IBASE Technology MI935 User Manual page 14

INSTALLATIONS
JP7: Clear CMOS Contents
Use JP7, a 3-pin header, to clear the CMOS contents. Note that the
ATX-power connector should be disconnected from the motherboard
before clearing CMOS.
JP7
JP1, JP2, JP3: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
ID394: COM3 and COM4 are fixed for RS-232 use only. The following
table describes the jumper settings for COM2 selection.
COM2
Function
Jumper
Setting
(pin closed)
10 MI935 User's Manual
Setting Function
Pin 1-2
Normal
Short/Closed
Pin 2-3
Clear CMOS
Short/Closed
RS-232 RS-422
JP3: JP3:
1-2 3-4
JP1: JP1:
3-5 & 4-6 1-3 & 2-4
JP2: JP2:
3-5 & 4-6 1-3 & 2-4
RS-485
JP3:
5-6
JP1:
1-3 & 2-4
JP2:
1-3 & 2-4