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Mini-ITX Mainboard Manual
JSEL3_1: Voltage Switch Header for JCOM1A (Pin1~6)
JSEL3_1: RS-232/422/485 Switch Header for JCOM1A (Pin7~12)
This header is for controlling the 9Pin of JCOM1A to switch 5V or 12V, and
determines that JCOM1A belongs to RS-232, 422, or 485.
JSEL4: Voltage Switch Header for JCOM1B *
This header is for controlling the 9Pin of JCOM1B to switch 5V or 12V.
14
1-2
3-4
5-6
7-8
9-10
11-12
3
1
Pin 1-2 Close:
+5V (Default)
Pin 2-3 Close:
+12V
-PRI (Default)
+5V
+12V
RS-232 (Default)
RS-422
RS-485
3
1
3
1
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