Hardware Configuration
ROBO-8712VLA User’s Manual
2-10
J27: Hard Disk Drive LED Connector
PIN No.
Signal Description
1
+5V (390 ohm pull-up for HDD LED+)
2
HDD Active # (HDD LED-)
J28: External Speaker Connector
PIN No.
Signal Description
1
Speaker Signal Output (Open-drain w/
internal series 33 Ohm)
2
N/C
3
Ground
4
+5V
Note:
The pull-high voltage of external speaker is limited at 5V maximum.
J29: ATX Power Control Connector
PIN No.
Signal Description
1
ATX Power Good Signal (PW-OK)
2
ATX 5V Stand-by (5VSB)
3
ATX Power On Control (PS-ON)
4
Ground
J30: Power LED and Keyboard Lock Connector
PIN No.
Signal Description
1
+5V (470 Ohm pull-up for power LED+)
2 N/C
3
Ground (For Power LED-)
4
Keyboard Lock Signal Input (Active low)
5 Ground
