EMB-3700-COM
来自ARM Wiki
COM1接口定义
| Pin |
信号名称
|
| 1 |
DCD
|
| 2 |
RXD
|
| 3 |
TXD
|
| 4 |
DTR
|
| 5 |
GND
|
| 6 |
DSR
|
| 7 |
RTS
|
| 8 |
CTS
|
| 9 |
RI
|
COM2接口定义
| 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RS485/RS422/ RS232时，其管脚定义分别如下
| RS485 |
RS422 |
RS232 |
管脚 |
管脚 |
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
|
COM2 跳线功能设置(J1、J2、J3)
- (J1, J2,J3)跳线用来设置 COM2 的传输模式, COM2 支持 RS232/RS422/RS485 三种传输模式,您可以根据您自身的需求来选择设置,默认传输模式为 RS232。
- J1、J2、J3:
| COM2 AS RS232 PORT |
COM2 AS RS422 PORT |
COM2 AS RS485 PORT
|
| J1 |
1-3,2-4 |
J1 |
3-5,4-6 |
J1 |
3-5,4-6
|
| J2 |
1-3,2-4 |
J2 |
3-5,4-6 |
J2 |
3-5,4-6
|
| J3 |
1-2 |
J3 |
3-4 |
J3 |
5-6 7-8
|