Question about the speculative accesses

[Tahm_A]

Following this post describing how to disable speculative accesses on external memories range (0x6000 0000 to 0xDFFF FFFF) on Cortex®-M7 processors, I'm wondering if such mechanism should be done to:

- memory regions marked as reserved:

Source 

- DTCM / ITCM memory regions not mapped:

ITCM_AXI_SHARED[1:0] and DTCM_AXI_SHARED[1:0] can be used to change the memory allocation.

[mƎALLEm · Accepted solution]

Hello,

You need to disable the speculative access especially for the address ranges related to the unused/non initialized external memories.

The MPU background settings provided in this post does the job. 

The bottle neck are the external memories. You can also read this post.