查看“KD-18-COM”的源代码

==== COM引脚定义 ====
[[文件:KD-18-COM.jpg|500px|缩略图|KD-18-COM]]
=====COM1_2、COM3_4:=====
:*提供4个DB9公头RS232串口,COM1为DEBUG口
:{| class="wikitable"
|-
! 信号名称 !! colspan=2|Pin  !! 信号名称 
|-
| NC || 1 || 2 || RX
|-
| TX || 3 || 4 || NC
|-
| GND || 5 || 6 || NC
|-
| RTS || 7 || 8 || CTS
|-
| GND || 9 ||   || 
|}

=====COM485:=====
:{| class="wikitable"
|-
! 信号名称 !! colspan=2|Pin  !! 信号名称 
|-
| GND || A1 || B1 || GND
|-
| COM1_485+ || A2 || B2 || COM5_485+
|-
| COM1_485- || A3 || B3 || COM5_485-
|}