Com1 Data/Power Selection (Jp12) - AXIOMTEK CAPA841 User Manual

CAPA841/842 Capa Board
2.3.9

COM1 Data/Power Selection (JP12)

The COM1 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. You can change the communication mode
(RS-232/422/485) via BIOS setting, see section 4.4.
Function
Power: Set COM1 pin 1 to +5V level
Data: Set COM1 pin 1 to DCD (Default)
Power: Set COM1 pin 9 to +12V level
Data: Set COM1 pin 9 to RI (Default)
12
Setting
1-3 close
3-5 close
2-4 close
4-6 close
Board and Pin Assignments