STM32H523RCT6 goes into HARDFAULT handler/NMI handler

[DeepakKumar]

Hello ST Team,

                             Currently i am using STM32H523RCT6 mcu for one of my application. Some times mcu goes into "hardfault handler/nmi handler". Can you suggest what will be reasons behind that problem.

Thanks with Regards

DEEPAK

[SofLit]

Hello,

Your description does not provide sufficient information. Moreover Hardfault, it's not obvious to tell you the origin of it so need to debug it yourself. 

See this article: https://community.st.com/t5/stm32-mcus/how-to-debug-a-hardfault-on-an-arm-cortex-m-stm32/ta-p/672235

The only origin that I can tell you about this Hardfault on H5 product is the following: https://community.st.com/t5/stm32-mcus/how-to-avoid-a-hardfault-when-icache-is-enabled-on-the-stm32h5/ta-p/630085

It could be something related to ECC error see: https://community.st.com/t5/stm32-mcus-products/stm32h5-ecc-errors-and-icache-invalidation/td-p/683375