A control unit is the part of a CPU or other device that directs its operation. The
outputs of the unit control the activity of the rest of the device. A control unit can be
thought of as a finite state machine. It is called the brain of computer microprcessor. It
manages whole process of the microprocessor. For it identifes which data is sent to the
ALU or memory etc.
At one time control units for CPUs were ad-hoc logic, and they were difficult to design.
Now they are often implemented as a microprogram that is stored in a control store.
outputs of the unit control the activity of the rest of the device. A control unit can be
thought of as a finite state machine. It is called the brain of computer microprcessor. It
manages whole process of the microprocessor. For it identifes which data is sent to the
ALU or memory etc.
At one time control units for CPUs were ad-hoc logic, and they were difficult to design.
Now they are often implemented as a microprogram that is stored in a control store.
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