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Clock speed and power

Dynamic power in CMOS logic roughly follows P = C x V^2 x f. Which change usually saves the most energy for a task that sleeps most of the time?

A.Running at the highest clock speed to finish fast, then entering deep sleepB.Keeping the CPU awake at a low clock all the timeC.Disabling the brown-out detectorD.Using a larger RAM buffer

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Clock speed and power

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