User`s manual

SBC86831 Series All-In-One Mini ITX Board User’s Manual
Jumpers and Connectors
10
2.3.1 COM1 Mode Select Jumper: JP1
These jumpers select the COM1 port’s communication mode to
operate RS-232 or RS-422/485.
Options Settings
RS-232 Short 1-2 (Default)
RS-422 Short 3-4
RS-485 Short 5-6,7-8
JP1
1
3
5
7
2
4
6
8
2.3.2 COM1 Mode Select Jumper: JP2
Options Settings
RS-485 Short 1-3,2-4
RS-232 Short 3-5,4-6 (Default)
JP2
2
4
6
1
3
5
2.3.3 COM1 Mode Selec Jumper: JP3
Options Settings
RS-485 Short 1-3,2-4
RS-232 Short 3-5,4-6(Default)
JP3
2
4
6
1
3
5
2.3.4 COM1~COM4 Mode Select for Type Jumpers:
JP4, JP5, JP6, JP7
These jumpers select the COM1, COM2, COM3, COM4 ports’
DCD and RI mode.
JP4, JP5, JP6, JP7