User`s manual

MANO831 Mini ITX Board
Board and Pin Assignments 9
2.2.3 COM4 RS-232/422/485 Mode Setting (JP4, JP5, JP6)
This jumper allows you to select the operation mode of COM port 4.
2.2.4 COM3 RI/+5V/+12V Selection (JCOMPWR3)
This jumper allows you to select the power mode of COM port 3.
2.2.5 COM4 RI/+5V/+12V Selection (JCOMPWR4)
This jumper allows you to select the power mode of COM port 4.
2.2.6 LVDS Backlight Power Selection (JLVDS_P1)
This jumper allows you to select LVDS backlight power.
Function
Setting
RS-232 mode
(Default)
JP4 1-3, 2-4 close
JP5 1-2 close
JP6 1-3, 2-4 close
RS-422 mode
JP4 3-5, 4-6 close
JP5 3-4 close
JP6 3-5, 4-6 close
RS-485 mode
JP4 3-5, 4-6 close
JP5 5-6 close
JP6 3-5, 4-6 close
Function
Setting
+12V
1-2 close
RI (Default)
3-4 close
+5V
5-6 close
Function
Setting
+12V
1-2 close
RI (Default)
3-4 close
+5V
5-6 close
Function
Setting
+5V
1-2 close
+3.3V (Default)
2-3 close