EMB-3581-COM
来自ARM Wiki
目录
COM1:
- COM1是一分二的COM,是CPU直接引出,分别对应设备:/dev/ttyS4、/dev/ttyS7
COM1 引脚定义
信号名称 Pin# Pin# 信号名称 NC 1 2 COM7_RX COM4_RX 3 4 COM7_TX COM4_TX 5 6 NC NC 7 8 NC GND 9 10 GND
JCOM(1-4):
- JCOM(1-4)是一分四COM,分别对应/dev/ttyVIZ0~3
- 其中1COM/2COM 支持 RS232/RS485 两种传输模式
- (J1、J2)跳线控制1COM 的 232/485切换
- (J3、J4)跳线控制2COM 的 232/485切换
JCOM(1-4)引脚定义
信号名称 Pin# Pin# 信号名称 JCOM1_D-(485 B) 1 2 NC JCOM1_RX(485 A) 3 4 JCOM1_RTS JCOM1_TX 5 6 JCOM1_CTS NC 7 8 NC GND 9 10 GND JCOM2_D- (485 B) 11 12 NC JCOM2_RX (485 A) 13 14 JCOM2_RTS JCOM2_TX 15 16 JCOM2_CTS NC 17 18 NC GND 19 20 GND NC 21 22 NC JCOM3_RX 23 24 JCOM3_RTS JCOM3_TX 25 26 JCOM3_CTS NC 27 28 NC GND 29 30 GND NC 31 32 NC JCOM4_RX 33 34 JCOM4_RTS JCOM4_TX 35 36 JCOM4_CTS NC 37 38 NC GND 39 40 GND
JCOM(1-4) 1COM 跳线232/485设置
- J1、J2:
JCOM(1-4) 1COM AS RS232 PORT COM2 1COM AS RS485 PORT J1 1-2 J1 3-4,5-6 J2 1-3,2-4 J2 3-5,4-6
JCOM(1-4) 2COM 跳线232/485设置
- J3、J4:
JCOM(1-4) 2COM AS RS232 PORT COM2 2COM AS RS485 PORT J3 1-2 J1 3-4,5-6 J4 1-3,2-4 J2 3-5,4-6