8.12.6.5.2 BUREG256b Erase Sequence

In parallel to the BUSRAM4KB Erase, the BUREG256b register bank is erased immediately.

BUREG256b is erased only if its contents have been modified since the last erase, or if it is the first erase request since the backup reset was released. Even if the physical erase of the memory is not done due to an empty memory, the intrusion flags are stored in the status register.

BUREG256b is always reset after a VBAT power-up.

These registers are seen as zero after reset or after an erase.