Cortex M7 MPU to prevent speculative access

[Lisha_Sweetha]

Why we Enable the Speculation default mode for MPU? Is there any reason to enable it? 

[SofLit · Accepted solution]

Hello @Lisha_Sweetha and welcome to the community,

Please read these threads:

https://community.st.com/t5/stm32-mcus-embedded-software/information-about-mpu-settings-for-the-stm32h743/td-p/83830

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculative-access-and-stm32h7-memory-protection-unit/td-p/119039

https://community.st.com/t5/stm32-mcus-products/speculation-on-stm32f767/td-p/728366

From ARM: https://developer.arm.com/documentation/ddi0489/f/memory-system/speculative-accesses

Hope it helps.