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How can you configure the MPU to protect a memory region from both read and write access?

hard📝 Application Q8 of 15
ARM Architecture - Bus Architecture
How can you configure the MPU to protect a memory region from both read and write access?
ASet the region as no-access in MPU settings
BEnable read-only access in MPU
CDisable the MPU for that region
DSet the region as executable only
Step-by-Step Solution
Solution:

  1. Step 1: Understand MPU access permissions

    MPU allows setting regions as no-access, read-only, or read-write.

  2. Step 2: Protect from both read and write

    To block both read and write, set the region as no-access.

  3. Final Answer:

    Set the region as no-access in MPU settings -> Option A

  4. Quick Check:

    No-access = No read or write allowed [OK]
Quick Trick: No-access blocks both read and write [OK]
Common Mistakes:
  • Choosing read-only (allows read)
  • Disabling MPU (no protection)
  • Setting executable only (does not block read/write)

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