User Guide • SC5-FESTIVAL • CompactPCI
®
Serial CPU Board
Real-Time Clock
The SC5-FESTIVAL has a time-of-day clock and 100-year calendar, integrated into the CM238 PCH. A
battery on the board keeps the clock current when the computer is turned off. The SC5-FESTIVAL uses
a holder to keep a BR2032 lithium coin cell, giving an autonomy of more than 5 years. Under normal
conditions, replacement should be superfluous during lifetime of the board.
Alternately a BR2032 battery can be soldered in the board when board coating or shock/vibration is
an interest.
In applications were the use of a battery is not permitted, a SuperCap can be soldered instead of the
battery.
It is also possible to use the SC5-FESTIVAL without any battery or SuperCap. In this case the Real-Time
Clock can’t keep its time and date. Per default an error message is reported by the UEFI/BIOS during
boot in all cases, where the Real-Time clock settings are bad:
00C08270: Real Time Clock Error - Check Date and Time settings
00C08251: System CMOS Checksum bad
To suppress this message a setup node exists within the UEFI/BIOS (Build #132 or later):
<
After Power-On press function key <F2> to enter setup menu
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Advanced
6
Advanced Menu
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Miscellaneous Options
6
Ignore Battery Error
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