Central processing unit (CPU), is one of the main electronic computer equipment, computer in the core accessories. Its main function is to interpret computer instructions and process data in computer software. CPU is the core component of the computer which is responsible for reading, decoding and executing the instructions. The central processing unit mainly includes two parts, that is, the controller, the computer, which also includes the cache and the data and control bus that realize the connection between them. The three core components of electronic computer are CPU, internal memory and input/output device. The main function of the central processing unit is to process instructions, perform operations, control time, and process data.
In the computer architecture, CPU is the core hardware unit that controls and allocates all hardware resources (such as memory and input/output unit) of the computer and performs general operations. CPU is the computing and control core of a computer. The operations of all software layers in a computer system are eventually mapped to the operations of the CPU through the instruction set.

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