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What is the primary benefit of using clock gating in ARM processors?

easy📝 Conceptual Q1 of 15
ARM Architecture - Power Modes
What is the primary benefit of using clock gating in ARM processors?
AEnhancing memory capacity by gating the clock
BIncreasing the clock speed of the processor
CReducing power consumption by stopping the clock signal to idle modules
DImproving the processor's heat dissipation by adding fans
Step-by-Step Solution
Solution:

  1. Step 1: Understand clock gating function

    Clock gating stops the clock signal to parts of the processor that are not in use.

  2. Step 2: Identify the effect on power

    Stopping the clock reduces switching activity, which lowers power consumption.

  3. Final Answer:

    Reducing power consumption by stopping the clock signal to idle modules -> Option C

  4. Quick Check:

    Power saving = Reducing clock to idle parts [OK]
Quick Trick: Clock gating saves power by stopping clocks to unused parts [OK]
Common Mistakes:
  • Confusing clock gating with increasing clock speed
  • Thinking clock gating adds hardware like fans
  • Assuming clock gating increases memory size

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