RTL8169
2002/03/27 Rev.1.21
61
9.6 LED Functions
The RTL8169 supports 4 LED signals in 4 different configurable operation modes. The following sections describe the different
LED actions.
9.6.1 Link Monitor
The Link Monitor senses the link integrity or if a station is down, such as LINK10, LINK100, LINK1000, LINK10/100/1000,
LINK10/ACT, LINK100/ACT, or LINK1000/ACT. Whenever link status is established, the specific link LED pin is driven low.
Once a cable is disconnected, the link LED pin is driven high indicating that no network connection exists.
9.6.2 Rx LED
In 10/100/1000Mbps mode, blinking of the Rx LED indicates that receive activity is occurring.
Power On
Receiving
Packet?
LED = High
LED = High for (100 +- 10) ms
LED = Low for (12 +- 2) ms
No
Yes
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