Hi team,
I need your help for the below case.
Application: e-metering.
After working some time in an aging room where we maintain temperature (still within operating range) and switch on/off voltage current, all the flash sections (excluding the info memory) goes 0xFF.
There were 2 cases out of 3000 pcs. I tried to re-program one of them, then it works well until now. The other one I just leave it there for the check up if any.
I checked the VDD, the RST signals. They are both okay.
What are the possible causes? Should I start requesting the FA?