Chapter 2
24
J
UMPERS
The mainboard provides jumpers for setting the mainboard’s functions. This
section will explain how to change settings for your mainboard’s functions
through the use of the jumpers.
Clear CMOS: CLEAR_CMOS
The onboard CMOS RAM stores system configuration data and has an
onboard battery power supply. The long-life battery has a lifetime of at least
5 years. If you want to clear the system configuration data from the CMOS
RAM, use the CLEAR_CMOS (Clear CMOS jumper). You can clear the CMOS by
shorting 1-2 pin while the system is off. Then return it to the 2-3 pin position.
Shorting the jumper while the system is on will damage the mainboard.
Setting
1
2
3
Clear
ON
ON
OFF
Keep
OFF
ON
ON
COM3/COM4 Voltage Selector: J3, J4
Some devices require a different voltage than the default voltage on the
board. J3 and J4 enable you to choose between 5V and 12V on COM3 and
COM4 respectively. Since pin 9 on COM3/COM4 is reserved for switching
between 5V and 12V, COM3/COM4 can not carry an RI signal. The following
settings apply to both J3 and J4.
Setting
1
2
3
5V
ON
ON
OFF
12V
OFF
ON
ON
Summary of Contents for EPIA-PD Mini-ITX
Page 1: ...User s Manual EPIA PD Mini ITX Mainboard P N 99 51 012811 11 Version 1 21 September 25 2008...
Page 8: ...iv This page is intentionally left blank...
Page 12: ...Chapter 1 4 MAINBOARD LAYOUT Back Panel...
Page 34: ......
Page 35: ...27 CHAPTER 3 BIOS Setup This chapter gives a detailed explanation of each BIOS setup functions...
