Differentiate between hardwired control unit and a micro programmed control unit.

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Suresh Chand · Accepted Answer

The differentiate between hardwired control unit and a micro programmed control unit are Hardwired Control Unit Microprogrammed Control Unit Hardwired control unit generates the control signals needed for the processor using logic circuits Microprogrammed control unit generates the control signals with the help of micro instructions stored in control memory Hardwired control unit is faster when compared to microprogrammed control unit as the required control signals are generated with the help of hardwires This is slower than the other as micro instructions are used for generating signals here Difficult to modify as the control signals that need to be generated are hard wired Easy to modify as the modification need to be done only at the instruction level More costlier as everything has to be realized in terms of logic gates Less costlier than hardwired control as only micro instructions are used for generating control signals It cannot handle complex instructions as the circuit design for it becomes complex It can handle complex instructions Only limited number of instructions are used due to the hardware implementation Control signals for many instructions can be generated Used in computer that makes use of Reduced Instruction Set Computers(RISC) Used in computer that makes use of Complex Instruction Set Computers(CISC)

Differentiate between hardwired control unit and a micro programmed control unit.

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Differentiate between hardwired control unit and a micro programmed control unit.

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