I²C接口连接Compact Flash卡微控制器

摘要：本应用笔记介绍了如何使用一个I²C我/O的扩展到一个紧凑的闪存（CF）卡连接的I²C的微控制器的接口。用于读取和写入数据的软件命令进行解释。MAX7311I/O端口扩展的特点是在设计电路。

Maxim>AppNotes>CommunicationsCircuitsInterfaceCircuitsMemoryKeywords:datalogging,flashcard,I2Cinterface,16-bitI/OextenderAug31,2009APPLICATIONNOTE4418ICInterfaceConnectsCompactFlashCardtoMicrocontrollerBy:FonsJanssenAbstract:ThisapplicationnoteexplainshowtouseanICI/Oextendertoconnectacompact-flash(CF)cardtotheICinterfaceofamicrocontroller.Thesoftwarecommandsforreadingandwritingdataareexplained.TheMAX7311I/Oportextenderisfeaturedinthedesigncircuit.ThisdesignideaappearedintheSeptember1,2006issueofEDNmagazine.Dataloggingusuallyrequiresconsiderablememoryforstoringthemeasureddata,especiallywhenthenumberofmonitoredchannelsislarge.Asafurthe