模拟开关扩展I²C接口

摘要：设计理念，概述了如何使用的I²C控制的模拟开关连接到一个I²C总线上的设备数量增加两倍。Maxim>AppNotes>AnalogSwitchesandMultiplexersInterfaceCircuitsKeywords:I2C,analogswitch,clockdataSDASCLportexpansion,analogueswitchApr12,2002APPLICATIONNOTE955AnalogSwitchExpandsICInterfaceAbstract:DesignideaoutlininghowtouseanIC-controlledanalogswitchtotriplethenumberofdevicesconnectedtoanICbus.Perhapsthemosteffectivewaytogainboardspaceandincreasecomponentdensityistominimizewiringontheboard.AwidelyusedarchitecturethatallowssuchminiaturizationistheICbus.Comprisingonlyabidirectionaldataline,SDA,andaclockline,SCL,thisbusrequiresnochipselectsorotheradditionalconnections.MicrocontrollersfromPhilips,Microchip,a