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在智能仪表或数字仪表中,单片机通常通过并行总线扩展外围器件。由于单片机并行总线本身并未形成标准,扩展连线多,外围器件工作方式不同,给应用系统设计带来了很多的不便。新型的单片机技术则较好的解决了这个问题。1.I~2C 总线技术I~2C 总线具有十分完善的总线协议,可构成多主系统。I~2C 总线为双向同步串行总线,因此 I~2C 总线接口内部为双向传
In smart meters or digital meters, microcontrollers typically extend peripheral devices through parallel buses. As the SCM itself does not form a standard parallel bus, extended connections and more peripheral devices work in different ways, to the application system design has brought a lot of inconvenience. The new microcontroller technology is a better solution to this problem. 1.I ~ 2C bus technology I ~ 2C bus has a very complete bus protocol, can constitute a multi-master system. I ~ 2C bus for bidirectional synchronous serial bus, so I ~ 2C bus interface for the two-way pass