EMB-4922-COM
来自ARM Wiki
COM2:
信号名称 Pin Pin 信号名称 DCD 1 2 DSR SIN 3 4 RTS SOUT 5 6 CTS DTR 7 8 RI GND 9 10 GND
- COM2 跳线功能设置(J5,J6,J8):
COM2 AS RS232 PORT COM2 AS RS422 PORT COM2 AS RS485 PORT J5 1-3,2-4 J5 3-5,4-6 J5 ------- J6 1-3,2-4 J6 3-5,4-6 J6 3-5,4-6 J8 1-2 J8 3-4 J8 5-6 7-8
当COM2设置为RS485/RS422/ RS232时,其管脚定义分别如下:
RS485 RS422 RS232 Pin Pin RS232 RS422 RS485 DATA- TX- DCD 1 2 DSR NC NC DATA+ TX+ RXD 3 4 RTS NC NC NC RX+ TXD 5 6 CTS NC NC NC RX- DTR 7 8 RI NC NC GND GND GND 9 10 GND GND GND