82546EB Datasheet, PDF (19/47 Pages) Intel Corporation – Dual Port Gigabit Ethernet Controller

Networking Silicon — 82546EB
3.5.2
3.6
3.6.1
Symbol Type
Name and Function
LINKA1000# O
ACT_B#
O
LINK_B#
O
LINKB100# O
Link A 1000. The Link 1000 signal drives an LED indicating link at 1000 Mbps on port
1 (port A).
Activity B. The Activity LED signal flashes an LED to indicate activity on port 2 (port
B) only for packets destined for this node.
Link B. The Link LED signal indicates link connectivity on port 2 (port B).
Link B 100. The Link 100 signal drives an LED indicating link at 100 Mbps on port 2
(port B).
LINKB1000# O
Link B 1000. The Link 1000 signal drives an LED indicating link at 1000 Mbps on port
2 (port B).
Software Definable Signals
Symbol
SDP[7:6]
SDP[1:0]
Type
Name and Function
Software Defined Pin. The Software Defined Pins are reserved and programmable
with respect to input and output capability. These default to input signals upon power-up
TS
but may be configured differently by the EEPROM. The upper four bits may be mapped
to the General Purpose Interrupt bits if they are configured as input signals.
Note: SDP5 is not included in the group of Software Defined Pins.
PHY Signals
Crystal Signals
Symbol
XTAL1
XTAL2
Type
Name and Function
Crystal One. The Crystal One pin is a 25 MHz +/- 50 ppm input signal. It can be
I
connected to either an oscillator or crystal. If a crystal is used, Crystal Two (XTAL2)
must also be connected.
Crystal Two. Crystal Two is the output of an internal oscillator circuit used to drive a
O
crystal into oscillation. If an external oscillator is used in the design, XTAL2 must be
disconnected.
Datasheet
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