18
Jumpers
The mainboard provides jumpers for setting some mainboard functions.
This section will explain how to change the settings of the mainboard
functions using the jumpers.
Clear CMOS Connector: CLEAR_CMOS
The onboard CMOS RAM stores system configuration data and has an
onboard battery power supply. To reset the CMOS settings, set the
jumper on pins 1 and 2 while the system is off. Return the jumper to
pins 2 and 3 afterwards. Setting the jumper while the system is on will
damage the mainboard.
Setting 1 2 3
Normal Operation ON ON OFF
Clear CMOS setting OFF ON ON
Warning:
Except when clearing the RTC RAM, never remove the cap on
CLEAR_CMOS jumper default position. Removing the cap will cause
system boot failure. Avoid clearing the CMOS while the system is on; it
will damage the mainboard.
Master/Slave Setting for CF Connector: MS_CF_SEL
This jumper determines the working state of the CF connector. The
default value is Master.
Setting 1 2 3
Slave ON ON OFF
Master OFF ON ON
Voltage Selector for CF Connector: V_CF_SEL
This VCC selector jumper is to determine the input voltage of the CF
connector. The default value is +3.3V.
Setting 1 2 3
+3.3V ON ON OFF
+5V OFF ON ON
