查看“EMB-3550-COM”的源代码

====COM1跳线功能设置(J3、J4):====
[[文件:EMB-3550-J3-J4.jpg|500px|缩略图|EMB-3550-COM]]
{| class="wikitable"
|-
! colspan="2"|COM1 AS RS232 PORT!! colspan="2"|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):====
<!--
[[文件:EMB-3550-COM.jpg|300px|缩略图|EMB-3550-COM]]
-->
{| class="wikitable"
|-
! 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):====
{| class="wikitable"
|-
! 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: ====

{| class="wikitable"
|-
! 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: ====

{| class="wikitable"
|-
! Pin# !! RS485 
|-
|1 ||  COM_ DATA -
|-
| 2 || NC
|-
| 3 || COM_DATA+
|-
| 4 ||  NC
|-
| 5 || NC
|-
| 6 || NC
|-
| 7 ||  NC
|-
| 8 ||  NC
|-
| 9 ||  GND
|-
| 10 ||  GND
|}