与8051微处理器生成3线信号使用多个DS1267数字电位器

摘要：DS1267是一个双串行移位寄存器“型接口的数字电位器。移位寄存器的数据移入输入引脚以及转移的最后一位移位寄存器被写入时的数据输出引脚。这允许多个DS1267s菊花链连接在一起，并在同一串行总线编程。本应用笔记介绍了如何完成这个电路实例和伪代码例子展示了如何开发任何微处理器的代码。

Maxim>AppNotes>DIGITALPOTENTIOMETERSGENERALENGINEERINGTOPICSKeywords:DS1267,digitalpotentiometers,digipot,digitalpots,XicorMar29,2001APPLICATIONNOTE409UsingMultipleDS1267DigitalPotentiometersWithan8051MicroprocessorGenerating3-WireSignalsAbstract:TheDS1267isadualdigitalpotentiometerwithaserial"shiftregister"typeinterface.Theshiftregisterhasaninputpinwheredataisshiftedinaswellasanoutputpinwhichshiftsdataoutofthelastbitoftheshiftregisterwhenbeingwritten.ThisallowsmultipleDS1267stobedaisy-chainedtogetherandprogrammedtogetheronthesameserialbus.Theapplicationnotedescribeshowtoaccomplishthiswithcircuitexamplesandpseudocodeexamplesshowing