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1.8
Jumper Settings
This section provides instructions on how to configure your motherboard by setting
the jumpers. It also includes the motherboard'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
BIOS CMOS (JCMOS1)
PCA-6763 CPU card contains a jumper that can erase BIOS CMOS data and reset
the system BIOS information. Normally this jumper should be set with pins 1-2
closed. If you want to reset those data, set JCMOS1 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 last status or default setting.
Please note that both date and time information will be reset after short pin 2-3.
Table 1.3: Clear BIOS CMOS (JCMOS1)
Function
*Keep BIOS CMOS data
Clear BIOS CMOS data
* Default setting
1.8.3
AT/ATX mode HW selection (ATXF1)
The PCA-6763 can support an advanced soft power switch function. When using an
ATX power supply, please follow the instructions below to enable ATX functions.
1.
Find ATX feature cable (1700002343).
2.
Connect the 3-pin plug of the cable to ATXF1 (ATX feature connector). And con-
nect another plug to backplane HCN1 connector.
3.
Connect the power on/off button cable of the chassis to pin 9 and pin 10 of
JFP1. Default value is set ATXF1 to short pin1-2 to support AT power.
Table 1.4: AT/ATX Mode HW Selection (ATXF1)
Function
*AT mode
ATX mode
* Default setting
PCA-6763 User Manual
Jumper Setting
1
2
3
1-2 closed
1
2
3
2-3 closed
Jumper Setting
1-2 closed
1
2
3
Connecting to backplane with
cable: 1700002343
8
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