ARM Architecture - Power Modes
Why does ARM architecture require setting the SLEEPDEEP bit before entering deep sleep mode?
Why does ARM architecture require setting the SLEEPDEEP bit before entering deep sleep mode?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand purpose of SLEEPDEEP bit
The SLEEPDEEP bit tells the CPU to enter a deeper power-saving mode than normal sleep.Step 2: Explain why this distinction is needed
Without setting this bit, the CPU only enters normal sleep, which saves less power.Final Answer:
To distinguish deep sleep from normal sleep and enable deeper power saving -> Option BQuick Check:
SLEEPDEEP enables deep sleep mode = B [OK]
Quick Trick: SLEEPDEEP bit enables deeper power saving mode [OK]
Common Mistakes:
- Thinking it resets CPU
- Assuming it speeds up CPU
- Believing it disables interrupts permanently
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