SPRZ536B September 2022 – July 2024 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
Boot: ROM timeout for MMCSD filesystem boot too long
Due to a bug in ROM if attempting to boot in SD/MMC boot (filesystem mode) from an eMMC device that is empty or erased (or factory fresh) the normal boot timeout to switch to backup boot mode will not occur as the boot gets stuck in an infinite loop until the watchdog timer reset kick in.
Need to boot from another primary boot mode to program the eMMC flash.