【摘要】 以应用广泛的1 W ire总线数字温度传感器DS18B 20为例,介绍了DS18B 20的硬件结构、操作顺序、信号时序,同时结合实际应用,用该器件与AT 89C 2051构成一个测温系统,并给出了具体程序设计方法。最后说明了DS18B 20设计中应注意的几个问题。更多还原

【Abstract】 Taking the 1Wire bus digital thermometer as an example,the hardware configuration,the operating sequence and timing graphic of DS18B20 are introduced in this paper.Combining the practical application,a measuring system of AT89C2051 with the DS18B20 is designed and a concrete programming method is offered.At last,the problem to be noticed during the design phase are shown.更多还原