Associate

Question

Is dual bank flash configuration available for STM32H743xxxx?

Forum|Forum|6 years ago
June 22, 2020
4 replies
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In STM32F7 dual/single bank configuration is available. It can be done using nDBANK bit of FLASH_OPTCR register.

Ref link: https://www.st.com/resource/en/application_note/dm00266999-stm32f7-series-flash-memory-dual-bank-mode-stmicroelectronics.pdf

For STM32H7, FLASH_OPTCR register is not having nDBANK bit. So, is there any way to use flash with single bank mode for STM32H7?

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No, the STM32H7 is always in dual bank mode. But this is just an organizational thing. It shouldn't prevent you from using the flash however you want.

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Associate

@TDK Thanks for the reply, but will it allow to create (and execute) a single binary having size > 1MB?

Yes. It's still contiguous memory. No issue with that. Just define it as a single section in your linker file with capacity 2MB.

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Principal

For the sake of completeness,

STM32H743xI has 2 banks of 1 MByte each forming a contiguous flash memory area, so there would be no issues with a single binary spanning both banks.

STM32H743xG has 2 banks of 512 kByte each mapped to non-contiguous addresses, there is a 512 kByte hole between the two banks.