VSC8601 Datasheet
Functional Descriptions
Table 3.
LED Mode and Function Summary (continued)
Mode
Function Name
LED State and Description
2
Link100/activity
Link10/activity
1 = No link in 100BASE-TX.
0 = Valid 100BASE-TX link.
Blink or pulse-stretch = Valid 100BASE-TX link with activity present.
3
4
1 = No link in 10BASE-T.
0 = Valid 10BASE-T link.
Blink or pulse-stretch = Valid 10BASE-T link with activity present.
Link100/1000/activity 1 = No link in 100BASE-TX or 1000BASE-T.
0 = Valid 100BASE-TX or 1000BASE-T link.
Blink or pulse-stretch = Valid 100BASE-TX or 1000BASE-T link with activity
present.
5
6
Link10/1000/activity
Link10/100/activity
1 = No link in 10BASE-T or 1000BASE-T.
0 = Valid 10BASE-T or 1000BASET-T link.
Blink or pulse-stretch = Valid 10BASE-T or 1000BASE-T link with activity
present.
1 = No link in 10BASE-T or 100BASE-TX.
0 = Valid 10BASE-T or 100BASE-TX link.
Blink or pulse-stretch = Valid 10BASE-T or 100BASE-TX link with activity
present.
7
8
Reserved
Duplex/collision
1 = Link established in half-duplex mode, or no link established.
0 = Link established in full-duplex mode.
Blink or pulse-stretch = Link established in half-duplex mode but collisions are
present.
9
Collision
Activity
1 = No collision detected.
Blink or pulse-stretch = Collision detected.
10
1 = No activity present.
Blink or pulse-stretch = Activity present (becomes TX activity present if
register bit 30.14 is set to 1).
11
12
Reserved
Auto-negotiation fault 1 = No auto-negotiation fault present.
0 = Auto-negotiation fault occurred.
13
14
15
Reserved
Force LED off
Force LED on
1 = De-asserts the LED.
0 = Asserts the LED.
Revision 4.1
September 2009
Page 29
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
