Set a single-chip CPU, RAM, ROM, I / O port and interrupt part of the system in one device, plus the need to be able to realize the power of crystal and digital information processing and control.

• 单片机是一种集CPU、RAM、ROM、I/O接口和中断系统等部分于一体的器件，只需要外加电源和晶振就可实现对数字信息的处理和控制。