单片机是一种集成电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计时器等功能（可能还包括显示驱动电路、脉宽调制电路、模拟多路转换器、A/D转换器等电路）集成到一块硅片上构成的一个小而完善的微型计算机系统，在工业控制领域的广泛应用-The microcontroller is an integrated circuit chip, ultra-large-scale integrated circuit technology central processor CPU data processing capabilities of random access memory RAM, ROM read-only memory, and a variety of I/O port and interrupt system, the timer/timer function (which may also include a display drive circuit, the pulse width modulation circuit, analog multiplexer, A/D converter circuit) integrated into a silicon wafer consisting of a small and improve the micro-computer system, in the field of industrial control. widely used