Kontron COMe Eval Carrier T2 - Manual (Page 29)

COM Express® Eval Carrier Type 2
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5.13 External BIOS
The COM Express® Eval Type 2 supports external boot. By closing Jumper J27 the module's onboard BIOS is
disabled and the system will boot from an external Firmware Hub in U21 PLCC socket.
For modules supporting SPI boot the COM Express® Eval Type 2 provides a SPI socket U22 for an optional
available SPI Flash. SPI is part of COM.0 Specification Rev 2.0 and external SPI boot can be enabled by closing
Jumper J27. Please check the documentation of your module if SPI is supported and which SPI Flash size is
required.
Booting from external BIOS:
»
Close Jumper J27 to boot from the baseboard's SPI Flash
Flashing the external BIOS:
»
Prepare a bootable USB flash drive and save BIOS and flash utility in the root folder
Please check Application Note KEMAP046 avialble at Kontron's customer section for more details
»
Open J27 to boot from the module's BIOS
»
Power on the system and boot from our USB flash drive
»
Close J46 to enable the LPC FWH or close J75 to enable the SPI Flash
»
Execute the BIOS update command (e.g. afudos.exe bios.rom /P /B /N /C /X)
»
Reboot your system if flash procedure has finished
»
Your system should now start from external BIOS
Note: Please check module documentation if external boot from LPC FWH and/or SPI Flash is supported
Warning: Do not close both jumpers at the same time