https://devzone.nordicsemi.com/f/nordic-q-a/48315/flash-retention-at-high-temperaturesWe need to ensure flash retention for &gt;10 years @ 85C on nRF52840. Currently its datasheet says 10y @ 40C, but this seems to claim that 10y @ 85C is more accurate. While that is close to what we need, it seems that in order to be on the safe side we willen-USTelligent Community 13Tue, 11 Jun 2019 11:42:01 GMThttps://devzone.nordicsemi.com/thread/192034?ContentTypeID=1Tue, 11 Jun 2019 11:42:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f6d66f60-c543-45e3-9ce0-f2cdf4b56435Kenneth[quote user=""]- does Nordic have any reference implementation, which would refresh the whole flash safely, or one need to start from scratch? Any pointers?&nbsp;[/quote] <p>&nbsp;No, I guess a DFU would be the closest to look at.&nbsp;</p> [quote user=""]- if chip is&nbsp;powered on most of the time (more like 24/7 or at least 50% of the time), is the retention the same? Or the years specified are for offline storage, but in power-on situation the retention is improved?[/quote] <p>&nbsp;It&#39;s the same.</p><div style="clear:both;"></div>