AT89C51是一个低电压，高性能CMOS 8位单片机，片内含4k bytes的可反复擦写的Flash只读程序存储器和128 bytes的随机存取数据存储器（RAM），器件采用ATMEL公司的高密度、非易失性存储技术生产，兼容标准MCS-51指令系统，内置功能强大的微型计算机的AT89C51提供了高性价比的解决方案-AT89C51 is a low-voltage, high-performance CMOS 8-bit single chip, the chip contains 4k bytes of Flash to repeatedly write read-only program memory and 128 bytes of random access data memory (RAM), devices using the company' s high-ATMEL density, non-volatile memory technology, compatible with the standard MCS-51 instruction set, built-in powerful AT89C51 micro-computer provides a cost-effective solutions