What Is The Role Of The CPU ?
The CPU, or the Central Processing Unit, is one of the main parts of the computer. In fact, it is the central component of the computer. Everything depends on the CPU, right from the operating system that can be used, the amount of energy that the PC will use, the software programs that can run on the computer and so on.
The CPU consists of three main parts. They are the arithmetic unit, the central control unit, and the memory along with registers. The history of the central processing unit goes back to the 1970s. In November 1971, the first single chip CPU of its kind was developed by Intel.
The central control unit is responsible for controlling all operations of the CPU as well as the computer. This is done by sending a signal known as control signal. The central control unit 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.
Apart from these components, the CPU also consists of many registers. These may perform very specific functions or general functions. Some of the Registers are Program Counter or PC, Instruction Decoder, Instruction Register or IR, Process Status Register and Accumulator or ACC.
The Program Counter contains the address of the next operation which is to be performed; while 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. Besides these, there are other general registers that carry information from the operations that are currently being processed inside the CPU.
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