User Guide • SC1-ALLEGRO •
CompactPCI
®
Serial
CPU Board • Intel® i7-3xxx Processor
RTC Reset (P-RTC)
The jumper P-RTC may be used to reset certain register bits of the battery backed RTC core within the
PCH QM77. This can be necessary under rare conditions (e.g. battery undervoltage), if the CPU fails to
enter the BIOS POST after power on. Note that installing of jumper P-RTC will neither set UEFI BIOS
Setup to EKF Factory Defaults nor resets the time and date register values of the RTC (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. Thereafter 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. The pin header P-RTC is not
stuffed on the SC1-ALLEGRO by default.
P-RTC
Function
Jumper Removed
1)
Normal operation
Jumper Installed
RTC reset performed
1)
This setting is the factory default.
1
P-RTC
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Summary of Contents for SC1-ALLEGRO
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