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2804040 User’s Manual Hardware Setup
2.15 <Serial Port>
The board has two RS232 serial ports on real I/O panel, and onboard one 3-pin additional
TXD/RXD connector for POS application.
Connector: CN_TXD/RXD
Connector type: onboard 3-pin header (pitch = 2.00mm)
Pin Number Pin Assignment
1 TXD
2 RXD
3 Ground
CN_TXD/RXD
1
3
COM2
COM1
Serial Port 31