GD82541PI datasheet(15/46 Pages) INTEL

15 / 46 page

Networking Silicon — 82541(PI/GI/EI)

3.3

EEPROM and Serial FLASH Interface Signals (9)

3.4

Miscellaneous Signals

3.4.1

LED Signals (4)

Symbol

Type

Name and Function

EEMODE

EEPROM Mode. The EEPROM Mode pin is used to select the interface and

source of the EEPROM used to initialize the device. For a MIcrowire* EEPROM on

the standard EEPROM pins, tie this pin to ground with a 1 K

Ω pull-down resistor

(for the 82541PI, use a 100

Ω pull-down resistor instead). For an Serial Peripheral

Interface (SPI*) EEPROM attached to the Flash memory pins, leave this pin

unconnected.

EEDI

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

memory device.

EEDO

EEPROM Data Output. The EEPROM Data Output pin is used for input from the

memory device. EEDO includes an internal pull-up resistor.

EECS

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

device.

EESK

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

EEPROM interface, which is approximately 1 MHz for Microwire* and 2 MHz for

SPI.

FLSH_CE#

FLASH Chip Enable Output. Used to enable FLASH device.

FLSH_SCK

FLASH Serial Clock Output. The clock rate of the serial FLASH interface is

approximately 1 MHz.

FLSH_SI

FLASH Serial Data Input. This pin is an output to the memory device.

FLSH_SO/

LAN_DISABLE#

FLASH Serial Data Output / LAN Disable. This pin is an input from the FLASH

memory. Alternatively, the pin can be used to disable the LAN port from a system

GP (General Purpose) port. If the 82541(PI/GI/EI) is not using Flash functionality,

the pin should be connected to external pull-up resistor.

If this pin is used as LAN_DISABLE#, the device goes to low power state and the

LAN port is disabled when the pin is sampled low on rising edge of PCI reset.

Symbol

Type

Name and Function

LED0 / LINK_UP#

LED0 / LINK Up. Programmable LED indication. Defaults to indicate link

connectivity.

LED1 / ACTIVITY#

LED1 / Activity. Programmable LED indication. Defaults to flash to indicate

transmit or receive activity.

LED2 / LINK100#

LED2 / LINK 100. Programmable LED indication. Defaults to indicate link at

100 Mbps.

LED3 / LINK1000#

LED3 / LINK 1000. Programmable LED indication. Defaults to indicate link at

1000 Mbps.

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