The multi computer application system of single chip microcomputer scheme can be divided into functional distributed system, parallel multi computer processing and local network system.

(1) Functional distribution system. Multifunctional distributed system is a multi machine system set up to meet the requirements of multiple peripheral functions of engineering system.

(2) Parallel multi computer control system. Parallel multi computer control system mainly solves the problem of rapidity of engineering application system, so as to form a large-scale real-time engineering application system.

(3) Local network system. Single chip microcomputer can be divided into general type and special type according to the scope of application. Special type is designed for a specific product, such as single chip microcomputer for thermometer, single chip microcomputer for washing machine and so on. In the general-purpose single-chip microcomputer, it can be divided into 4-bit, 8-bit and 16 / 32-bit according to the word length. Although the microprocessor of the computer is almost 32 / 64 bit, and the 8-bit and 16-bit microprocessors have tended to shrink, the situation of single-chip microcomputer is different. The 8-bit single-chip microcomputer has low cost, low price and easy development. Its performance can meet most of the needs, only in aerospace, automobile Robot and other high-tech fields need to process a large amount of data at high speed, so 16 / 32 bits need to be selected. In general industrial fields, 8-bit general-purpose single chip microcomputer is still the most widely used single chip microcomputer at present.