82544EI Datasheet, PDF (11/52 Pages) Intel Corporation – Gigabit Ethernet Controller

82544EI Gigabit Ethernet Controller Networking Silicon Datasheet
3.0
Signal Descriptions
Special Note: The targeted signal names are subject to change without notice. Verify with your local Intel sales
office that you have the latest data sheet before finalizing a design.
3.1
Signal Type Definitions
The signals of the 82544EI controller are electrically defined in the following fashion:
Name
I
O
TS
STS
OD
A
P
Definition
A standard input-only digital signal.
A standard output-only digital signal.
A bi-directional, three-state digital input/output signal.
A sustained, digital, three-state signal that is driven by one owner at a time. An agent that drives
an STS pin low must actively drive it high for at least one clock before letting it float. The next
owner of the signal cannot start driving it any sooner than one clock after it is released by the
previous owner.
An open-drain digital signal. It is wired-OR’ed with other agents. The signaling agent asserts the
signal, but the signal is returned to the inactive state by a weak pull-up resistor. The pull-up
resistor may take two or three clock periods to fully restore the signal to the deasserted state.
PHY analog data signal.
A power connection, voltage reference, or other reference connection.
3.2
PCI/PCI-X Bus Interface
When RST# is asserted, the 82544EI Gigabit Ethernet Controller will not drive any PCI output or
bi-directional pins except PME#.
Datasheet
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