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Which ARM assembly instruction is used to enable interrupts?

easy📝 Factual Q12 of 15
ARM Architecture - Exception and Interrupt Model
Which ARM assembly instruction is used to enable interrupts?
ACPSID i
BMOV R0, #1
CNOP
DCPSIE i
Step-by-Step Solution
Solution:

  1. Step 1: Recall interrupt enable instruction

    The instruction to enable interrupts in ARM is CPSIE i.

  2. Step 2: Differentiate from disable instruction

    CPSID i disables interrupts, so it is not the correct answer.

  3. Final Answer:

    CPSIE i -> Option D

  4. Quick Check:

    Enable interrupts = CPSIE i [OK]
Quick Trick: Enable interrupts with CPSIE i, disable with CPSID i [OK]
Common Mistakes:
  • Confusing CPSIE i with CPSID i
  • Choosing unrelated instructions like NOP or MOV
  • Assuming CPSID i enables interrupts

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