User Guide • PC3-ALLEGRO • CompactPCI
®
PlusIO CPU Board • Intel® i7-3xxx Processor
Real-Time Clock
The PC3-ALLEGRO has a time-of-day clock and 100-year calendar, integrated into the QM77 PCH. A
battery on the board keeps the clock current when the computer is turned off. The PC3 uses a BR2032
lithium battery soldered in the board, giving an autonomy of more than 5 years. Under normal
conditions, replacement should be superfluous during lifetime of the board.
In applications were the use of a battery is not permitted, a SuperCap can be stuffed instead of the
battery.
SPI Flash
The BIOS and iAMT firmware is stored in flash devices with Serial Peripheral Interface (SPI). Up to
16MByte of BIOS code, firmware and user data may be stored nonvolatile in these SPI Flashes.
The SPI Flash contents can be updated by a DOS or Linux based tool. This program and the latest
PC3-ALLEGRO BIOS binary are available from the EKF website. Read carefully the enclosed instructions.
If the programming procedure fails e.g. caused by a power interruption, the PC3-ALLEGRO may no
more be operable. In this case you would possibly have to send in the board, because the Flash
device is directly soldered to the PCB and cannot be changed by the user.
© EKF -27- ekf.com
