Writing a NULL byte into the STM32L15xC6T6 Data EEPROM. Data sheet says it is not allowed. In practice, in some devices work in others resets the processor. Please clarify

[AMott.1]

I have some projects that were left inadvertently with some function calls that write 0x00 bytes into the data EEPROM. They work properly. I have tested it.

I detected the problem on a prototype board with an old sample of STM32L152C6T6 and this made me realize the mistake.

[AMott.1]

OK. Thanks a lot

[KDJEM.1 · Accepted solution]

Hi @Community member​ ,

Thank you  for bringing this issue to our attention.

For Cat.1 (no suffix) devices, the Byte write can be used only to write a NON NULL byte.

In contrast to Cat.1 devices, in Cat.2 (suffix A) devices the Byte write can be used to write a NULL byte.

This difference between the two categories will be added in the new TN1176 update.

Kaouthar

[waclawek.jan]

Thanks, Kaouthar.

JW​