EMB-3550-COM
来自ARM Wiki
目录
COM1跳线功能设置(J3、J4):
| COM1 AS RS232 PORT | COM1 AS RS485 PORT | ||
|---|---|---|---|
| J3 | 1-3,2-4 | J3 | 3-5,4-6 |
| J4 | 1-2 | J3 | 3-4,5-6 |
COM1-COM4(传输模式为 RS232):
| 信号名称 | Pin# | Pin# | 信号名称 |
|---|---|---|---|
| NC | 1 | 2 | NC |
| COM_RX | 3 | 4 | COM_RTS |
| COM_TX | 5 | 6 | COM_CTS |
| NC | 7 | 8 | NC |
| GND | 9 | 10 | GND |
COM_DB(传输模式为 RS232):
| 信号名称 | Pin# | Pin# | 信号名称 |
|---|---|---|---|
| NC | 1 | 2 | NC |
| COM_RX | 3 | 4 | NC |
| COM_TX | 5 | 6 | NC |
| NC | 7 | 8 | NC |
| GND | 9 | 10 | GND |
当 COM1 设置为RS232 时,主板插针定义:
| Pin# | RS232(默认) |
|---|---|
| 1 | NC |
| 2 | NC |
| 3 | COM_RXD |
| 4 | COM_RTS |
| 5 | COM_TXD |
| 6 | COM_CTS |
| 7 | NC |
| 8 | NC |
| 9 | GND |
| 10 | GND |
当 COM1 设置为RS485 时,主板插针定义:
| Pin# | RS485 |
|---|---|
| 1 | COM_ DATA - |
| 2 | NC |
| 3 | COM_DATA+ |
| 4 | NC |
| 5 | NC |
| 6 | NC |
| 7 | NC |
| 8 | NC |
| 9 | GND |
| 10 | GND |