Cpu functions include: 1. Sequence control, which refers to the execution sequence of instructions in the control program; 2. Operation control, where the control components act according to the requirements of the instructions; 3. Time control, which implements time-based control of various operations. Timing; 4. Data processing, performing arithmetic operations and logical operations on data.
Central processing unit (CPU), as the computing and control core of the computer system, is the final execution unit for information processing and program execution. Since its creation, CPU has made great progress in logical structure, operating efficiency and function extension.
The CPU has four main functions, namely sequence control, operation control, time control, and data processing.
1. Sequence control: This refers to the execution sequence of instructions in the control program. There is a strict sequence between the instructions in the program, and they must be executed strictly in the order specified by the program to ensure the correctness of the computer's work.
2. Operation control: The function of an instruction is often realized by a series of operations performed by components in the computer. The CPU should generate corresponding operation control signals according to the function of the instruction and send them to the corresponding components, thereby controlling these components to act according to the requirements of the instruction.
3. Time control: Time control is to implement time timing for various operations. During the execution of an instruction, what operations are performed at what time should be strictly controlled. Only in this way can the computer work automatically and in an orderly manner.
4. Data processing: that is, performing arithmetic operations and logical operations on data, or performing other information processing.
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