82546EB Datasheet, PDF (18/47 Pages) Intel Corporation – Dual Port Gigabit Ethernet Controller

82546EB — Networking Silicon
3.3
EEPROM Interface Signals
3.4
Symbol
EE_DI
EE_DO
EE_CS
EE_SK
Type
Name and Function
O
EEPROM Data Input. The EEPROM Data Input pin is used for output to the memory
device.
I
EEPROM Data Output. The EEPROM Data Output pin is used for input from the
memory device. The EE_DO includes an internal pull-up resistor.
O
EEPROM Chip Select. The EEPROM Chip Select signal is used to enable the device.
O
EEPROM Serial Clock. The EEPROM Shift Clock provides the clock rate for the
EEPROM interface, which is approximately 1 MHz.
Flash Interface Signals
3.5
3.5.1
12
Symbol Type
Name and Function
FL_ADDR
[18:0]
O
Flash Address Output. The Flash Address Output signals are used for a Flash or Boot
ROM device.
FL_CS#
O
FL_OE# O
Flash Chip Select. The Flash Chip Select signal is used to enable the Flash or Boot
ROM device.
Flash Output Enable. The Flash Output Enable signal is used to enable the Flash
buffers.
FL_WE# O
FL_DATA
[7:2]
TS
Flash Write Enable Output. The Flash Write ENable Output signals are used for write
cycles.
Flash Data I/O. The Flash Data I/O signals are bi-directional and used for Flash data.
These signals include internal pull-up devices.
FL_DATA
[1:0]/
LAN_DISA
TS
BLE#
Flash Data I/O [1:0] / LAN Port Disable. These pins are inputs from the Flash
memory. Alternatively, they can be used to disable the LAN A or LAN B port from a
system Super I/O General (GP) port. (FL_DATA[1] corresponds to LAN B, and
FL_DATA[0], to LAN A.) They have internal pull-up devices. If the 82546EB is not using
Flash functionality, these pins should be connected to external pull-up resistors.
If the pins are used as LAN_DISABLE#, the device transitions to a low power state, and
the corresponding LAN port is disabled when its pin is sampled low on the rising edge
of PCI reset.
Miscellaneous Signals
LED Signals
Symbol
ACT_A#
LINK_A#
LINKA100#
Type
Name and Function
O
Activity A. The Activity LED signal flashes an LED to indicate receive activity on port
1 (port A) only for packets destined for this node.
O
Link A. The Link LED signal indicates link connectivity on port 1 (port A).
O
Link A 100. The Link 100 signal drives an LED indicating link at 100 Mbps on port 1
(port A).
Datasheet