Generic option bytes on STM32F4

Question

I'm currently tuning some code written for an STM32F070, where we use one byte on user option byte to keep some flags between Resets, using:

FLASH_ProgramOptionByteData(ADRESSE_OPTION_BYTE_DATA0, status_to_store);

Reading carefully the datasheet from our new STM32F446 lets me think that it is no longer possible to use option bytes to store one user byte...

1 - Am I Right with this assertion ? If not, what did I miss ?

2 - Is there some workaround, not involving to rewrite a sector of the flash ?

Answer 1

I am not an expert on stm32, rather still a beginner, but maybe you could have a look on the RTC backup register to hold your data ?