AT89C51是一种带4K字节闪烁可编程可擦除只读存储器（FPEROM—Falsh Programmable and Erasable Read Only Memory）的低电压，高性能CMOS8位微处理器，俗称单片机。该器件采用ATMEL高密度非易失存储器制造技术制造，与工业标准的MCS-51指令集和输出管脚相兼容。由于将多功能8位CPU和闪烁存储器组合在单个芯片中，ATMEL的AT89C51是一种高效微控制器，为很多嵌入式控制系统提供了一种灵活性高且价廉的方案。-AT89C51 is a kind of programmable 4K byte scintillation-ROM can be erased (FPEROM - Falsh : navigation, and Programmable Read Only Memory ry) low-voltage, high-performance microprocessor CMOS8 spaces, commonly called SCM. The device used ATMEL high-density non-volatile memory technology manufacturing, and the industry-standard MCS-51 instruction set and output pin compatible. Owing to the multi-function eight CPU and Flash Memory portfolio in a single chip, ATMEL the AT89C51 is a high-performance microcontroller, many embedded control systems to provide a highly flexible and inexpensive program.