 2 DP/DM is swapped
Bit 1 = RESERVED
Bit 0 = 1; Upstream Port DP/DM is swapped
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Table 3.3 Hub Configuration (continued)
EEPROM
OFFSET
DESCRIPTION
Port Remap 12 Register (PRTR12)
DEFAULT
36h
21h
When a hub is enumerated by a USB Host Controller, the hub is only permitted to
report how many ports it has. The hub is not permitted to select a numerical range or
assignment. The Host Controller will number the downstream ports of the hub starting
with the number 1, up to the number of ports that the hub reported having.
The host’s port number is referred to as “Logical Port Number” and the physical port
on the hub is the “Physical Port Number”. When remapping mode is enabled, (see
Format) the hub’s downstream port numbers can be remapped to different logical port
numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are used,
starting from #1 up to the maximum number of enabled ports. This ensures
that the hub’s ports are numbered in accordance with the way a Host will
communicate with the ports.
Bit [7:4] =
0000
0001
0010
0011
Physical Port 2 is Disabled
Physical Port 2 is mapped to Logical Port 1
Physical Port 2 is mapped to Logical Port 2
Physical Port 2 is mapped to Logical Port 3
All others RESERVED
Bit [3:0] =
0000
0001
0010
0011
Physical Port 1 is Disabled
Physical Port 1 is mapped to Logical Port 1
Physical Port 1 is mapped to Logical Port 2
Physical Port 1 is mapped to Logical Port 3
All others RESERVED
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Table 3.3 Hub Configuration (continued)
EEPROM
OFFSET
DESCRIPTION
DEFAULT
37h
Port Remap 3 Register (PRTR3)
03h
When a hub is enumerated by a USB Host Controller, the hub is only permitted to
report how many ports it has. The hub is not permitted to select a numerical range or
assignment. The Host Controller will number the downstream ports of the hub starting
with the number 1, up to the number of ports that the hub reported having.
The host’s port number is referred to as “Logical Port Number” and the physical port
on the hub is the “Physical Port Number”. When remapping mode is enabled (see
Format), the hub’s downstream port numbers can be remapped to different logical port
numbers (assigned by the host).
Note:
The OEM must ensure that Contiguous Logical Port Numbers are used,
starting from #1 up to the maximum number of enabled ports, this ensures
that the hub’s ports are numbered in accordance with the way a Host will
communicate with the ports.
Bit [7:4] =
-
RESERVED
Bit [3:0] =
0000
0001
0010
0011
Physical Port 3 is Disabled
Physical Port 3 is mapped to Logical Port 1
Physical Port 3 is mapped to Logical Port 2
Physical Port 3 is mapped to Logical Port 3
All others RESERVED
38h
39h
RESERVED
00h
01h
Status/Command Register (STCD)
details.
Note 3.1 Default value is dependent on device revision.
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Table 3.4 Config Data Byte 1 Register (CFG1) Format
DESCRIPTION
BITS
DEFAULT
7
Self or Bus Power (SELF_BUS_PWR)
Selects between Self or Bus-Powered operation.
1b
0 = Bus-Powered
1 = Self-Powered
The Hub is either Self-Powered (draws less than 2mA of upstream bus
prior to being configured by the host controller).
When configured as a Bus-Powered device, the SMSC Hub consumes less
than 100mA of current prior to being configured. After configuration, the Bus-
Powered SMSC Hub (along with all associated hub circuitry, any embedded
devices if part of a compound device, and 100mA per externally available
downstream port) must consume no more than 500mA of upstream VBUS
current. The current consumption is system dependent, and the OEM must
ensure that the USB2.0 specifications are not violated.
When configured as a Self-Powered device, <1mA of upstream VBUS
current is consumed and all ports are available, with each port being capable
of sourcing 500mA of current.
6
5
RESERVED
0b
0b
High Speed Disable (HS_DISABLE)
Disables the capability to attach as either a High/Full-Speed device, and
forces attachment as Full-Speed only (no High-Speed support).
0 = High-/Full-Speed
1 = Full-Speed-Only (High-Speed disabled)
4
Multiple TT Enable (MTT_ENABLE)
Enables one transaction translator per port operation.
1b
Selects between a mode where only one transaction translator is available
for all ports (Single-TT), or each port gets a dedicated transaction translator
(Multi-TT) {Note: The host may force Single-TT mode only}.
0 = Single TT for all ports.
1 = One TT per port (multiple TT's supported)
3
EOP Disable (EOP_DISABLE)
1b
Disables EOP generation of EOF1 when in Full-Speed mode. During FS
operation only, this permits the Hub to send EOP if no downstream traffic is
detected at EOF1. See Section 11.3.1 of the USB 2.0 Specification for
additional details.
Note:
Generation of an EOP at the EOF1 point may prevent a Host
controller (operating in FS mode) from placing the USB bus in
suspend.
0 = An EOP is generated at the EOF1 point if no traffic is detected.
1 = EOP generation at EOF1 is disabled (note: this is normal USB
operation).
Note:
This is a rarely used feature in the PC environment, existing drivers
may not have been thoroughly debugged with this feature enabled.
It is included because it is a permitted feature in Chapter 11 of the
USB specification.
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Table 3.4 Config Data Byte 1 Register (CFG1) Format (continued)
DESCRIPTION
Over Current Sense (CURRENT_SNS)
BITS
DEFAULT
2:1
01b
Selects current sensing on a port-by-port basis, all ports ganged, or none
(only for bus-powered hubs) The ability to support current sensing on a port
or ganged basis is hardware implementation dependent.
00 = Ganged sensing (all ports together)
01 = Individual port-by-port
1x = Over current sensing not supported (must only be used with Bus-
Powered configurations!)
0
Port Power Switching (PORT_PWR)
1b
Enables power switching on all ports simultaneously (ganged), or port power
is individually switched on and off on a port by port basis (individual). The
ability to support power enabling on a port or ganged basis is hardware
implementation dependent.
0 = Ganged switching (all ports together)
1 = Individual port by port switching
Table 3.5 Config Data Byte 2 Register (CFG2) Format
BITS
7:6
DESCRIPTION
DEFAULT
00b
RESERVED
5:4
Over Current Timer (OC_TIMER)
Over Current Timer delay
01b
00 = 50ns
01 = 100ns (This is the recommended value)
10 = 200ns
11 = 400ns
3
Compound Device (COMPOUND)
1b
Allows the OEM to indicate that the Hub is part of a compound (see the USB
Specification for definition) device. The applicable port(s) must also be
defined as having a “Non-Removable Device”.
0 = No
1 = Yes, Hub is part of a compound device
2:0
RESERVED
000b
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Table 3.6 Config Data Byte 3 Register (CFG3) Format
DESCRIPTION
BITS
7:4
3
DEFAULT
RESERVED
0h
0b
Port Re-Mapping Enable (PRTMAP_EN)
Selects the method used by the Hub to assign port numbers and disable
ports.
0 = Standard Mode. The following EEPROM addresses are used to define
which ports are enabled. The ports mapped as Port’n’ on the Hub are
reported as Port’n’ to the host, unless one of the ports is disabled, then the
higher numbered ports are remapped in order to report contiguous port
numbers to the host.
EEPROM Address 2Ah: Port Disable for Self-Powered operation
EEPROM Address 2Bh: Port Disable for Bus-Powered operation
1 = Port Re-Map mode. The mode enables remapping via the following
EEPROM addresses:
EEPROM Address 36h: Port Remap 12
EEPROM Address 37h: Port Remap 3
2:0
RESERVED
000b
Table 3.7 Boost_Up Register (BOOSTUP) Format
BITS
7:2
DESCRIPTION
DEFAULT
000000b
00b
RESERVED
1:0
Upstream USB Electrical Signaling Drive Strength Boost Bit for
Upstream Port A (BOOST_IOUT_A)
00 = Normal electrical drive strength
01 = Elevated electrical drive strength (+4% boost)
10 = Elevated electrical drive strength (+8% boost)
11 = Elevated electrical drive strength (+12% boost)
Table 3.8 Boost_3:2 Register (BOOST32) Format
BITS
7:6
DESCRIPTION
DEFAULT
00b
RESERVED
5:4
Upstream USB Electrical Signaling Drive Strength Boost Bit for
Downstream Port 3 (BOOST_IOUT_3)
00b
00 = Normal electrical drive strength
01 = Elevated electrical drive strength (+4% boost)
10 = Elevated electrical drive strength (+8% boost)
11 = Elevated electrical drive strength (+12% boost)
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Table 3.8 Boost_3:2 Register (BOOST32) Format (continued)
BITS
DESCRIPTION
DEFAULT
3:2
Upstream USB Electrical Signaling Drive Strength Boost Bit for
Downstream Port 2 (BOOST_IOUT_2)
00b
00 = Normal electrical drive strength
01 = Elevated electrical drive strength (+4% boost)
10 = Elevated electrical drive strength (+8% boost)
11 = Elevated electrical drive strength (+12% boost)
1:0
RESERVED
00b
Table 3.9 Status/Command Register (STCD) Format
BITS
7:2
1
DESCRIPTION
DEFAULT
000000b
0b
RESERVED
Reset (RESET)
Resets the internal memory back to nRESET assertion default settings.
0 = Normal Run/Idle State
1 = Force a reset of the registers to their default state
Note:
During this reset, this bit is automatically cleared to its default value
of 0.
0
USB Attach and Write Protect (USB_ATTACH)
1b
0 = Device is in configuration state
1 = Hub will signal a USB attach event to an upstream device, and the
internal memory (address range 00h - FEh) is “write-protected” to prevent
unintentional data corruption.
Note:
This bit is write once and is only cleared by assertion of the external
nRESET or POR.
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3.2
EEPROM Defaults
The signature value of 0xA5 is stored at address 0. A different signature value indicates to the
EEPROM controller that no EEPROM or an un-programmed EEPROM is attached to the device. In
Table 3.10 EEPROM Defaults
FIELD
DEFAULT VALUE
Ethernet Controller
MAC Address
FFFFFFFFFFFFh
Ethernet Controller
Full-Speed Polling
Interval (mS)
01h
04h
Ethernet Controller
Hi-Speed Polling Interval
(mS)
Ethernet Controller
Configuration Flags
05h
01h
Ethernet Controller
Maximum Power (mA)
Ethernet Controller
Vendor ID
0424h
EC00h
Ethernet Controller
Product ID
3.3
EEPROM Auto-Load
Certain system level resets (USB reset, POR, nRESET, and SRST) cause the EEPROM contents to
be loaded into the device. After a reset, the EEPROM controller attempts to read the first byte of data
from the EEPROM. If the value 0xA5 is read from the first address, then the EEPROM controller will
assume that the external Serial EEPROM is configured for auto-loading. If a value other than 0xA5 is
read from the first address, the EEPROM auto-load will not commense.
Note: The EEPROM contents are loaded for both the Hub and the Ethernet Controller as a result of
a POR or nRESET. The USB reset results only in the loading of the MAC address from the
EEPROM. A software reset (SRST) or a EEPROM Reload Command causes the EEPROM
contents related solely to the Ethernet Controller to be loaded.
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3.4
An Example of EEPROM Format Interpretation
by byte, how the EEPROM is formatted.
Table 3.11 Dump of EEPROM Memory
OFFSET
BYTE
VALUE
0000h
0008h
A5 12 34 56 78 9A BC 01
04 05 09 04 0A 1D 00 00
00 00 00 00 00 00 12 22
12 2B 12 34 12 3D 00 00
24 04 12 95 00 01 9B 18
00 02 30 30 01 00 01 00
32 00 00 00 00 00 21 03
00 01 0A 03 53 00 4D 00
53 00 43 00 12 01 00 02
FF 00 01 40 24 04 00 EC
00 01 01 00 00 01 09 02
27 00 01 01 00 E0 01 09
04 00 00 03 FF 00 FF 00
12 01 00 02 FF 00 FF 40
24 04 00 EC 00 01 01 00
00 01 09 02 27 00 01 01
00 E0 01 09 04 00 00 03
FF 00 FF 00 ....................
..........................................
0010h
0018h
0020h
0028h
0030h
0038h
0040h
0048h
0050h
0058h
0060h
0068h
0070h
0078h
0080h
0088h
0090h - 00FFh
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Table 3.12 EEPROM Example - 256 Byte EEPROM
EEPROM
EEPROM
ADDRESS
CONTENTS
(HEX)
DESCRIPTION
00h
01h-06h
07h
A5
EEPROM Programmed Indicator
12 34 56 78 9A BC
MAC Address 12 34 56 78 9A BC
01
04
05
Full-Speed Polling Interval for Interrupt Endpoint (1ms)
Hi-Speed Polling Interval for Interrupt Endpoint (4ms)
08h
09h
Configuration Flags - The device is self powered and supports remote
wakeup.
0Ah-0Bh
0Ch
09 04
0A
Language ID Descriptor 0409h, English
Manufacturer ID String Descriptor Length (10 bytes)
0Dh
1D
Manufacturer ID String Descriptor EEPROM Word Offset (1Dh)
Corresponds to EEPROM Byte Offset 3Ah
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
00
00
00
00
00
00
00
00
12
22h
Product Name String Descriptor Length (0 bytes - NA)
Product Name String Descriptor EEPROM Word Offset (Don’t Care)
Serial Number String Descriptor Length (0 bytes - NA)
Serial Number String Descriptor EEPROM Word Offset (Don’t Care)
Configuration String Descriptor Length (0 bytes - NA)
Configuration String Descriptor Word Offset (Don’t Care)
Interface String Descriptor Length (0 bytes - NA)
Interface String Descriptor Word Offset (Don’t Care)
Hi-Speed Device Descriptor Length (18 bytes)
Hi-Speed Device Descriptor Word Offset (22h)
Corresponds to EEPROM Byte Offset 44h
18h
19h
12
2B
Hi-Speed Configuration and Interface Descriptor Length (18 bytes)
Hi-Speed Configuration and Interface Descriptor Word Offset (2Bh)
Corresponds to EEPROM Byte Offset 56h
1Ah
1Bh
12
34
Full-Speed Device Descriptor Length (18 bytes)
Full-Speed Device Descriptor Word Offset (34h)
Corresponds to EEPROM Byte Offset 68h
1Ch
1Dh
12
Full-Speed Configuration and Interface Descriptor Length (18bytes)
3D
Full-Speed Configuration and Interface Descriptor Word Offset (3Dh)
Corresponds to EEPROM Byte Offset 7Ah
1Eh
1Fh
20h
00
00
24
RESERVED
RESERVED
Vendor ID LSB Register (VIDL)
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Table 3.12 EEPROM Example - 256 Byte EEPROM (continued)
EEPROM
CONTENTS
(HEX)
EEPROM
ADDRESS
DESCRIPTION
Vendor ID MSB Register (VIDM)
21h
22h
04
12
95
00
01
9B
18
00
02
30
30
01
00
01
00
32
00
00
00
00
00
21
03
00
01
0A
03
Product ID LSB Register (PIDL)
Product ID MSB Register (PIDM)
Device ID LSB Register (DIDL)
Device ID MSB Register (DIDM)
Config Data Byte 1 Register (CFG1)
Config Data Byte 2 Register (CFG2)
Config Data Byte 3 Register (CFG3)
Non-Removable Devices Register (NRD)
Port Disable (Self) Register (PDS)
Port Disable (Bus) Register (PDB)
Max Power (Self) Register (MAXPS)
Max Power (Bus) Register (MAXPB)
Hub Controller Max Current (Self) Register (HCMCS)
Hub Controller Max Current (Bus) Register (HCMCB)
Power-on Time Register (PWRT)
Boost_Up Register (BOOSTUP)
RESERVED
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
Boost_3:2 Register (BOOST32)
RESERVED
34h
35h
Port Swap Register (PRTSP)
36h
Port Remap 12 Register (PRTR12)
Port Remap 3 Register (PRTR3)
RESERVED
37h
38h
39h
Status/Command Register (STCD)
Size of Manufacturer ID String Descriptor (10 bytes)
Descriptor Type (String Descriptor - 03h)
3A
3Bh
3Ch-43h
44h
53 00 4D 00 53 00 43 00 Manufacturer ID String (“SMSC” in UNICODE)
12
01
Size of Hi-Speed Device Descriptor in Bytes (18 bytes)
Descriptor Type (Device Descriptor - 01h)
45h
46h-47h
00 02
USB Specification Number that the device complies with (0200h)
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Table 3.12 EEPROM Example - 256 Byte EEPROM (continued)
EEPROM
CONTENTS
(HEX)
EEPROM
ADDRESS
DESCRIPTION
48h
49h
FF
00
Class Code
Subclass Code
Protocol Code
4Ah
FF
4Bh
40
Maximum Packet Size for Endpoint 0
Vendor ID (0424h)
4Ch-4Dh
4Eh-4Fh
50h-51h
52h
24 04
00 EC
00 01
01
Product ID (EC00h)
Device Release Number (0100h)
Index of Manufacturer String Descriptor
Index of Product String Descriptor
53h
00
54h
00
Index of Serial Number String Descriptor
Number of Possible Configurations
55h
01
56h
09
Size of Hi-Speed Configuration Descriptor in bytes (9 bytes)
Descriptor Type (Configuration Descriptor - 02h)
Total length in bytes of data returned (0027h = 39 bytes)
Number of Interfaces
57h
02
58h-59h
5Ah
27 00
01
5Bh
01
Value to use as an argument to select this configuration
Index of String Descriptor describing this configuration
Self powered and remote wakeup enabled
Maximum Power Consumption is 2 mA
Size of Descriptor in Bytes (9 Bytes)
Descriptor Type (Interface Descriptor - 04h)
Number identifying this Interface
5Ch
00
5Dh
E0
5Eh
01
5Fh
09
60h
04
61h
00
62h
00
Value used to select alternative setting
Number of Endpoints used for this interface (Less endpoint 0)
Class Code
63h
03
64h
FF
65h
00
Subclass Code
66h
FF
Protocol Code
67h
00
Index of String Descriptor Describing this interface
Size of Full-Speed Device Descriptor in Bytes (18 Bytes)
Descriptor Type (Device Descriptor - 01h)
USB Specification Number that the device complies with (0200h)
68h
12
69h
01
6Ah-6Bh
00 02
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Table 3.12 EEPROM Example - 256 Byte EEPROM (continued)
EEPROM
CONTENTS
(HEX)
EEPROM
ADDRESS
DESCRIPTION
6Ch
6Dh
FF
00
Class Code
Subclass Code
Protocol Code
6Eh
FF
6Fh
40
Maximum Packet Size for Endpoint 0
Vendor ID (0424h)
70h-71h
72h-73h
74h-75h
76
24 04
00 EC
00 01
01
Product ID (EC00h)
Device Release Number (0100h)
Index of Manufacturer String Descriptor
Index of Product String Descriptor
77h
00
78h
00
Index of Serial Number String Descriptor
Number of Possible Configurations
79h
01
7Ah
09
Size of Full-Speed Configuration Descriptor in bytes (9 bytes)
Descriptor Type (Configuration Descriptor - 02h)
Total length in bytes of data returned (0027h = 39 bytes)
Number of Interfaces
7Bh
02
7Ch-7Dh
7Eh
27 00
01
7Fh
01
Value to use as an argument to select this configuration
Index of String Descriptor describing this configuration
Self powered and remote wakeup enabled
Maximum Power Consumption is 2 mA
Size of Full-Speed Interface Descriptor in Bytes (9 Bytes)
Descriptor Type (Interface Descriptor - 04h)
Number identifying this Interface
80h
00
81h
E0
01
82h
83h
09
84h
04
85h
00
86h
00
Value used to select alternative setting
Number of Endpoints used for this interface (Less endpoint 0)
Class Code
87h
03
88h
FF
89h
00
Subclass Code
8Ah
FF
Protocol Code
8Bh
00
Index of String Descriptor describing this interface
Data storage for use by Host as desired
8Ch-FFh
-
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Chapter 4 Operational Characteristics
4.1
Absolute Maximum Ratings*
Supply Voltage (VDD33IO, VDD33A) (Note 4.1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0V to +3.6V
Positive voltage on signal pins, with respect to ground (Note 4.2). . . . . . . . . . . . . . . . . . . . . . . . . . +6V
Negative voltage on signal pins, with respect to ground (Note 4.3) . . . . . . . . . . . . . . . . . . . . . . . . -0.5V
Positive voltage on XI, with respect to ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+4.6V
Positive voltage on XO, with respect to ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+2.5V
o
o
Ambient Operating Temperature in Still Air (T ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 C to +70 C
A
o
o
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55 C to +150 C
Lead Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to JEDEC Spec. J-STD-020
HBM ESD Performance per JESD 22-A114-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+/- 8kV
Contact Discharge ESD Performance per IEC61000-4-2 (Note 4.4) . . . . . . . . . . . . . . . . . . . . . .+/- 8kV
Air-Gap Discharge ESD Performance per IEC61000-4-2 (Note 4.4) . . . . . . . . . . . . . . . . . . . . .+/- 15kV
Latch-up Performance per EIA/JESD 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+/- 200mA
Note 4.1 When powering this device from laboratory or system power supplies, it is important that
the absolute maximum ratings not be exceeded or device failure can result. Some power
supplies exhibit voltage spikes on their outputs when AC power is switched on or off. In
addition, voltage transients on the AC power line may appear on the DC output. If this
possibility exists, it is suggested that a clamp circuit be used.
Note 4.2 This rating does not apply to the following pins: XI, XO, EXRES, USBRBIAS.
Note 4.3 This rating does not apply to the following pins: EXRES, USBRBIAS.
Note 4.4 Performed by independant 3rd party test facility.
*Stresses exceeding those listed in this section could cause permanent damage to the device. This is
a stress rating only. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability. Functional operation of the device at any condition exceeding those indicated in
Section 4.2, "Operating Conditions**", Section 4.4, "DC Specifications", or any other applicable section
of this specification is not implied. Note, device signals are NOT 5 volt tolerant unless specified
otherwise.
4.2
Operating Conditions**
Supply Voltage (VDD33A, VDD33BIAS, VDD33IO) . . . . . . . . . . . . . . . . . . . . . . . . . . .+3.3V +/- 300mV
o
o
Ambient Operating Temperature in Still Air (T ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 C to +70 C
A
**Proper operation of LAN9512 is guaranteed only within the ranges specified in this section.
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4.3
Power Consumption
This section details the power consumption of the device as measured during various modes of
operation. Power dissipation is determined by temperature, supply voltage, and external source/sink
requirements.
4.3.1
Operational Current Consumption & Power Dissipation
Table 4.1 Operational Current Consumption & Power Dissipation (VDD33IO = VDD33A = 3.3V)
PARAMETER
MIN
TYPICAL
MAX
UNIT
100BASE-TX Full Duplex (USB High-Speed)
Supply current (VDD33IO, VDD33A)
Power Dissipation (Device Only)
231
763
mA
mW
10BASE-T Full Duplex (USB High-Speed)
Supply current (VDD33IO, VDD33A)
Power Dissipation (Device Only)
188
621
mA
mW
10BASE-T Full Duplex (USB Full-Speed)
Supply current (VDD33IO, VDD33A)
Power Dissipation (Device Only)
152
502
mA
mW
Note: All values measured with maximum simultaneous traffic on the Ethernet port and all USB ports.
Note: Magnetic power consumption:
„ 100BASE-TX: ~42mA
„ 10BASE-T: ~104mA
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4.4
DC Specifications
Table 4.2 I/O Buffer Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
IS Type Input Buffer
Low Input Level
V
-0.3
V
V
ILI
IHI
ILT
IHT
High Input Level
V
V
3.6
1.35
1.8
Negative-Going Threshold
Positive-Going Threshold
SchmittTrigger Hysteresis
1.01
1.39
345
1.18
1.6
V
Schmitt trigger
Schmitt trigger
V
V
V
420
485
mV
HYS
(V
- V
)
IHT
ILT
Input Leakage
IN
I
-10
10
uA
pF
IH
(V = VSS or VDD33IO)
Input Capacitance
C
2.5
IN
IS_5V Type Input Buffer
Low Input Level
V
-0.3
V
V
ILI
IHI
ILT
IHT
High Input Level
V
V
5.5
1.35
1.8
Negative-Going Threshold
Positive-Going Threshold
SchmittTrigger Hysteresis
1.01
1.39
345
1.18
1.6
V
Schmitt trigger
Schmitt trigger
V
V
V
420
485
mV
HYS
(V
- V
)
IHT
ILT
Input Leakage
IN
I
I
-10
10
120
3.5
uA
uA
pF
IH
IH
(V = VSS or VDD33IO)
Input Leakage
(V = 5.5V)
IN
Input Capacitance
O8 Type Buffers
C
IN
Low Output Level
V
0.4
V
V
I
= 8mA
OL
OL
VDD33IO - 0.4
High Output Level
OD8 Type Buffer
V
I
= -8mA
OH
OH
Low Output Level
O12 Type Buffers
V
V
0.4
0.4
V
I
= 8mA
OL
OL
Low Output Level
V
V
I
= 12mA
= -12mA
OL
OL
VDD33IO - 0.4
High Output Level
OD12 Type Buffer
V
I
OH
OH
Low Output Level
V
0.4
V
I
= 12mA
OL
OL
ICLK Type Buffer (XI Input)
Low Input Level
High Input Level
V
-0.3
1.4
0.5
3.6
V
V
ILI
V
IHI
Note 4.5 This specification applies to all inputs and tri-stated bi-directional pins. Internal pull-down
and pull-up resistors add +/- 50uA per-pin (typical)
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Note 4.6 This is the total 5.5V input leakage for the entire device.
Note 4.7 XI can optionally be driven from a 25MHz single-ended clock oscillator.
Table 4.3 100BASE-TX Transceiver Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Peak Differential Output Voltage High
Peak Differential Output Voltage Low
Signal Amplitude Symmetry
Signal Rise and Fall Time
Rise and Fall Symmetry
Duty Cycle Distortion
V
950
-950
98
3.0
-
-
-
1050
-1050
102
5.0
mVpk
mVpk
%
PPH
V
PPL
V
-
SS
T
-
nS
RF
T
-
0.5
nS
RFS
D
35
-
50
-
65
%
CD
Overshoot and Undershoot
Jitter
V
5
%
OS
1.4
nS
Note 4.8 Measured at line side of transformer, line replaced by 100Ω (+/- 1%) resistor.
Note 4.9 Offset from 16nS pulse width at 50% of pulse peak.
Note 4.10 Measured differentially.
Table 4.4 10BASE-T Transceiver Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Transmitter Peak Differential Output Voltage
Receiver Differential Squelch Threshold
V
2.2
2.5
2.8
V
OUT
V
300
420
585
mV
DS
Note 4.11 Min/max voltages guaranteed as measured with 100Ω resistive load.
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4.5
AC Specifications
This section details the various AC timing specifications of the LAN9512.
Note: The USBDP and USBDM pin timing adheres to the USB 2.0 specification. Refer to the
Universal Serial Bus Revision 2.0 specification for detailed USB timing information.
4.5.1
Equivalent Test Load
OUTPUT
25 pF
Figure 4.1 Output Equivalent Test Load
4.5.2
Reset Timing
The nRESET pin input assertion time must be a minimum of 1 μS. Assertion of nRESET is not a
requirement. However, if used, it must be asserted for the minimum period specified.
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4.5.3
EEPROM Timing
The following specifies the EEPROM timing requirements for LAN9512:
tcsl
EECS
tckcyc
tcklcsl
tckh
tckl
tcshckh
EECLK
tckldis
tdvckh tckhdis
EEDO
EEDI
tdsckh
tdhckh
tdhcsl
tcshdv
EEDI (VERIFY)
Figure 4.1 EEPROM Timing
Table 4.5 EEPROM Timing Values
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
t
EECLK Cycle time
1110
550
550
1070
30
1130
570
570
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ckcyc
EECLK High time
tckh
EECLK Low time
tckl
EECS high before rising edge of EECLK
EECLK falling edge to EECS low
EEDO valid before rising edge of EECLK
EEDO disable after rising edge EECLK
EEDI setup to rising edge of EECLK
EEDI hold after rising edge of EECLK
EECLK low to data disable (OUTPUT)
EEDIO valid after EECS high (VERIFY)
EEDIO hold after EECS low (VERIFY)
EECS low
tcshckh
tcklcsl
tdvckh
tckhdis
tdsckh
tdhckh
tckldis
tcshdv
tdhcsl
tcsl
550
550
90
0
580
600
0
1070
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4.6
Clock Circuit
LAN9512 can accept either a 25MHz crystal (preferred) or a 25MHz single-ended clock oscillator (+/-
50ppm) input. If the single-ended clock oscillator method is implemented, XO should be left
unconnected and XI should be driven with a nominal 0-3.3V clock signal. The input clock duty cycle
is 40% minimum, 50% typical and 60% maximum.
It is recommended that a crystal utilizing matching parallel load capacitors be used for the crystal
Table 4.6 LAN9512 Crystal Specifications
PARAMETER
SYMBOL
MIN
NOM
AT, typ
Fundamental Mode
Parallel Resonant Mode
MAX
UNITS
NOTES
Crystal Cut
Crystal Oscillation Mode
Crystal Calibration Mode
Frequency
F
-
25.000
-
MHz
PPM
PPM
PPM
PPM
pF
fund
o
Frequency Tolerance @ 25 C
Frequency Stability Over Temp
Frequency Deviation Over Time
Total Allowable PPM Budget
Shunt Capacitance
F
-
-
+/-50
tol
F
-
-
+/-50
temp
F
-
+/-3 to 5
-
age
-
-
7 typ
20 typ
-
+/-50
C
-
-
O
Load Capacitance
C
-
-
-
pF
L
Drive Level
P
300
uW
W
Equivalent Series Resistance
Operating Temperature Range
LAN9512 XI Pin Capacitance
LAN9512 XO Pin Capacitance
R
-
0
-
-
50
+70
-
Ohm
1
o
-
C
3 typ
3 typ
pF
pF
-
-
Note 4.12 The maximum allowable values for Frequency Tolerance and Frequency Stability are
application dependant. Since any particular application must meet the IEEE +/-50 PPM
Total PPM Budget, the combination of these two values must be approximately +/-45 PPM
(allowing for aging).
Note 4.13 Frequency Deviation Over Time is also referred to as Aging.
Note 4.14 The total deviation for the Transmitter Clock Frequency is specified by IEEE 802.3u as
+/- 50 PPM.
Note 4.15 This number includes the pad, the bond wire and the lead frame. PCB capacitance is not
included in this value. The XO/XI pin and PCB capacitance values are required to
accurately calculate the value of the two external load capacitors. These two external load
capacitors determine the accuracy of the 25.000 MHz frequency.
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Chapter 5 Package Outline
5.1
64-QFN Package
Figure 5.1 LAN9512 64-QFN Package Definition
Table 5.1 LAN9512 64-QFN Dimensions
MIN
NOMINAL
MAX
REMARKS
A
0.80
0.00
-
0.85
0.02
1.00
0.05
0.80
9.10
8.85
7.40
0.50
0.30
Overall Package Height
Standoff
A1
A2
0.65
Mold Cap Thickness
X/Y Body Size
D/E
D1/E1
D2/E2
L
8.90
8.65
7.20
0.30
0.18
9.00
8.75
X/Y Mold Cap Size
X/Y Exposed Pad Size
Terminal Length
7.30
0.40
b
0.25
Terminal Width
e
0.50 BSC
-
Terminal Pitch
K
0.35
-
Pin to Center Pad Clearance
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Notes:
1. All dimensions are in millimeters unless otherwise noted.
2. Dimension “b” applies to plated terminals and is measured between 0.15 and 0.30 mm from the terminal tip.
3. Details of terminal #1 identifier are optional, but must be located within the area indicated. The terminal #1
identifier may be either a mold or marked feature.
Figure 5.2 LAN9512 Recommended PCB Land Pattern
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