RRAM retention years?

[cd_samsara]

This table for the absolute maximum ratings isn't clear.

Can you help confirm the unit "y" here for RRAM retention? Is this years? Is it cumulatively years or consecutive?

[Turbo J]

Unit is years.

Not sure what you mean with cumulative or consecutive - its wall clock time. 10 years if the device never gets hotter than 85°C, 2 years if it ever gotten hotter than 85 but not higher than 105°C.Note that these are probably chip internal temps and not outside case temps (but I could be wrong here, not a nordic employee), but that matters little for a low power chip.

[Ressa]

Hi,

"y" refers to years. It refers to number of years that the data can be reliably retained without power at the mentioned temperature.

Best regards,
Ressa

[Emil Lenngren]

I think the question is, if you reprogram the RRAM at some point, will the retention cycle restart from zero again.

[Ressa]

Yes it will restart from recent write.