Jumpers And Connectors; Clear Cmos (J1); System Temperature Thermal Sensor (J2); Audio Output Select (J5) - Aaeon PCM-6890 User Manual

Connectors on the board link it to external devices such as hard
disk drives, a keyboard, or floppy drives. In addition, the board
has a number of jumpers that allow you to configure your system
to suit your application.
The following tables list the function of each of the board's

jumpers and connectors.

Label
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
SW1 (4~6)
SW1 (2~3)
10 PCM-6890 User Manual
Function
Clear CMOS
System temperature thermal sensor
COM4 RI pin voltage select
COM3 RI pin voltage select
Audio output select
ATX soft-power switch connector
COM2 RS-232/422/485 select
LCD clock select
LCD driving voltage select
COM2 RS-232/422/485 select
CPU frequency ratio
DOC address select