This would be dealt in hardware from the very beginning, restricting access to those pages for debugger as well, or even forever (Key index 7), right ?
13.5.2. OTP Access Keys
Page 61 contains 128-bit keys. Each key has a valid bit: when set, the key becomes completely inaccessible to
software. The keys are always read out into hidden registers by hardware during startup so that hardware can perform
key comparisons without exposing the keys to software.
Pages can require specific keys for some page permissions. To unlock the page, the user writes their key to a write-only
register in the OTP block. The page remains unlocked for as long as the correct key is present in this register. To re-lock
the page, erase the active key by writing zeroes to the key register.
Statistics: Posted by gmx — Wed Apr 30, 2025 9:08 pm