User`s manual

CAPA831 Intel
®
Atom
TM
D2550/N2800/N2600 Processor 3.5” SBC
Board and Pin Assignments 11
2.3.5 COM1 RS-232/422/485 Mode Setting (JP8, JP9, JP10)
Use these jumpers to set COM1 port to operate as RS-232, RS-422 or RS-485
communication mode. When these jumpers are set to operate as RS-422 or RS485,
please make sure COM1 is on data mode (see section 2.3.10)
2.3.6 COM4 Data/Power Selection (JP11)
The COM4 port has +5V level power capability on DCD and +12V level on RI by setting
this jumper.
2.3.7 COM3 Data/Power Selection (JP12)
The COM3 port has +5V level power capability on DCD and +12V level on RI by setting
this jumper.
2.3.8 COM2 Data/Power Selection (JP13)
The COM2 port has +5V level power capability on DCD and +12V level on RI by setting
this jumper. When this port is set to +5V or +12V level, please make sure its
communication mode is RS-232 (see section 2.3.4).
Function
Setting
RS-232 mode
(Default)
JP8 1-2 close
JP9 3-5, 4-6 close
JP10 3-5, 4-6 close
RS-422 mode
JP8 3-4 close
JP9 1-3, 2-4 close
JP10 1-3, 2-4 close
RS-485 mode
JP8 5-6 close
JP9 1-3, 2-4 close
JP10 1-3, 2-4 close
Function
Setting
Power: Set CN9 pin 11 to +5V level
1-3 close
Data: Set CN9 pin 11 to DCD (Default)
3-5 close
Power: Set CN9 pin 18 to +12V level
2-4 close
Data: Set CN9 pin 18 to RI (Default)
4-6 close
Function
Setting
Power: Set CN9 pin 1 to +5V level
1-3 close
Data: Set CN9 pin 1 to DCD (Default)
3-5 close
Power: Set CN9 pin 8 to +12V level
2-4 close
Data: Set CN9 pin 8 to RI (Default)
4-6 close
Function
Setting
Power: Set CN11 pin 1 to +5V level
1-3 close
Data: Set CN11 pin 1 to DCD (Default)
3-5 close
Power: Set CN11 pin 8 to +12V level
2-4 close
Data: Set CN11 pin 8 to RI (Default)
4-6 close