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Which syntax correctly describes enabling a wake-up source in ARM system registers?

easy📝 Factual Q3 of 15
ARM Architecture - Power Modes
Which syntax correctly describes enabling a wake-up source in ARM system registers?
ASet the corresponding bit in the wake-up enable register
BClear the bit in the power-down register
CWrite zero to the interrupt mask register
DDisable the clock to the wake-up source
Step-by-Step Solution
Solution:

  1. Step 1: Understand register control for wake-up sources

    Wake-up sources are enabled by setting bits in specific control registers.

  2. Step 2: Match the correct register operation

    Setting the bit in the wake-up enable register activates the wake-up source.

  3. Final Answer:

    Set the corresponding bit in the wake-up enable register -> Option A

  4. Quick Check:

    Enable wake-up = Set bit in enable register [OK]
Quick Trick: Enable wake-up by setting bits, not clearing [OK]
Common Mistakes:
  • Clearing bits instead of setting
  • Confusing interrupt mask with wake-up enable
  • Disabling clocks instead of enabling sources

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