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GK QUESTION#1307

Compared to a hardwired control unit, what is the primary architectural advantage of a microprogrammed control unit?

  1. ALower power consumption
  2. BGreater flexibility in modifying or updating the instruction setCorrect answer
  3. CHigher execution speed
  4. DFewer physical logic gates required
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Answer

B. Greater flexibility in modifying or updating the instruction set

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Explanation

In a microprogrammed control unit, control signals are generated through microinstructions stored in memory. Modifying or adding instructions only requires updating the microcode, not redesigning hardware. A hardwired control unit needs physical circuit changes for updates.

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