STM32F411 "User specific sector"

[tranaptic]

I'm developing a tool to gang program STM32 products. I'm currently working on the STM32F411 (reference manual RM0383) and the FLASH_CR register SNB field mentions two sectors: user specific sector and user configuration sector. The user configuration sector is documented later in the manual but the user specific sector is only mentioned twice and not elaborated on. At a guess, I'd say its for the OTP region, but OTP can't be erased so its unclear. I've checked other RMs and some mention the user specific sector but don't elaborate on it either. Can anyone tell me what the "user specific sector" is and what I'm erasing if I set SNB to 0b1100 for an erase operation?

Thanks,

Keith

[STOne-32 · Accepted solution]

Dear @tranaptic ,

Welcome in STCommunity and thanks a lot for your contribution and your project of Flash gang programmer . It seems a documentation issue and these bits should be like others STM32F4 series . “ not allowed” 

https://www.st.com/resource/en/reference_manual/rm0090-stm32f405415-stm32f407417-stm32f427437-and-stm32f429439-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

Page 107 . For F411 should stop at sector7 . We will escalated internally for fixing .

Thanks a lot again,

STOne-32

[STOne-32]

Dear @tranaptic ,

Follow-up internal Ticket number entered as the following: 206513.

Have a great day,

STOne-32.