查看“MITX-6986-COM”的源代码

[[文件:MITX-6986-COM.jpg|600px|缩略图|MITX-6986-COM]]
===== COM1 RS232： =====
:{| 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/RS485时，其管脚定义如下： '''
:{| class="wikitable"
|-
! Pin !! RS232（默认） !! RS485
|-
| 1 || DCD || DATA-
|-
| 2 || RXD || DATA+
|-
| 3 || TXD || NC
|-
| 4 || DTR || NC
|-
| 5 || GND || GND
|-
| 6 || DSR || NC
|-
| 7 || RTS || NC
|-
| 8 || CTS || NC
|-
| 9 || RI || NC
|}