82546EB datasheet(18/47 Pages) INTEL

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82546EB — Networking Silicon

Datasheet

3.3

EEPROM Interface Signals

3.4

Flash Interface Signals

3.5

Miscellaneous Signals

3.5.1

LED Signals

Symbol

Type

Name and Function

EE_DI

EEPROM Data Input. The EEPROM Data Input pin is used for output to the memory

device.

EE_DO

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.

EE_CS

EEPROM Chip Select. The EEPROM Chip Select signal is used to enable the device.

EE_SK

EEPROM Serial Clock. The EEPROM Shift Clock provides the clock rate for the

EEPROM interface, which is approximately 1 MHz.

Symbol

Type

Name and Function

FL_ADDR

[18:0]

Flash Address Output. The Flash Address Output signals are used for a Flash or Boot

ROM device.

FL_CS#

Flash Chip Select. The Flash Chip Select signal is used to enable the Flash or Boot

ROM device.

FL_OE#

Flash Output Enable. The Flash Output Enable signal is used to enable the Flash

buffers.

FL_WE#

Flash Write Enable Output. The Flash Write ENable Output signals are used for write

cycles.

FL_DATA

[7:2]

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

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.

Symbol

Type

Name and Function

ACT_A#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.

LINK_A#O

Link A. The Link LED signal indicates link connectivity on port 1 (port A).

LINKA100#

Link A 100. The Link 100 signal drives an LED indicating link at 100 Mbps on port 1

(port A).

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