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If an ARM device is in deep sleep mode and a wake-up source triggers, what is the expected behavior?

medium📝 Analysis Q5 of 15
ARM Architecture - Power Modes
If an ARM device is in deep sleep mode and a wake-up source triggers, what is the expected behavior?
AThe device shuts down permanently
BThe device performs a full reboot
CThe device ignores the wake-up source
DThe device resumes normal operation from where it left off
Step-by-Step Solution
Solution:

  1. Step 1: Understand deep sleep mode behavior

    In deep sleep, the device saves state and waits for wake-up sources to resume operation.

  2. Step 2: Identify wake-up effect

    When a wake-up source triggers, the device resumes from saved state, not rebooting.

  3. Final Answer:

    The device resumes normal operation from where it left off -> Option D

  4. Quick Check:

    Deep sleep wake-up = Resume operation [OK]
Quick Trick: Wake-up resumes, does not reboot [OK]
Common Mistakes:
  • Confusing wake-up with reboot
  • Assuming wake-up is ignored in deep sleep
  • Thinking device shuts down permanently

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