ARM Architecture - Power Modes
If an ARM processor reduces its voltage from 1.2V to 0.9V while keeping frequency constant, what is the expected effect on power consumption?
If an ARM processor reduces its voltage from 1.2V to 0.9V while keeping frequency constant, what is the expected effect on power consumption?
medium📝 Analysis Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Recall power formula
Dynamic power is proportional to voltage squared, so lowering voltage reduces power.Step 2: Analyze voltage change effect
Reducing voltage from 1.2V to 0.9V lowers power significantly.Final Answer:
Power consumption decreases significantly -> Option DQuick Check:
Lower voltage means less power used [OK]
Quick Trick: Power ∝ voltage², so lowering voltage saves power [OK]
Common Mistakes:
- Assuming power increases with lower voltage
- Ignoring voltage's squared effect on power
- Thinking frequency must change to affect power
Master "Power Modes" in ARM Architecture
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