ATX-6993 COM
来自ARM Wiki
COM1、COM2:
Pin | 信号名称 |
---|---|
1 | DCD |
2 | RXD |
3 | TXD |
4 | DTR |
5 | GND |
6 | DSR |
7 | RTS |
8 | CTS |
9 | RI |
当COM2设置为R232/RS422/RS485时,COM2 PIN脚定义:
Pin | RS232(默认) | RS422 | RS485 |
---|---|---|---|
1 | DCD | TX- | DATA- |
2 | RXD | TX+ | DATA+ |
3 | TXD | RX+ | NC |
4 | DTR | RX- | NC |
5 | GND | GND | GND |
6 | DSR | NC | NC |
7 | RTS | NC | NC |
8 | CTS | NC | NC |
9 | RI | GND | GND |
COM3-COM6:
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 | COM_PIN10 |
J9:
Pin | 信号名称 |
---|---|
1 | +5V |
2 | COM_PIN10 |
3 | +12V |