LAN83C183 Datasheet, PDF (37/113 Pages) SMSC Corporation – FAST ETHERNET PHYSICAL LAYER DEVICE

Function select bits (LED_DEF[1:0]) in the MI serial port Configuration register
determine the states of the pins, as indicated in Table 1.9 and Table 1.10.
Table 1.9 LED Normal Function Definition
LED_DEF[1:0] PLED5n PLED4n
PLED3n
PLED2n PLED1n PLED0n
0b11
RCV ACT XMT ACT
LINK
COL
FDX
10/100
0b10
RCV ACT XMT ACT
LINK
ACT
FDX
10/100
0b01
RCV ACT XMT ACT LINK + ACT
COL
FDX
10/100
0b00¹
RCV ACT XMT ACT LINK 100
ACT
FDX
LINK10
1. The LAN83C183 powers up with the LED_DEF[1:0] bits set to the default value of 0b00.
The default Normal Functions for PLED[5:0]n are Receive Activity, Transmit Activity,
Link 100, Activity, Full Duplex, and Link 10, respectively.
Table 1.10 LED Event Definition
Symbol
RCV ACT
XMT ACT
LINK
LINK+ACT
ACT
LINK100
COL
FDX
10/100
LINK10
Definition
Receive activity occurred, stretch pulse to 100 ms
Transmit activity occurred, stretch pulse to 100 ms
100 or 10 Mbits/s link detected
100 or 10 Mbits/s link detected or activity occurred, stretch
pulse to 100 ms (link detect causes LED to be on, activity
causes LED to blink)
Activity occurred, stretch pulse to 100 ms
100 Mbit/s link detected
Collision occurred, stretch pulse to 100 ms
Full-Duplex mode enabled
10 Mbits/s mode enabled (HIGH), or 100 Mbits/s mode
enabled (LOW)
10 Mbits/s link detected
SMSC DS – LAN83C183
37
Rev. 12/14/2000