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Question : 100 of 100
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The correct answer is option 2, i.e.
Control unit The control unit is a component of the central processing unit (CPU) that directs the operation of the processor.
There are two types of control units -
- Hardwired control unit
- Micro-programmable control unit.
Components that include the physical parts of a computer are called hardware.
Difference between two types of control units -
| Hardwired Control Unit | Micro programmed Control Unit |
| It is a circuitry approach | This control unit is implemented by programming |
| RISC style instructions | CISC style instructions |
| Modification is difficult as the control unit is hardwired. Modifying it will require the change in hardware. | Modifications are easy incase of the microprogrammed control unit as it will require a change in the code only. |
| It works well for simple instructions | It works well for complex instructions also |
| Implementing a hardwired structure requires a cost. | Implementing microprograms is not costly. |
| No control memory is required | Control memory is required |
| Faster execution | Comparatively slow |
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