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This article mainly introduces the function of the controller in the microcomputer, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let the editor take you to know it.

The basic function of the controller in a microcomputer is to control the parts of the computer to work harmoniously. The controller is composed of program counter, instruction register, instruction decoder, timing generator and operation controller, which is responsible for coordinating and directing the operation of the whole computer system.

In a microcomputer, the basic function of the controller is to control the parts of the computer to work in harmony.

The controller refers to the main command device which controls the starting, speed regulation, braking and reverse of the motor by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit according to the predetermined order. It is composed of program counter, instruction register, instruction decoder, timing generator and operation controller. it is the "decision-making body" that issues commands, that is, to coordinate and direct the operation of the whole computer system.

The controller is divided into a combined logic controller and a microprogram controller, and the two controllers have their own advantages and disadvantages. The design of combinational logic controller is troublesome and its structure is complex. Once the design is completed, it can no longer be modified or expanded, but its speed is fast. The design of the microprogram controller is convenient, the structure is simple, and it is convenient to modify or expand. To modify the function of a machine instruction, you only need to reprogram the corresponding microprogram. To add a machine instruction, you only need to add a microprogram to the control memory. However, it is by executing a microprogram. The specific comparison is as follows: the combinational logic controller, also known as the hard wiring controller, is composed of logic circuits and relies entirely on hardware to realize the function of instructions.

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