[Solved] An embedded system uses MPU to protect three memory regions: code, data, and peripherals.... Which of the following statements is true about this configuration? | ARM Architecture

ARM Architecture - Bus Architecture

An embedded system uses MPU to protect three memory regions: code, data, and peripherals. The code region is set as read-only, data as read-write, and peripherals as no-execute. Which of the following statements is true about this configuration?

AThe MPU prevents code from being modified and peripherals from running code

BThe MPU allows peripherals to execute code but prevents data writes

CThe MPU disables all access to the data region

DThe MPU allows code to be written but not executed

Step-by-Step Solution

Solution:

Step 1: Analyze code region protection
Setting code region as read-only prevents modification, ensuring code integrity.
Step 2: Analyze peripherals region protection
Setting peripherals as no-execute stops code execution from peripheral memory, enhancing security.
Step 3: Confirm data region access
Data region set as read-write allows normal data operations.
Final Answer:
The MPU prevents code from being modified and peripherals from running code -> Option A
Quick Check:
Read-only code + no-exec peripherals = protection [OK]

Quick Trick: Read-only code and no-exec peripherals protect system [OK]

Common Mistakes:

Thinking peripherals can execute code
Assuming data region is blocked
Believing code region is writable

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More ARM Architecture Quizzes

Which of the following statements is true about this configuration?

Step 1: Analyze code region protection

Step 2: Analyze peripherals region protection

Step 3: Confirm data region access

Final Answer:

Quick Check:

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