Fast Ethernet 10/100 Hex Transceiver with Full MII — LXT9763
Table 51. LED Configuration Register (Address 20, Hex 14)
Bit
Name
Description
Type 1
Default
0000 = Display Speed Status (Continuous, Default)
0001 = Display Transmit Status (Stretched)
0010 = Display Receive Status (Stretched)
0011 = Display Collision Status (Stretched)
0100 = Display Link Status (Continuous)
0101 = Display Duplex Status (Continuous)5
0110 = Reserved
LED1
0111 = Display Receive or Transmit Activity (Stretched)
1000 = Test mode- turn LED on (Continuous)
1001 = Test mode- turn LED off (Continuous)
1010 = Test mode- blink LED fast (Continuous)
1011 = Test mode- blink LED slow (Continuous)
1100 = Display Link and Receive Status combined 2 (Stretched)3
1101 = Display Link and Activity Status combined 2 (Stretched)3
1110 = Display Duplex and Collision Status combined 4 (Stretched)3,5
1111 = Reserved
20.15:12
R/W
0000
Programming
bits
0000 = Display Speed Status
0001 = Display Transmit Status
0010 = Display Receive Status
0011 = Display Collision Status
0100 = Display Link Status (Default)
0101 = Display Duplex Status
0110 = Reserved
0111 = Display Receive or Transmit Activity
1000 = Test mode- turn LED on
LED2
20.11:8
R/W
0100
Programming
bits
1001 = Test mode- turn LED off
1010 = Test mode- blink LED fast
1011 = Test mode- blink LED slow
1100 = Display Link and Receive Status combined 2 (Stretched)3
1101 = Display Link and Activity Status combined 2 (Stretched)3
1110 = Display Duplex and Collision Status combined 4 (Stretched)3,5
1111 = Reserved
0000 = Display Speed Status
0001 = Display Transmit Status
0010 = Display Receive Status (Default)
0011 = Display Collision Status
0100 = Display Link Status
0101 = Display Duplex Status5
0110 = Reserved
0111 = Display Receive or Transmit Activity
1000 = Test mode- turn LED on
LED3
20.7:4
R/W
0010
Programming
bits
1001 = Test mode- turn LED off
1010 = Test mode- blink LED fast
1011 = Test mode- blink LED slow
1100 = Display Link and Receive Status combined 2 (Stretched)3
1101 = Display Link and Activity Status combined 2 (Stretched)3
1110 = Display Duplex and Collision Status combined 4 (Stretched)3,5
1111 = Reserved
1. R/W = Read /Write.
2. Link status is the primary LED driver. The LED is asserted (solid ON) when the link is up.
The secondary LED driver (Receive, Activity or Isolate) causes the LED to change state (blink).
3. Combined event LED settings are not affected by Pulse Stretch bit 20.1. These display settings are stretched regardless of
the value of 20.1.
4. Duplex status is the primary LED driver. The LED is asserted (solid ON) when the link is full duplex.
Collision status is the secondary LED driver. The LED changes state (blinks) when a collision occurs.
5. Duplex LED maybe active for a brief time after loss of link.
Datasheet
71
INTEL [ INTEL ]
