查看“EMB-3680-COM”的源代码

[[文件:EMB-3680 COM1、COM2、COM3、COM4.jpg|600px|缩略图|EMB-3680 COM1、COM2、COM3、COM4]]
===== COM1： =====
{| class="wikitable"
|-
! 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RS232/RS422/RS485时，其管脚定义如下： =====
{| class="wikitable"
|-
! 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）： =====
{| class="wikitable"
|-
|colspan=2|COM2  RS232 PORT ||colspan=2|COM2  RS422 PORT   ||colspan=2|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： =====
{| class="wikitable"
|-
! 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
|}