[sdiy] a provoking question about time

sleepy_dog at gmx.de sleepy_dog at gmx.de
Fri Jun 24 13:18:09 CEST 2022

rburnett at richieburnett.co.uk:
> parts.  My understanding is that re-writing pages of Flash to store
> user parameters also shortens the longevity.  Some other
> microcontrollers I'm using now quote longevity for <1000 E/W cycles
> and another smaller figure for >1000 E/W cycles! (That's one good
> reason not to sell development prototypes.)

Apparently also operating temperature.
 From an ST document "en.STM32G4-Memory-Flash_FLASH.pdf", there it says:

Data retention:

30 years after 10k cycles @ 55°C
15 years after 10k cycles @ 85°C
10 years after 10k cycles @ 105°C

30 years after 1k cycles @ 85°C
15 years after 1k cycles @ 105°C
7 years after 1k cycles @ 125°C

They call this "design expectation". I guess it's hard to artificially
speed this up for testing it accurately.

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