User manual

V270 Motherboard User Manual
10
2.4.1 JP1: Clear CMOS
User must make sure the power supply to turn off the power supply before
setting Clear CMOS. Users remember to setting jumper back to Normal before
turning on the power supply.
Default: 2 short 3.
2.4.2 JP2: LVDS / DVI Selector
The jumper can select CN4 connector providing LVDS or DVI signal.
Default: 1 short 2.
2.4.3 J2: RS232 / RS422 / RS485 Selector
The jumper can be configured to operate COM1 in RS-232/422/485 mode. And
the setting must be cooperated with J3 settings.
2.4.4 J3: COM1 RS232 / RS422 / RS485 Function Selector
The jumper can be configured to operate COM1 in RS-232/422/485 mode. And
the setting must be cooperated with the 2.4.3 settings.
Default 1 short 2.
Pin No. Functions
1 Short 2 Clear CMOS
2 Short 3 Normal
Pin No. Functions
1 Short 2 LVDS
2 Short 3 DVI
RS232 RS422/485
1-2 2-3
4-5 5-6
7-8 8-9
10-11 11-12
Pin No. Functions
1 Short 2 RS232
3 Short 4 RS422
5 Short 6 RS485
1
2
3
Clear CMOS
1
2
3
Normal
RS232
1
3
5
2
4
6
RS422
1
3
5
2
4
6
RS485
1
3
5
2
4
6
1
2
3
LVDS
1
2
3
DVI
RS232
1
4
7
10
3
6
9
12
RS422/485
1
4
7
10
3
6
9
12