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What is the best way to backup some bytes whitout RTC backup registers in order to enter in shutdown mode.

ACHAB.1
Associate

Hello, I use STM32L476 for very low power project. I also use an external RTC because it is temperature-compensated. My question is : What is the best way to backup some bytes whitout RTC backup registers in order to enter in shutdown mode.

I had the idea to use internal flash memory but I need to backup some dozen of bytes. I need to do the same task about ten times before read all of these bytes and delete them. Because of erasing before writing, I consider that flash isn't the best way.

If anyone can help me, I'll be awsome.

Thanks in advance

Chabot Axel

1 REPLY 1
Uwe Bonnes
Principal II

There are a lot of ap notes and threads about using flash as EEPROM.