Register Descriptions

Table 13-60. LED Control Bit Description1

Field

Bit

Initial

Description

Value

 

 

 

 

 

 

 

LED0_MODE

3:0

0010b1

LED0/LINK# Mode. This field specifies the control source for the

 

 

 

LED0 output. An initial value of 0010b selects LINK_UP# indication.

 

 

 

 

Reserved

5:4

00b

Reserved. Read-only as 0b. Write as 0b for future compatibility.

 

 

 

 

 

 

 

LED0/LINK# Invert. This field specifies the polarity/ inversion of the

LED0_IVRT

6

0b1

LED source prior to output or blink control.

0b = do not invert LED source.

 

 

 

 

 

 

1b = invert LED source.

 

 

 

 

 

 

 

LED0/LINK# Blink. This field specifies whether to apply blink logic to

LED0_BLINK

7

0b1

the (possibly inverted) LED control source prior to the LED output.

0b = do not blink asserted LED output.

 

 

 

 

 

 

1b = blink asserted LED output.

 

 

 

 

LED1_MODE

11:8

0011b

LED1/ACTIVITY# Mode. This field specifies the control source for the

LED1 output. An initial value of 0011b selects ACTIVITY# indication.

 

 

 

 

 

 

 

Reserved

13:12

00b

Reserved. Read-only as 0b. Write as 0b for future compatibility.

 

 

 

 

LED1_IVRT

14

0b

LED1/ACTIVITY# Invert.

 

 

 

 

LED1_BLINK

15

1b

LED1/ACTIVITY# Blink.

 

 

 

 

LED2_MODE

19:16

0110b1

LED2/LINK100# Mode. This field specifies the control source for the

 

 

 

LED2 output. An initial value of 0011b selects LINK100# indication.

 

 

 

 

Reserved

21:20

00b

Reserved. Read-only as 0b. Write as 0b for future compatibility.

 

 

 

 

LED2_IVRT

22

0b1

LED2/LINK100# Invert.

LED2_BLINK

23

0b1

LED2/LINK100# Blink.

LED3_MODE

27:24

0111b

LED3/LINK1000# Mode. This field specifies the control source for the

LED3 output. An initial value of 0111b selects LINK1000# indication.

 

 

 

 

 

 

 

Reserved

29:28

00b

Reserved. Read-only as 0b. Write as 0b for future compatibility.

 

 

 

 

LED3_IVRT

30

0b

LED3/LINK1000# Invert.

 

 

 

 

LED3_BLINK

31

0b

LED3/LINK1000# Blink.

 

 

 

 

1. These bits are read from the EEPROM.

13.4.15.1MODE Encodings for LED Outputs1

The Table 13-61lists the MODE encodings used to select the desired LED signal source for each LED output. Refer to Section 10.1.1 to ensure proper understanding of expression polarity and resulting LED output polarity.

Note: All 16 modes listed are functional.

1.Not applicable to the 82544GC/EI.

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Software Developer’s Manual

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Intel PCI-X, Intel Gigabit Ethernet Controllers manual Mode Encodings for LED Outputs1, LED Control Bit Description1