Question

Adventages and dis advantage of micro programmed control unit in detail

Answer 1

.Advantages:-The decoders and sequencing logic unit of a micro-programmed control unit are verysimple pieces of logic, compared to the hardwired control unit, which contains complexlogic for sequencing through the many micro-operations of the instruction cycle. Itsimplifies the design of the control unit. Simpler design means the control unit ischeaper and less error-prone to implement-It is also flexible as changes could be easily made to the designPrincipal Disadvantage:-Slower than a hardwired unit of comparable technologyHardwired control unit is used for RISC Architecture because hardwired is faster and canimprove the performanceMicroprogrammed control unit is used for CISC because it makes the design simpler andusually in CISC architecture, due to huge number of instructions in the instruction set, thecontrol unit is quite complex. Hence it justifies using microprogrammed control unit

Answer 2

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Answer

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Advantages of Micro programmed control unit :

- Flexible and structured designed.

- Testing sequences can be easily incorporated.

- Easy to document and debug.

Disadvantages of Micro programming control unit :

- Expensive especially for smaller designs.

- Slower than random logic.