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82571EB/82572EI EEPROM Information Guide
18
Note:
The LINK/ACTIVITY source functions are slightly different from the others when BLINK is
enabled. The LED is off if there is no LINK, on if there is LINK and no ACTIVITY, and blinks if
there is LINK and ACTIVITY.
Note:
Asserted = active low.
NOTE:
1. The dynamic LED modes (Link/Activity and Activity) should be used with LED Blink mode enabled.
Bit
Name
Description
4
Reserved
Reserved. Set to 0b.
3:0
LED1 Mode
Initial value of the LED1_MODE field specifying what event/state/pattern
is displayed on the LED1 (ACTIVITY) output. A value of 0011b (3h)
indicates the ACTIVITY state. See
for all available LED modes.
a.
When LED Blink mode is enabled, the appropriate LED Invert bit should be set to 0b.
Table 17. LED Modes
Mode
Selected Mode
Source Indication
0000b
LINK_10/1000
Asserted when either 10 or 1000 Mb/s link is established and
maintained.
0001b
LINK_100/1000
Asserted when either 100 or 1000 Mb/s link is established and
maintained.
0010b
LINK_UP
Asserted when any speed link is established and maintained.
0011b
FILTER_ACTIVITY
Asserted when link is established and packets are being
transmitted or received that passed MAC filtering.
0100b
LINK/ACTIVITY
Asserted when link is established AND when there is NO
transmit or receive activity.
0101b
LINK_10
Asserted when a 10 Mb/s link is established and maintained.
0110b
LINK_100
Asserted when a 100 Mb/s link is established and maintained.
0111b
LINK_1000
Asserted when a 1000 Mb/s link is established and maintained.
1000b
SDP_MODE
LED activation is a reflection of the SDP signal. SDP0, SDP1,
SDP2, SDP3 are reflected to LED0, LED1, LED2, LED3,
respectively.
1001b
FULL_DUPLEX
Asserted when the link is configured for full duplex operation.
1010b
COLLISION
Asserted when a collision is observed.
1011b
ACTIVITY
Asserted when link is established and packets are being
transmitted or received.
1100b
BUS_SIZE
Asserted when the device detects a 1 Lane PCIe* connection.
1101b
PAUSED
Asserted when the device’s transmitter is flow controlled.
1110b
LED_ON
Always asserted.
1111b
LED_OFF
Always de-asserted.
Table 16. LED 1-3 Configuration Defaults (Word 1Ch)