ELSKY QM8U Podręcznik - Strona 14
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SHENZHEN ELSKY TECHNOLOGY
2.6
Serial port(COM) function and pin definition
The motherboard supports the standard RS232 6COM motherboard, and the COM1 can optionally
support RS485 and RS422 through THE BIOS setting.
The 9th pin of COM1/2 can change the jumper Settings via JCOM1/JCOM2, selecting the 9th pin to
output +5V or +12V voltage.
item：JCOM1 （2*3Pin，2.0mm）
pin
The 9th pin of COM1 is
charged
1-2short
+5V
circuit
3-4short
+12V
circuit
5-6short
Without electricity（by
circuit
default）
2.6.1 COM1/2 pin
item：COM1/2（2*5Pin，2.54mm）
pin
Definition
1
DCD
3
TXD
5
GND
7
RTS
9
RI
item：JCOM2 （2*3Pin，2.0mm）
pin
1-2short
circuit
3-4short
circuit
5-6short
Without electricity（by default）
circuit
：
definition
pin
2
4
6
8
10
- 14 -
CO.,LTDwww.miniboard.cn
：
The 9th pin of COM2 is charged
+5V
+12V
Definition
RXD
DTR
DSR
CTS
NC
Pin item picture
Pin item picture