摘要
Dallas公司推出了一种专有的单总线技术.该技术具有结构简单、成本低廉、便于扩展和维护等优点.单总线仅定义有一根信号线,时间信息和数据均经该信号线传递.每个单总线器件都具有惟一的64位ROM码,主机可根据它来区分挂在同一总线上的不同单总线器件.单总线器件可以采用寄生电源供电或外部电源供电.访问单总线网络上的器件包括3个步骤:初始化命令;传送ROM命令;传送RAM命令.给出了单总线器件DS18B20在单片机系统中的应用实例.
The single wire bus technology, developed by Dallas Semiconductor, has such advantages as simple structure, low cost, easy expansion and maintenance. The single wire bus has got only a single line by definition, and the time information and data is transmitted via this line. Each of its devices has a unique ROM code, which is 64-bits long. Its master can distinguish its different devices on the same bus according to the ROM code. Its device can be parasite powered or supplied with external power. The protocol for accessing its devices is as follows： initialization, issuing ROM function command and issuing RAM function command. Application of the single wire bus device DS18B20 in the MCU system is also given.
出处
《西安文理学院学报（自然科学版）》
2006年第2期62-65,共4页
Journal of Xi’an University(Natural Science Edition)
关键词
单总线
器件
网络
应用
single wire bus
device
network
application
