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STM32F105: information about FLASH read protection seems to be wrong in flash memory documentation

occam25
Associate II

Hi,

in https://www.st.com/resource/en/programming_manual/cd00283419-stm32f10xxx-flash-memory-microcontrollers-stmicroelectronics.pdf section 2.4.1 it says that, for connectivity line devices (like the STM32F105RC I'm using), pages 0-1 are automatically write-protected when the read protection is enabled.

Since I enable the read protection during initialization, I have tried to use page 3 to store some configuration parameters, but I've found out that this page is also write protected when I enable the read protection, although the documentation says that the automatic write protection is set for pages 0 and 1. As a result, I get an error when I try to erase that page. Is this an errata in the documentation?

Are the first four pages write protected in connectivity line devices like they are in low and medium-density devices?

Thanks

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