Control Unit of Processor

PROSSECERS

The ALU and control unit of a computer are combined into a single unit called the Central Processing Unit. The CPU is truly the "brain" of the computer because it combines the circuitry that generates all the control signals needed to execute an instruction with the circuitry that actually performs the operations called by the instructions.

Now we will discuss about Control Unit but if you also want to know about Arithmetic logic unit you can check it out on my other blog.

CONTROL UNIT

A digital computer is a general purpose digital system. A general-purpose digital computer is capable of executing various operations and in addition, can be instructed as to what specific sequence of operations it must perform.

The user of such a system can control the process by means of a program, that is, a set of instructions that specify the operations, operands and the sequence by which processing has to occur. The data processing task may be altered simply by specifying a new program with different instructions or specifying the instructions with different data.

A computer instruction is a binary code that specifies a sequence of micro-operations for the computer. Instruction codes together with data are stored in memory. The control unit fetches an instruction from main memory by sending an address and a READ command to the main memory. The instruction word comes from memory in the control in the control unit to determine which operation is to be performed. Once this unit, The instruction which is in binary code is then decoded by logic circuits is determined, the control unit generates the signals needed to actually execute the operations. Thus, we can say that the control nit's function is to fetch, decode and execute the instructions that are in memory.

The control unit contains logic and timing circuits that generate the signals needed to execute each instruction of a program one by one. The control unit performs these same steps till the last instruction of the program is executed. It directs and coordinates the operation of all the other parts of the computer by providing timing and control signals.

I hope I have provided you much information.

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