单片微型计算机是微型计算机发展中的一个重要分支，是把构成一台微型计算机的主要部件如中央处理器(CPU)、存储器(RAM/ROM)和各种功能I/O接口集成在一块芯片上的单芯片微型计算机(Single Chip Micro Computer),简称单片机.由于它的结构与指令功能都是按工业控制要求设计的,且近年来单片机着力扩展了各种控制功能如A/D、PWM等,因此我们更多时候称其为一个单片形态的微控制器(Single Chip Micro Controller),或直接称其为微控制器(Micro Controller)。-Single-chip micro-computer micro-computer are in the development of an important branch, is to constitute a mini-computer' s main components such as central processing unit (CPU), memory (RAM/ROM) and a variety of functional I/O interface integrated in a chip The single-chip micro-computer (Single Chip Micro Computer), referred to as single-chip microcomputer. Because of its structure and command control functions are designed by industry, and that in recent years focus on the expansion of a variety of single-chip control functions such as A/D, PWM, etc., so we more often called a single-chip microcontroller patterns (Single Chip Micro Controller), or directly called microcontrollers (Micro Controller).