ARM Architecture - Power Modes
Which of the following is commonly used as a wake-up source in ARM devices?
Which of the following is commonly used as a wake-up source in ARM devices?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify typical wake-up sources
Common wake-up sources include external interrupts like button presses or signals from peripherals.Step 2: Evaluate the options
Only an external interrupt from a button press can wake the system; others do not cause wake-up.Final Answer:
External interrupt from a button press -> Option AQuick Check:
Common wake-up source = External interrupt [OK]
Quick Trick: Buttons often act as wake-up triggers [OK]
Common Mistakes:
- Thinking CPU frequency changes wake the system
- Assuming memory writes cause wake-up
- Confusing power supply disabling with wake-up
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