Three Components Of A CPU
The Central Processing Unit, or the CPU, is the main part or component of the computer. It is the processor which allows all functions to take place within a computer. The three main parts of the CPU include the Input/Output, the Control Unit or CU, and the Arithmetic Logic Unit or the ALU. |
The Control Unit is responsible for controlling all operations of the CPU as well as the Computer. It does this by sending forth a control signal. It interprets instructions, regulates the timing of the processor and it also sends and receives control signals form various devices within the computer.
The Arithmetic Logic Unit or the ALU is responsible for all the calculations that take place within the computer. It also helps in making logical comparisons and hence the decisions. It has complicated circuits within it to accomplish these tasks.
The Central Processing Unit or the CPU also has many registers within it. Some of them are: Program Counter or PC, Instruction Decoder, Instruction Register or IR, Process Status Register and Accumulator or ACC. All of these perform special and specific functions. The Program Counter contains the address of the next operation which is to be performed. The Instruction register contains the instruction that is being carried out at the moment. The Process Status Register carries information about operations done by the CPU and the Accumulator stores the final results of the calculations carried out inside the ALU.
Apart from this, there are also many General Purpose Registers which store temporary information for the operations carried out at the moment or so.
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