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AS-C74 User’s Manual

2.13 <Serial Port>

The board supports Three RS232 serial port and one jumper selectable RS232/422/485

serial ports. The jumper JCSEL1 & JCSEL2 can let you configure the communicating

modes for COM2.

Connector: COM2

Type: 9-pin header connector for COM2

Pin Description Pin Description

1 DCD/422TX-/485- 2 RXD/422TX+/485+

3 TXD/422RX+ 4 DTR/422RX-

5 GND 6 DSR

7 RTS 8 CTS

9 RI 10 N/C

COM1

COM3

COM2

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 50 51

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