User Guide • SC4-CONCERTO • CompactPCI
®
Serial CPU Board
Real-Time Clock
The SC4-CONCERTO 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 SC4-CONCERTO
uses a holder to keep a BCR2032 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 CR2032 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 SC4-CONCERTO 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
▸
Advanced
→
Advanced Menu
→
Miscellaneous Options
→
Ignore Battery Error
▸
Advanced
→
Advanced Menu
→
Management Engine Configuration
→
ME Unconfig on RTC Clear
→
Disabled
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