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This article mainly introduces how the hardware system of the microcomputer is composed, 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 hardware system of microcomputer consists of four parts: arithmetic unit, controller, memory (including memory, external memory and cache) and various input and output devices. A complete microcomputer system consists of hardware system and software system.

There are three levels of microcomputer system from global to local: microcomputer system, microcomputer and microprocessor (CPU). Neither a simple microprocessor nor a simple microcomputer can work independently, and only the microcomputer system is a complete information processing system, which has practical significance.

A complete microcomputer system includes two parts: hardware system and software system. The hardware system is composed of arithmetic unit, controller, memory (including memory, external memory and cache), various input and output devices, and works in "instruction-driven" mode.

Software system can be divided into system software and application software. System software refers to the software that manages, monitors and maintains computer resources (including hardware and software). It mainly includes: operating system, various language processing programs, database management system and various tools and software, etc. Among them, the operating system is the core of the system software, and users can complete all kinds of operations on the computer only through the operating system. Application software is a computer program for a certain application purpose, such as word processing software, graphics and image processing software, network communication software, financial management software, CAD software, various program packages and so on.

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