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A micro programmed control unit

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  1. Is faster than a hardwired unit
  2. Facilitates easy implementation of a new instruction
  3. Is useful when small programs are to be run
  4. All of the above

Answer (Detailed Solution Below)

Option 2 : Facilitates easy implementation of a new instruction
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Detailed Solution

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Difference between Microprogrammed Control Unit and Hardwired Control Unit

Microprogrammed Control Unit

Hardwired Control Unit

It is implemented by programming

It is a circuitry approach

CISC style instructions

RISC style instructions

Modifications are easy as it will require the change in the code section only.

Modification is difficult as the control unit is hardwired

It works well for complex instructions also

It works well for simple instructions

Implementing microprograms is not costly

Implementing hardwired structure is costly

Slower execution

Faster execution

 

Therefore, a micro programmed control unit facilitates easy implementation of a new instruction
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