ST EVALSP1310CPU, User Manual, Page: 18 / 36

Block descriptions UM1585
18/36 Doc ID 023872 Rev 1
4.5.2 Ethernet LEDs
Table 10. Ethernet LEDs
Reference Description
D1
Yellow
DUPLEX STATUS: The LED is lit when the PHY is in Full Duplex operation after
the link is established.
D2
Yellow
1000M SPEED AND GOOD LINK LED : The LED output indicates that the PHY
has established a good link at 1000 Mbps.
In 1000BASE-T mode, the link is established as a result of training, Auto-
Negotiation completed, valid 1000BASE-T link established and reliable reception
of signals transmitted from a remote PHY is received.
D3
Yellow
100M SPEED AND GOOD LINK LED : The LED output indicates that the PHY
has established a good link at 100 Mbps.
In 100BASE-T mode, the link is established as a result of an input receive
amplitude compliant with TP-PMD specifications which will result in internal
generation of Signal Detect. LINK100_LED will assert after the internal Signal
Detect has remained asserted for a minimum of 500 µs. LINK100_LED will de-
assert immediately following the de-assertion of the internal Signal Detect.
D4
Yellow
10M GOOD LINK LED : In the standard 5-LED display mode, this LED output
indicates that the PHY has established a good link at 10 Mbps.
D5
Yellow
ACTIVITY LED : The LED output indicates the occurrence of either idle error or
packet transfer.