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COM Port RI & Voltage Selection
JP_COM1, JP_COM2, JP_COM3, JP_COM4: Pin-headers on board
SELECTION JUMPER
SETTING
RI
+12V
+5V
Caution:
1. Voltage of external COM 1~ 4 ports are made to control on BIOS for your convenience.
The corresponding jumpers JP_COM1~4 are set open (no connection) by default;
refer to Voltage Adjust Configuration for detailed jumper setting (BIOS default at Disable).
2. JP_COM1~4 are enabled when COM1~4 voltage adjustment is disabled on BIOS
3. Voltage of COM port is adjustable by BIOS or jumpers. Either way cannot be applied
simultaneously in case of system error, component damage or serious boot failure.
PS: COM4 is optional
PA-6822 Series User Manual
JUMPER ILLUSTRATION
2
1-2
1
JP_COM1
2
3-4
1
JP_COM1
2
5-6
1
JP_COM1
Chapter 2 System Configuration
6
2
6
5
1
5
JP_COM2
2
6
6
1
5
5
JP_COM2
6
2
6
5
1
5
JP_COM2
2
6
2
1
5
1
JP_COM3
JP_COM4
2
6
2
1
5
1
JP_COM3
JP_ COM4
2
2
6
1
1
5
JP_ COM4
JP_COM3
6
5
6
5
6
5
Page 26
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