ARM Architecture - Power Modes
Given an ARM system configured to wake up on a timer interrupt and an external GPIO interrupt, what happens if both interrupts occur simultaneously?
Given an ARM system configured to wake up on a timer interrupt and an external GPIO interrupt, what happens if both interrupts occur simultaneously?
medium📝 Analysis Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand simultaneous wake-up sources
ARM systems can handle multiple wake-up sources; simultaneous interrupts trigger wake-up.Step 2: Determine interrupt handling
The system wakes up and processes interrupts in priority or arrival order.Final Answer:
The system wakes up and handles both interrupts in order -> Option BQuick Check:
Multiple wake-up sources = Wake and handle all [OK]
Quick Trick: Multiple wake-ups handled sequentially [OK]
Common Mistakes:
- Assuming interrupts are ignored if simultaneous
- Thinking only one interrupt wakes the system
- Confusing wake-up with system reset
Master "Power Modes" in ARM Architecture
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