60.6.6.2 Backup Mode

When running in Backup mode, only the backup power domain is monitored by the SECUMOD.

When detecting an error, the Protection Manager sends a clear signal to the automaton, which starts the secure memories Erase sequence if the memory is not empty.

The user can generate a wake-up signal (SWKUP) to the Shutdown Controller instead of clearing the secure memories content immediately. This choice is defined by writing in SECUMOD_BMPR or in SECUMOD_WKPR.

Refer to the Shutdown Mode register (SHDWC_MR) in the section “Shutdown Controller (SHDWC)” for details on wake-up event management.

Note that the SECUMOD Backup mode differs from the Shutdown Controller Backup mode in that the Shutdown Controller Backup mode is only related to the VDDCORE supply presence, while the SECUMOD Backup mode is not.