I^2C总线技术在单片机串行扩展中的应用  

Application of I^2C Bμs Technique in Serial Extension of Micro-controller Unit

作　　者：邓忠华[1] 李霞[1] 陈浩[1] 

机构地区：[1]华中科技大学控制科学与工程系,武汉430074

出　　处：《武汉理工大学学报（交通科学与工程版）》2005年第2期227-229,247,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：在介绍I2 C总线的结构、工作原理和数据传输方式等特点的基础上,总结了I2 C总线的优点.对于不带I2 C总线接口的单片机,利用其常规I/O口模拟I2 C总线接口,消除了串行扩展的局限性.结合温度控制系统中的应用实例,文章还简要介绍了不带I2 C总线接口的80 KC1 96单片机与I2 C器件AT2 4C1 6串行扩展的硬件设计,并给出了软件实现的部分汇编语言程序.On the basis of introduction to the structure, principles and mode of data transmission of I2C bus, the paper summarizes the advantages of I2C bus technique. As for the micro-controller unit (MCU) without I2C bus interface, it can use the MCU's I/O interface to simulate I2C bus, which provides a simple way to realize serial extension. According to the application of I2C bus technique to the temperature controlling system, the paper also simply introduces the hardware design and the software program in assemble language.

关 键 词：I^2C总线 单片机 AT24C16器件 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]