ARM Architecture - Bus Architecture
Which ARM assembly instruction sequence correctly enables the Memory Protection Unit (MPU)?
Which ARM assembly instruction sequence correctly enables the Memory Protection Unit (MPU)?
easy📝 Factual Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify MPU control register address
MPU_CTRL is typically at 0xE000ED94.Step 2: Enable MPU by writing 1
Writing 1 to MPU_CTRL enables the MPU.Step 3: Match instruction sequence
LDR R0, =0xE000ED94; MOV R1, #1; STR R1, [R0] loads MPU_CTRL address, moves 1 into R1, and stores R1 to MPU_CTRL.Final Answer:
LDR R0, =0xE000ED94; MOV R1, #1; STR R1, [R0] -> Option BQuick Check:
Enable MPU by writing 1 to MPU_CTRL [OK]
Quick Trick: Enable MPU by writing 1 to MPU_CTRL register [OK]
Common Mistakes:
- Using wrong MPU control register address
- Writing 0 instead of 1 to enable MPU
- Confusing register names or values
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