82573 Datasheet, PDF (13/39 Pages) Intel Corporation – GbE Controllers

Datasheet—82573
2.5.2
Note:
2.5.3
2.5.4
System Management Bus (SMBus) Signals¹
The signals listed in the following table should not be connected when using an 82573L.
Refer to the 82573/82562 Dual Footprint Design Guide reference schematics for more
information.
Signal
SMB_CLK
SMB_DAT
SMB_ALRT#/
ASF_PWR_
GOOD
Type
Name and Function
SMBus Clock
I/O
The SMBus Clock signal is an open drain signal for the serial SMBus interface.
SMBus Data
I/O
The SMB Data signal is an open drain signal for the serial SMBus interface.
SMBus Alert/PCI Power Good
I/O
The SMBus Alert signal is an open drain signal for serial SMBus interface. In ASF
mode, this signal acts as the PCI Power Good input signal.
LED Signals
Signal
LED0#
LED1#
LED2#
Type
Name and Function
LED0
O
This pin provides a signal for programmable LED indication.
LED1
O
This pin provides a signal for programmable LED indication.
LED2
O
This pin provides a signal for programmable LED indication.
Other Signals
Signal
THERMn
THERMp
FUSEV
Type
Name and Function
Thermal Test Pins
O
These pins are used for thermal testing. They can be connected to test points.
Fuse Supply
P
This should be connected to 2.5V for normal operation.
1. The 82573L does not support the System Management Bus (SMBus).
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