Specifications

Jumpers and Connectors 35

cPCI-6840

JP3: Clear CMOS

The CMOS RAM stores the real time clock (RTC) information,

BIOS configuration, and default BIOS setting. The CMOS is

off.

Please follow the following steps to erase the CMOS RAM

data:

1. Unplug the SBC from system

2. Short pins 2 and 3 of JP3, then reinstall the jumper to

normal location

3. Insert the SBC back to the chassis.

Miniature Switch on the Front Panel Lower Ejector:

The miniature switch is designed for power control and

hot-swap control. When the cPCI-6840 is plugged into system

slot, the whole system will not be powered up until the lower

ejector is closed. It will issue a power button signal when users

open the lower ejector. When the cPCI-6840 is plugged into a

peripheral slot, the entire system will not be powered up until

the lower ejector is closed and it will send out an ENUM# signal

to the system to indicate that a board has been plugged into

the CompactPCI backplane. When the lower ejector is opened,

the cPCI-6840 will send out an ENUM# to the system and wait

for the command from system.

Status JP3

Normal operation (Default)

Clear CMOS

Table 2-4: JP3 Settings

1 2 3

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