My customer is running into a strange boot behavior on their custom SC589 board, about 50% of their custom boards occasionally cannot bootup the SC589.
The board is designed such that an external MCU will toggle the SYS_HST on the SC589 LOW for 5ms and release it back HIGH, allowing the SC589 to load the code from on board QSPI flash. Most of the time uBoot will show up on the console immediately, but about 20% of the time the console is blank. Power rails are fine when this happens, and can not define at which boot stage the SC589 is halted.
Any known issues regarding the boot problem? Or is there any method to debug the boot ROM in the SC589 to see where the problem is.