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时间: 2019-12-24 22:22
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Abstract:ThisarticleexplainshowtointerfaceaGPIOporttoanSPIperipheral.ItdefinesthebasicsoftheSPIprotocol,thesignalsandthefourtransfervariationsfortheSCKsignal.AsoftwareroutineisincludedtoimplementtheSPIinterfaceusingtheMAX7651,aflashprogrammable12-bitintegrateddata-acquisitionsystem.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSINTERFACECIRCUITSKeywords:SPI,SPIinterface,SCK,MOSI,MISO,CS,I/Oports,bitbanging,SPIperipheral.Sep17,2001APPLICATIONNOTE802InterfacingSPIPeripheralstotheMAX7651ProcessorAbstract:ThisarticleexplainshowtointerfaceaGPIOporttoanSPIperipheral.ItdefinesthebasicsoftheSPIprotocol,thesignalsandthefourtransfervariationsfortheSCKsignal.AsoftwareroutineisincludedtoimplementtheSPIinterfaceusingtheMAX7651,aflashprogrammable12-bitintegrateddata-acquisitionsystem.IntroductionTheSPIbusisa4-wireserialcommunicationsinterfaceusedbymanymicroprocessorperipheralchips.TheMAX7651microprocessordoesnotincludededicatedhardware……