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AIMB-580 User Manual 8
1.8 Jumper Settings
This section provides instructions on how to configure your motherboard by setting
the jumpers. It also includes the motherboards's default settings and your options for
each jumper.
1.8.1 How to set jumpers
You can configure your motherboard to match the needs of your application by set-
ting the jumpers. A jumper is a metal bridge that closes an electrical circuit. It consists
of two metal pins and a small metal clip (often protected by a plastic cover) that slides
over the pins to connect them. To “close” (or turn ON) a jumper, you connect the pins
with the clip. To “open” (or turn OFF) a jumper, you remove the clip. Sometimes a
jumper consists of a set of three pins, labeled 1, 2, and 3. In this case you connect
either pins 1 and 2, or 2 and 3. A pair of needle-nose pliers may be useful when set-
ting jumpers.
1.8.2 CMOS clear (CMOS1)
The AIMB-580 motherboard contains a jumper that can erase CMOS data and reset
the system BIOS information. Normally this jumper should be set with pins 1-2
closed. If you want to reset the CMOS data, set J1 to 2-3 closed for just a few sec-
onds, and then move the jumper back to 1-2 closed. This procedure will reset the
CMOS to its default setting.
*Keep CMOS data
1-2 closed
Clear CMOS data
2-3 closed
*default setting
1.8.3 Chassis instruction connector (JCASE1)
The AIMB-580 motherboard contains a jumper that offer a chassis open sensor. The
buzzer on the motherboad beeps when the case is opened.
1.8.4 ATX/AT mode selector (PSON1)
AT mode 1-2 closed
*ATX mode 2-3 closed
*default setting
Table 1.3: CMOS1
Function Jumper Setting
Table 1.4: ATX/AT mode selector (PSON1)
Function Jumper Setting
1
1