Manufacturer Mode Jumper (J-Mfg); Rtc Reset (J-Rtc) - EKF SC2-PRESTO CompactPCI User Manual

User Guide • SC2-PRESTO • CompactPCI

Manufacturer Mode Jumper (J-MFG)

The jumper J-MFG is used to bring the board into the manufacturer mode. This is necessary only on
board production time and should not used by customers. For normal operation the jumper should
be removed. The pin header J-MFG is not stuffed on the SC2-PRESTO by default.

RTC Reset (J-RTC)

The jumper J-RTC may be used to reset certain register bits of the battery backed RTC core within the
PCH QM87. 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 J-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 J-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 J-RTC is not stuffed on the
SC2-PRESTO by default.
© EKF
®
1
J-MFG
1)
Jumper Removed Normal operation
Jumper Installed Entering Manufacturer Mode
1)
This setting is the factory default
1
J-RTC
1)
Jumper Removed Normal operation
Jumper Installed RTC reset performed
1)
This setting is the factory default.
Serial CPU Board • Intel® Core
J-MFG
Function
J-RTC
Function
-59-
TM
4xxx Processor
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