Asus SAMRT3000 V5 Q670 Manual page 18

3. COM1/3 Ring/+5V/+12V selection jumpers (6-pin COM1_SEL, COM3_
SEL)
These jumpers allow you to select 5V or 12V depending on your COM
device.
A
B
Setting
+12V
+5V
Ring (Default)
Connector type
Chapter 2: Motherboard information
HEADER 2x3p, 2.54mm pitch, S/T
COM1_SEL
A
2 1 4 3
+12V +5V
COM3_SEL
B
2 4
6
3
1
5
+12V +5V
Pins
1-2
3-4
5-6
6 5
RI
(Default)
RI
(Default)
2-11