Networking Silicon — 82540EP

 

 

 

Symbol

Type

Name and Function

 

 

 

FL_CE#

O

FLASH Chip Enable Output. Used to enable FLASH device.

 

 

 

FL_SCK

O

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

approximately 1 MHz.

 

 

 

 

 

FL_SI

O

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

 

 

 

FL_SO

I

FLASH Serial Data Output. This pin is an input from the FLASH memory. It has an

internal pullup device.

 

 

 

 

 

3.4Miscellaneous Signals

3.4.1LED Signals

Symbol

Type

Name and Function

 

 

 

LED0 / LINK#

O

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

connectivity.

 

 

 

 

 

LED1 / ACT#

O

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

transmit or receive activity.

 

 

 

 

 

LED2 / LINK100#

O

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

100 Mbps.

 

 

 

 

 

LED3 / LINK1000#

O

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

1000 Mbps.

 

 

 

 

 

3.4.2Other Signals

Symbol

Type

Name and Function

 

 

 

 

 

Software Defined Pin. The Software Defined Pins are reserved and programmable

SDP[7:6]

 

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

SDP[1:0]

 

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.

 

 

 

Datasheet

13

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Image 19
Intel 82540EP manual Miscellaneous Signals, LED Signals, Other Signals