Intel 2804040 user manual Serial Port, Pin Number Pin Assignment

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

1TXD

2RXD

3Ground

CN_TXD/RXD

1

3

COM2

COM1

Serial Port 31