MITX-6932-COM
来自ARM Wiki
文件:MATX-6920 COM1，COM2，COM3-COM6.jpg
MATX-6920 COM1，COM2，COM3-COM6
COM1、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 |
当COM2设置为RS232/RS422/RS485时，其管脚定义如下：
| Pin | RS232（默认） | RS422 | RS485 |
|---|---|---|---|
| 1 | DCD | TX- | DATA- |
| 2 | DSR | NC | NC |
| 3 | RXD | TX+ | DATA+ |
| 4 | RTS | NC | NC |
| 5 | TXD | RX+ | NC |
| 6 | CTS | NC | NC |
| 7 | DTR | RX- | NC |
| 8 | RI | NC | NC |
| 9 | GND | GND | GND |
| 10 | GND | GND | GND |
COM2 跳线功能设置（J4，J5，J6）：
| COM2 RS232 PORT | COM2 RS422 PORT | COM2 RS485 PORT | |||
| J4 | 1-3 2-4 | J4 | 3-5 4-6 | J4 | 3-5 4-6 |
| J5 | 1-3 2-4 | J5 | 3-5 4-6 | J5 | 3-5 4-6 |
| J6 | 1-2 | J6 | 3-4 | J6 | 5-6 7-8 |
COM3-COM6：
| 信号名称 | Pin | Pin | 信号名称 |
|---|---|---|---|
| DCD3 | 1 | 2 | DSR3 |
| RXD3 | 3 | 4 | RTS3 |
| TXD3 | 5 | 6 | CTS3 |
| DTR3 | 7 | 8 | RI3 |
| GND | 9 | 10 | GND |
| DCD4 | 11 | 12 | DSR4 |
| RXD4 | 13 | 14 | RTS4 |
| TXD4 | 15 | 16 | CTS4 |
| DTR4 | 17 | 18 | RI4 |
| GND | 19 | 20 | GND |
| DCD5 | 21 | 22 | DSR5 |
| RXD5 | 23 | 24 | RTS5 |
| TXD5 | 25 | 26 | CTS5 |
| DTR5 | 27 | 28 | RI5 |
| GND | 29 | 30 | GND |
| DCD6 | 31 | 32 | DSR6 |
| RXD6 | 33 | 34 | RTS6 |
| TXD6 | 35 | 36 | CTS6 |
| DTR6 | 37 | 38 | RI6 |
| GND | 39 | 40 | GND |