User Guide CCM-BOOGIE • High Performance Core
TM
2 Duo 3U
CompactPCI
®
CPU Board
© EKF -59- ekf.com
Configuration Jumpers
Reset Jumper BIOS CMOS RAM Values (P_GP)
The jumper P_GP is used to bring the contents of the battery backed CMOS RAM to a default state.
The BIOS uses the CMOS to store configuration values, e.g. the actual boot devices. Using this jumper
is only necessary, if it is not possible to enter the setup of the BIOS. To reset the CMOS RAM mount
a jumper on P_GP and perform a system reset. As long as the jumper is stuffed the BIOS will use the
default CMOS values after any system reset. To get normal operation again, the jumper has to be
removed.
P_GP
Function
Jumper OFF
1)
No CMOS reset performed
Jumper ON
CMOS reset performed
1)
This setting is the factory default.
Reset Jumper ICH9 RTC Core (P_RTC)
The jumper P_RTC is used to reset the battery backed core of the ICH9. This effects some registers
within the ICH9 RTC core that are important before the CPU starts its work after a system reset. Note
that P_RTC will neither perform the clearing of the CMOS RAM values nor resets the real time clock.
To reset the RTC core the board must be removed from the system rack. Short-circuit the pins of
P_RTC for about 1 sec. After that reinstall the board to the system and switch on the power. It is
important to accomplish the RTC reset while the board has no power.
P_RTC
Function
Jumper OFF
1)
No RTC reset performed
Jumper ON
RTC reset performed
1)
This setting is the factory default.
P_GP
1=GPI 2=GND
1
P_RTC
1=RTCRST# 2=GND
1
