数字音频广播

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1、DigitalAudioBroadcastingXilinxSolutionsforDABReceiverSystemsPortableDABReceiverIssues•AddingDABfunctionalitytoexistingunits•InterfacingDABchipsetstoprocessors•AddingotherfeaturestoDABunits–e.g.GPSnavigation•Customdisplaysupport•Powermanagement•Lackofboardsp

2、aceSystemGlueDABRFDABRFBatteryBatteryMemoryMemoryDisplayDisplayMainProcessororMainProcessororEmbeddeduPEmbeddeduPKeypadKeypadBluetoothBluetoothNetworkNetworkAdd-onAdd-onInterfacefeaturesand/ornetworkstothehostprocessorAddDABtoexistingapplicationsoraddnewfun

3、ctionstoDABunitPortableDABReceiverLCDLCDKeypadAdd-OnEmbeddedLogicInterfaceMixedSignalDABXilinxRFADCReceiverCPLDCPUNon-XilinxASSPCPUSRAMBluetoothModuleMemoryFlashFlashXilinxCompactCompactBatteryBatteriesFlashFlashLowestPowerCPLDSolutionPower(mW)Typicalstandb

4、ypower300,000µW200360mW*Dynamic150TypicalstandbypowerTypicalstandbypower1.8VX2000µA=3600µW1.8VX25uA=45µW10036mW*Dynamic12mW*Dynamic50*Estimated128macrocellSenseAmpOtherCMOSdevicewitheightBasedCPLDsCPLDs16-bitcounters@50MHzKeepingProcessorsAsleep•Reducingthe

5、numberofinterruptstoaprocessorwillincreaseitstimeinapowersavingstate•AlowpowerCPLDthatrespondstoandhandlessysteminterruptswillperformsuchataskIncomingDataCoolRunnerCPLDMicroprocessorandInterrupts(DataAcquisition)(DataProcessing)SystemDevicesInterruptHandlin

6、g•Twointerrupttypes–Dataacquisition–Dataprocessing•DataacquisitioninterruptscanbeservicedbyCPLD–Memoryaccess–I2C,UART,SPI,ISA–GeneralpurposeI/O–LCDinterface•Downloaddesignforfree!PowerSavingBenefitsCoolRunner-IINormalNormalPowerIncreasedPowerSavingSavingAre

7、aAreaIdle100%Idle100%PowerConsumptionPowerConsumptionSleepSleep100%100%OperatingTimeOperatingTimeMicroprocessorandStandaloneMicroprocessorSystemBatteryManagement•Typicalbatterymanagementissues:–Littleadvanceknowledgethatabouttorunout–Can’tdetermineifcapable

8、ofsupplyingadequatepowerforadditionalload(e.g.tospinaharddrive)–Chargersmustbetailoredforusewithaspecificbatterychemistry•MaycausedamageifusedwithadifferentchemistryOnesolutionistouseSmartBatteriesandS