PEX 8648-AA RDK Hardware Reference Manual, Version 1.2
Copyright © 2010 by PLX Technology, Inc. All rights reserved
17
3.5.1
PORT STATUS LED Indicators
The
PORT STATUS
indicators (refer to
Figure 16
) are
green
LEDs that are driven by the PEX 8648 switch’s
PEX_PORT_GOOD[11:0]# balls.
Table 2
describes the relationship of the LED On/Off patterns as they relate to
Port status.
Table 2. PEX 8648 Switch Port Status LED On/Off Patterns, by State
State
LED Pattern
Link is down
Off
Link is up, 5 GT/s, all Lanes are up
On
Link is up, 5 GT/s, reduced Lanes are up
Blinking, 0.5 seconds On, 0.5 seconds Off
Link is up, 2.5 GT/s, all Lanes are up
Blinking, 1.5 seconds On, 0.5 seconds Off
Link is up, 2.5 GT/s, reduced Lanes are up
Blinking, 0.5 seconds On, 1.5 seconds Off
3.5.2
UP PORT LED Indicators
The upstream Port (
UP PORT
) indicators (refer to
Figure 16
) are
green
LEDs that indicate which Port is assigned
as the upstream Port. By default, Port 0 is the assigned upstream Port on the PEX 8648 RDK base board.
3.5.3
NT PORT LED Indicators
The
NT PORT
indicators (refer to
Figure 16
) are
green
LEDs that indicate which Port is assigned as the NT Port.
Only Station 0 Ports – Ports 0, 1, 2, or 3 – can be assigned as the NT Port. By default, Port 1 is the assigned
NT Port on the PEX 8648 RDK base board.
