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286 Software Developer’s Manual
Register Descriptions
Table 13-60. LED Control Bit Description
1
13.4.15.1 MODE Encodings for LED Outputs
1
The Table 13-61 lists 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.
Field Bit
Initial
Value
Description
LED0_MODE 3:0 0010b
1
1. These bits are read from the EEPROM.
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_IVRT 6 0b
1
LED0/LINK# Invert. This field specifies the polarity/ inversion of the
LED source prior to output or blink control.
0b = do not invert LED source.
1b = invert LED source.
LED0_BLINK 7 0b
1
LED0/LINK# Blink. This field specifies whether to apply blink logic to
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 0110b
1
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 0b
1
LED2/LINK100# Invert.
LED2_BLINK 23 0b
1
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. Not applicable to the 82544GC/EI.