User’s Manual
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ROBO-503/ROBO-503N User’s Manual
3.5.2 Jumper & Connector List
Connectors on the board are linked to external devices such as hard disk drives, keyboard,
mouse, 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.
Jumpers
Label
Function
Note
J1
Clear CMOS / LCD clock signal select
3 x 2 header, pitch 2.0mm
J2
LCD driving & backlight voltage select
3 x 2 header, pitch 2.0mm
J3, J4
COM2 RS-232/422/485 select
3 x 2 header, pitch 2.0mm
4 x 3 header, pitch 2.0mm
(J4)