STM32L152 - random EEPROM deletion at low voltage?

[JJRR]

Dear,

we use EEPROM in our project with STM32L152. It seems like in some MCUs is erased random part of the Eeprom. It happens very rarely, and probably most likely when VCC is disconnected from PCB (MCU).

Any solution, any similar experience?

Best regards, Jan.

[waclawek.jan]

No specific experience, so only general questions:

Does your program write into EEPROM or FLASH? If so, do you lock the EEPROM immediately after writing?

Do you have BOR enabled? What level? Can you make it more stringent?

JW

[JJRR]

Thanks! I repaired it now. Because sometimes I did not make a lock immediately after writing - I need to make a new stress to test it and I will see :)

[ABans.3]

We are facing the similar issue with the stm32 L073. On reset of the stm32, our eeprom has been turned to 0. Also BOR is not set in our firmware.