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User Manual version 2503
LIBRA 120 III (PC620 Intel 815E)
4-59
4.1.5.10. COM3
COM 3 is an internal RS-232 reserved for touchscreen. Its
corresponding pin assignment is listed as below;
Pin #
Signal Pin #
Signal
1 DCD 2 DSR
3 RXD 4 RTS
5 TXD 6 CTS
7 DTR 8 RI
9 GND 10 VCC
4.1.5.11. CD1: CD Audio IN
Pin #
Signal
1 Left channel
2 CD GND
3 CD GND
4 Right channel
4.1.5.12. IR1: IR/CIR Connector
IR
Pin #
Signal
1 5V
2 NC
3 IRRX
4 GND
5 IRTX
6 CIRRX
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