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STM32F303 RTC Fail-safe mode?

I am using STM32F303 MCU for the customized board and using External RTC. Can we Build any Fail-safe mode for RTC in case of external RTC failsAnd if we flash or Reprogram the MCU. Will RTC Time sets to "0" zero Automatically?

SKris.7 by Associate
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MCP23S17 ?

Hello everyone, I have a question ,is there a library for mcp23s17 extander on the stm32f407 ?

bnymntrz by Associate III
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Resolved! How to use BDMA in STM32H7?

I am trying to read signals from digital MEMS microphones via DFSDM peripheral and transfer it to memory with DMA on STM32H7A3. I found out that 4 channels are handled by DMA and remaining 4 with BDMA. Now I can't figure out how to get this BDMA to ...

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