[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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