查看“BPC-7977 COM”的源代码

[[文件:BPC-7977 COM1，COM2.jpg|600px|缩略图|BPC-7977 COM1，COM2]]
===== COM1： =====
{| class="wikitable"
|-
! Pin !! 信号名称 
|-
| 1 || HDCD#1TX-DATA-
|-
| 2 || HSIN1TX+DATA+
|-
| 3 || HSOUT1RX+
|-
| 4 || HDTR#1RX
|-
| 5 || GND
|-
| 6 || COM1_DSR#
|-
| 7 || COM1_RTS#
|-
| 8 || COM1_CTS#
|-
| 9 || COM1_RI_L
|}

===== COM2： =====
{| class="wikitable"
|-
! 信号名称 !! Pin !! Pin !! 信号名称 
|-
| HDCD#2TX-DATA- || 1 || 2 || COM2_DSR#
|-
| HSIN2TX+DATA+ || 3 || 4 || COM2_RTS#
|-
| HSOUT2RX+ || 5 || 6 || COM2_CTS#
|-
| HDTR#2RX || 7 || 8 || COM2_RI_L
|-
| GND || 9 || 10 || GND		
|}

===== COM1 跳线功能设置（J1，J2，J3）： =====
{| class="wikitable"
|-
|colspan=2|COM1  RS232 PORT ||colspan=2|COM1  RS422 PORT   ||colspan=2|COM1  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
|}

===== 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
|}