Technical data

Controls, LEDs, and Connectors

COMX-CAR-610 COM Express Carrier Board Installation and Use (6806800K26D)

3.4.7.4 Serial Ports

You need to set jumpers P34 and P41 to configure the serial ports defined above as RS-232 or

RS-422/485 ports.

Table 3-25 P18—P23, RS-232 Headers Pin Definition

Pin Signal Pin Signal

1DCD_N 2RXD

3TXD 4DTR

5GND 6DSR_N

7 RTS_N 8 CTS_N

9RI_N 10Key

Table 3-26 P37 and P33, RS-422/RS-485 Headers Pin Definition

Pin Signal

1 RS422_RX_N

2 RS422_RX_P

3 RS422_TX_N/RS485_N

4 RS422_TX_P/RS485_P

Table 3-27 Set Jumpers P34 and P41

Jumper Setting Configuration

P34/P41 (1-2) RS232 (Default)

P34/P41 (3-4) RS422

P34/P41 (5-6) RS485