NVMC power failure protection is possible through the use of a power-fail comparator that is monitoring power supply.
If the power-fail comparator is enabled, and the power supply voltage is below VPOF threshold, the power-fail comparator will prevent the NVMC from performing erase or write operations in non-volatile memory (NVM).
If a power failure warning is present at the start of an NVM write or erase operation, the NVMC will block the operation and a bus error will be signalled. If a power failure warning occurs during an ongoing NVM write operation, the NVMC will try to finish the operation. And if the power failure warning persists, consecutive NVM write operations will be blocked by the NVMC, and a bus error will be signalled.