The function of a control unit is to provide control signals and timing to direct the operation of other units. The control unit manages all of the computer resources and it directs the data flow between your devices and the Central Processing Unit.
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The Central Processing Unit (CPU)
Every i/o device is controlled by software. Every new device that is installed you must install its device drivers to control the device.
Hard wired control unit is faster than microprogrammed because it involves the use of combinational circuits to implement control logic whereas microprogrammed uses microprograms for the same purpose.
control unit
differce betwween these memory units