If you remove supply voltage and an erase/write operation have already started, then using POF will not help, since the operation has already started. I think POF is really only usable if you have a coin cell battery for instance, and the battery is getting close to the end of life (depleted). However in such case you can also use low power comparator to get the same information.
yep, your right if operation already started POF will not help. Maybe you know, why all the pages of flash are corrupt in this case is it possible to block some pages for erase or etc.?
If flash is corrupted due to power failure, I assume it can be:
- An erase or write operation was occurring when VDD dropped below operating conditions. This would cause an partial erase or write -> undefined result.
- An erase or write operation was occurring when VDD was settling around POF threshold. This could cause erase operation to be skipped, while write operations to succeed on already written words -> old_flash_content_words & new_written_flash_content.
