EKF PC7-FESTIVAL, User Manual

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User Guide • PC7-FESTIVAL • CompactPCI® PlusIO CPU Board
Real-Time Clock
The PC7-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
PC7-FESTIVAL uses a holder to keep a CR2032 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 PC7-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
<
Advanced
6
Advanced Menu
6
ME Configuration
6
ME Unconfig on RTC Clear
6
Disabled
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