AT24系列存贮器和AT89系列单片机的特征及总线状态作为介绍，并以AT24C01与AT89C2051为例详细描述了通用存贮器IC卡的工作原理及用单片机对其进行读写操作的基本电路连接和软件编程方法-AT24 and AT89 Series memory microcontroller series and the characteristics of the state as the bus, the and AT89C2051 AT24C01 and described in detail as an example of universal memory IC card and the working principle MCU with its reading and writing operation of the circuit connections and basic software programming