We disigned a customer board based on sabreauto_6q board. now, it can boot up normally in eMMC boot mode. it means that download and boot up are ok.
However, the eMMC used is moved from the freescale reference board we brought. if we use the eMMC brought by ourselves (not moved from reference board), download with MFG is ok. but cannot enter into boot up mode after finished download.
we have do many experiments, only if using the eMMC moved from freescale reference board is ok ( both download and boot up are ok).
It is so strange. does anyboard subject such issue?