I^2C总线在单片机串行扩展中的应用  

Application of I^2C Bus in Serial Extension of Microcontroller

作　　者：高晓红[1] 

机构地区：[1]长沙师范学校,湖南长沙410100

出　　处：《吉首大学学报（自然科学版）》2008年第1期79-82,共4页Journal of Jishou University(Natural Sciences Edition)

摘　　要：介绍I2C总线的结构、工作原理、数据传输方式和优点,对于不带I2C总线接口的单片机,利用其常规的I/O口来模拟I2C总线接口,消除了串行扩展的局限性,并设计了数字温度传感器DS1624与不带I2C总线接口的单片机AT89C52的硬件系统,给出了软件实现的流程图及汇编语言程序.On the basis of introduction of the structure, principle and mode of data trassmission of I^2C bus, the paper summarizes the advantages of I^2C bus. As for the microcontroller without I^2C bus interface, it can use the rnicrocontroller＇ s I/O interface to simulate I^2C bus, which provides a simple way to realize serial extension. According to the application of I^2C bus to the temperature controlling system, the design of hardware and the software program in assemble language are introduced in detail.

关 键 词：I^2C总线 单片机 DSl624 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]