Clock gating for power saving in ARM Architecture - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to describe what clock gating does in a processor.

ARM Architecture

Clock gating is a technique used to [1] the clock signal to parts of a processor to save power.

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Adelay

Bamplify

Cduplicate

Ddisable

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'amplify' because it sounds like increasing performance.

Choosing 'delay' thinking it slows down the clock instead of stopping it.

Clock gating disables the clock signal to unused parts of the processor, reducing power consumption.

2fill in blank

medium

Complete the sentence to explain the main benefit of clock gating.

ARM Architecture

The main benefit of clock gating is to [1] power consumption without affecting performance.

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Aincrease

Bignore

Creduce

Dmeasure

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'increase' because it sounds like improving something.

Choosing 'measure' confusing power saving with monitoring.

Clock gating reduces power consumption by stopping the clock signal to inactive parts, saving energy.

3fill in blank

hard

Fix the error in the explanation about clock gating.

ARM Architecture

Clock gating works by [1] the clock signal to inactive modules, preventing unnecessary switching activity.

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Aenabling

Bdisabling

Cduplicating

Dspeeding

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'enabling' which is the opposite of what clock gating does.

Choosing 'speeding' which is unrelated to clock gating.

The correct action is disabling the clock signal to inactive modules to save power.

4fill in blank

hard

Fill both blanks to complete the dictionary comprehension describing clock gating.

ARM Architecture

power_saving = {module: [1] for module in modules if module [2] 'inactive'}

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A'gated_clock'

B==

C!=

D'active'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '==' causing wrong filtering.

Using 'active' instead of 'inactive' in the condition.

The dictionary maps inactive modules to 'gated_clock' indicating clock gating is applied.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension for clock gating status.

ARM Architecture

clock_status = [1]: [2] for [3] in components if components[[3]] == 'idle'}

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Acomp

B'gated'

D'active'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'active' instead of 'gated' as the value.

Using different variable names for key and loop variable.

This comprehension creates a dictionary mapping each idle component (comp) to the status 'gated'.