RDA5820系列编程指南

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1、RDA5820系列2011.7.23RDA5820系列编程指南V3.0TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.1RDA5820一、说明RDA5820系列包括RDA5820、RDA5820NS，下文简称为RDA5820。Theinformationcontainedhereinisthe

2、exclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.2RDA5820二控制接口RDA5820提供两种控制接口，I2C和SPI3线，控制接口的选择通过PIN7:MODE上设置高低电平来选择。MODE:0I2C;MODE:1SPI。两种接口的控制模式如下描述:(一)、I2C控制接口：I2C接口与I2C-BusSpecification2.1兼容，包含2个信号：SC

3、LK和SDIO。I2C接口是由START，命令字节，数据字节，及每个字节后的ACK或NACK比特，和STOP组成，命令字节包括一个7比特的chip地址（0010001b）和一个读写r/w命令比特。ACK（或NACK）由接收器发出。读写方式和器件地址详细描述如下：1、RDA5820的读写方式标准I2C读写方式一致，即带寄存器地址的方式，I2C器件地址为0010001B，加上读写标志位，即为0x22(写操作)和0x23(读操作)，读写方式的格式如下：I2CCHIPREGISTERREGISTERREGISTERA/STARTWAAASTOPADDRE

4、SSADDRESSBIT<15:8>BIT<7:0>NA图1RDA5820I2C写格式I2CCHIPREGISTERA/I2CCHIPREGISTERREGISTERSTARTWASTARTRAANASTOPADDRESSADDRESSNAADDRESSBIT<15:8>BIT<7:0>图2RDA5820I2C读格式FrommastertoslaveA=acknowledge(SDALOW)S=STARTconditionFromslavetomasterNA=notacknowledge(SDAHIGH)P=STOPconditionThein

5、formationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.3RDA5820tsu:stathd:sta0010001tsu:datthd:dattsptsu:stotbufSDIOSCLK1-7891-781-781-78999CHIPREGISTERSTARTaddressWACKADDRESSACKDATAh

6、ighbyteACKDATAlowbyteACKSTOPSTART图3I2C接口写数据时序tsu:stathd:sta0010001tsu:datthd:dattsptsptsu:stotbufSDIOSCLK1-7891-781-781-781-78999CHIPREGISTERRESTARCHIPSTARTaddresWACKADDRESSACKTaddresRACKDatahighbyteACKDatalowbyteNACKSTOPSTARTss图4I2C接口读数据时序I2CTimingCharacteristicsParameterSym

7、bolTestMinTypMaxUnitConditionSCLKFrequencyfscl0－400KHzSCLKHighTimethigh0.6－－usSCLKLowTimetlow1.3－－usSetupTimeforSTARTtsu:sta0.6－－usConditionHoldTimeforSTARTConditionthd:sta0.6－－usSetupTimeforSTOPconditiontsu:sto0.6－－usSDIOInputtoSCLK↑Setuptsu:dat100－－nsSDIOInputtoSCLK↓Holdthd

8、:dat0－900nsSTOPtoSTARTTimetbuf1.3－－usSDIOOutputFallTimetf:out20+0.1C