Assumed there is no eMMC available on BBB, would it boot from SD-card automatically as first boot device?
Assumed there is no eMMC available on BBB, would it boot from SD-card
automatically as first boot device?
yes
From my understanding this is what BeagleBone White does - but are there any
more differences than just the eMMC to let it boot in an other order?
page 6 of 11, sysboot pins 4:0 control the peripheral boot sequence from rom.
Regards,
Yes it would. This is all documented in the SRM.
http://www.elinux.org/Beagleboard:BeagleBoneBlack#LATEST_PRODUCTION_FILES_.28C.29
Gerald