View source for 串口（RS232 DB,RS232/485,Internal RS232）

=== '''RS232/Debug Port (COM2)''' ===

'''RSB-4680 can communicate with a host server (Windows or Linux) by using debug cable'''

{| border="1" cellspacing="1" cellpadding="1" style="width:500px;"
|-
| '''Pin'''
| '''Description'''
|-
| 1
| NC
|-
| 2
| COM2_TX<br/>
|-
| 3
| COM2_RX<br/>
|-
| 4
| GND<br/>
|}

[[File:Debug port.PNG]]

=== <span style="color:#FF0000;"></span>'''RS232/485 (COM4)'''<span style="color:#FF0000;"></span> ===

'''RSB-4680 provides one D-Sub 9-pin connector serial communication interface port. The port can support RS-232/485 mode communication.'''

{| border="1" cellspacing="1" cellpadding="1" style="width:500px;"
|-
| style="width: 113px;" | '''Pin'''
| style="width: 373px;" | '''Description'''
|-
| style="width: 113px;" | 1
| style="width: 373px;" | COM4_DCD_a<br/>
|-
| style="width: 113px;" | 2
| style="width: 373px;" | COM4_RX_a<br/>
|-
| style="width: 113px;" | 3
| style="width: 373px;" | COM4_TX_a<br/>
|-
| style="width: 113px;" | 4
| style="width: 373px;" | NC
|-
| style="width: 113px;" | 5
| style="width: 373px;" | GND
|-
| style="width: 113px;" | 6
| style="width: 373px;" | NC
|-
| style="width: 113px;" | 7
| style="width: 373px;" | COM4_RTS<br/>
|-
| style="width: 113px;" | 8
| style="width: 373px;" | COM4_CTS<br/>
|-
| style="width: 113px;" | 9
| style="width: 373px;" | NC
|}

<span style="color:#FF0000;">插一张COM Port图片</span>

=== '''Internal RS232 (COM)''' ===

'''RSB-4680 provides 2 x internal 4 wires RS-232 ports with 5V/12V selection. (Refer to Jumper CN6).'''

{| border="1" cellspacing="1" cellpadding="1" style="width:500px;"
|-
| '''Pin&nbsp;'''
| '''Description'''
|-
| 1
| COM6_TXD<br/>
|-
| 2
| COM6_RXD<br/>
|-
| 3
| COM6_RTS#<br/>
|-
| 4
| COM6_CTS#<br/>
|-
| 5
| COM6_PWR<br/>
|-
| 6
| GND<br/>
|-
| 7
| GND<br/>
|-
| 8
| COM7_PWR<br/>
|-
| 9
| COM7_CTS#<br/>
|-
| 10
| COM7_RTS#<br/>
|-
| 11
| COM7_RXD<br/>
|-
| 12
| COM7_TXD<br/>
|}

<span style="color:#FF0000;">插一张Internal RS232 Pin Header1图片</span>

=== '''Internal RS232 (COM13)''' ===

'''RSB-4680 provides 2 x internal 4 wires RS-232 ports.'''

{| border="1" cellspacing="1" cellpadding="1" style="width:500px;"
|-
| '''Pin'''
| '''Description'''
|-
| 1
| COM1_TXD<br/>
|-
| 2
| COM1_RXD<br/>
|-
| 3
| COM1_RTS#<br/>
|-
| 4
| COM1_CTS#<br/>
|-
| 5
| NC<br/>
|-
| 6
| GND<br/>
|-
| 7
| GND<br/>
|-
| 8
| NC<br/>
|-
| 9
| COM3_CTS#<br/>
|-
| 10
| COM3_RTS#<br/>
|-
| 11
| COM3_RXD<br/>
|-
| 12
| COM3_TXD<br/>
|}

<span style="color:#FF0000;">插一张Internal RS232 Pin header2 图片</span>