What are the main components of a CPU?

CPU, also known as the central manager, is a very large-scale integrated circuit and is the computing core and control core of a computer. The main components of the CPU include arithmetic units and controllers.

#The operating environment of this article: Windows 7 system, Dell G3 computer.

CPU, also known as the central manager, is a very large-scale integrated circuit and is the computing core and control core of a computer. The main components of the CPU include arithmetic units and controllers.

The arithmetic unit is composed of an arithmetic logic unit (ALU), an accumulator, a status register, a general-purpose register group, etc.

ALU mainly completes fixed-point arithmetic operations, logical operations and various shift operations on binary information. The general-purpose register group is used to store the operands participating in operations and the intermediate results of operations. Status registers have different regulations in different machines. In programs, status bits are usually used as judgment conditions for transfer instructions.

The controller generally includes several parts such as instruction control logic, timing control logic, bus control logic, and interrupt control logic.

The instruction control logic must complete the operations of fetching instructions, analyzing instructions, and executing instructions. The timing control logic should provide the appropriate control signals for each instruction in time sequence.

Bus logic is the control circuit of the information path that serves multiple functional components. As far as the CPU is concerned, it is generally divided into an internal bus and an external bus that the CPU communicates with the outside world. The external bus is sometimes called the system bus, front-side bus (FSB), etc.

Interruption refers to the computer's abnormal event or some random event that needs to be processed immediately, causing the CPU to temporarily stop the execution of the current program, turn to another service program to handle the event, and then return to the original program after processing. the process of.

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