8051单片机包含中央处理器、程序存储器(ROM)、数据存储器(RAM)、定时/计数器、并行接口、串行接口和中断系统等几大单元及数据总线、地址总线和控制总线等三大总线，现在我们分别加以说-8051 contains the CPU, program memory (ROM), data memory (RAM), timer/counter, parallel port, serial port and interrupt system, several modules and data bus, address bus and control bus three-bus, and now we were said to be