I was working on secure boot function recently. I run my device in "Sequential Boot Mode", but I find this mode is not what I need. Because, whether the boot check is fail or not, it will run Flash code. I think if the boot check is fail, it should stop or reset.
So, I try "Strict Sequential Boot Mode". But I didn't read AN5401.pdf carefully. I burned my code to flash, Then I configured CSEc, and I configured "Strict Sequential Boot Mode" with "automatic BOOT_MAC calculation".
Now, my device can not be startup, it is always stay in RESET state. The RESET pin is always low.
How Can I reuse my device?
Thanks a lot!