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Chapter 2
Serial Port Connector: COM 2/3/4
COM2/3/4 pin headers can be used to attach additional ports for serial mouse
or other serial devices.
Pin
Signal
1
RIN12
3
DOUT22
5
GND
7
DOUT12
9
XRI2#
Pin
Signal
1
RIN13
3
DOUT23
5
GND
7
DOUT13
9
XRI3#
Pin
Signal
1
RIN14
3
DOUT24
5
GND
7
DOUT14
9
XRI4#
Pin
Signal
2
RIN32
4
DOUT32
6
RIN22
8
RIN42
10
Key
Pin
Signal
2
RIN33
4
DOUT33
6
RIN23
8
RIN43
10
Key
Pin
Signal
2
RIN34
4
DOUT34
6
RIN24
8
RIN44
10
Key
16
COM2
1
2
9
10
COM3
1
2
9
10
COM4
1
2
9
10
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