Recovering from Secure Boot on S32K3

end48 — Wed, 26 Jun 2024 17:37:23 GMT

Hello,

I'm currently implementing secure boot on a S32K310. I've got two questions:

In case I configure secure boot on an SMR, how can I recover if the code in this SMR becomes corrupted? Do I need to flash with a debug probe the non corrupted firmware again? Is there another way?
In case I need to modify the code in the SMR after activating the secure boot (during development typically), can I disable secure boot before updating the code and reconfigure secure boot on the new code?

Thanks,

Benoit

Re: Recovering from Secure Boot on S32K3

davidtosenovjan — Tue, 02 Jul 2024 12:32:55 GMT

1) You will have to update SMR if possible.

2) Once the secure boot is enabled, it can't be disabled.