BR262-comm-config-guide

DSPSystems®R262M-20792-001ONSemiconductorJune2012Thisdocumentmaynotberedistributedortransmittedinanyform.Copyright©2012SemiconductorComponentsIndustries,LLCd/b/aONSemiconductor.ONSemiconductorandtheONlogoareregisteredtrademarksofSemiconductorComponentsIndustries,LLC(ONSemiconductor).BelaSignaandSignaKlaraAllotherbrands,productnamesandcompanynamesmentionedhereinmaybetrademarksorregisteredtrademarksoftheirrespectiveholders.ONSemiconductorreservestherighttomakechangeswithoutfurthernoticetoanyproductsherein.ONSemiconductormakesnowarranty,representationorguaranteeregardingitsproductsincludingsuitabilityforanyparticularpurpose,nordoesONSemiconductorassumeanyliabilityarisingoutoftheapplicationoruseofanyproductorcircuit,andspecificallydisclaimsanyandallliability,includingwithoutlimitationspecial,consequentialorincidentaldamages.TypicalparameterswhichmaybeprovidedinONSemiconductordatasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime.Alloperatingparameters,includingTypicalsmustbevalidatedforeachcustomerapplicationbycustomer'stechnicalexperts.ONSemiconductordoesnotconveyanylicenseunderitspatentrightsnortherightsofothers.ONSemiconductorproductsarenotdesigned,intended,orauthorizedforuseascomponentsinsystemsintendedforsurgicalimplantintothebody,orotherapplicationsintendedtosupportorsustainlife,orforanyotherapplicationinwhichthefailureoftheONSemiconductorproductcouldcreateasituationwherepersonalinjuryordeathmayoccur,unlessotherwiseexpresslyagreedtoinwritingbyONSemiconductorandBUYER.ShouldBuyerpurchaseoruseONSemiconductorproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdONSemiconductoranditsofficers,employees,subsidiaries,affiliates,anddistributorsharmlessagainstallclaims,costs,damages,andexpenses,andreasonableattorneyfeesarisingoutof,directlyorindirectly,anyclaimofpersonalinjuryordeathassociatedwithsuchunintendedorunauthorizeduse,evenifsuchclaimallegesthatONSemiconductorwasnegligentregardingthedesignormanufactureofthepart.ONSemiconductorisanEqualOpportunity/AffirmativeActionEmployer.Literatureissubjecttoallapplicablecopyrightlawsandisnotforresaleinanymanner.Tomaintainthequalityofourpublications,werequestyourcommentsontheaccuracy,clarity,organization,andvalueofthisdocument.Addresscorrespondenceto:[e-mail]conductor200-611KumpfDriveWaterloo,Ontario,CanadaN2V1K8Tel:[phone]Europe,MiddleEastandAfricaONSemiconductorChamps-Montants12a2074Marin,SwitzerlandTel:[phone]iCOMMUNICATIONSANDCONFIGURATIONGUIDE1.Introduction11.1Purpose.....................11.2IntendedAudience.................11.3Conventions...................11.4ManualOrganization................11.5FurtherReading..................22.SystemArchitecture32.1Overview.....................32.2DSPProcessorandMemory.............42.3Clocking.....................42.3.1Overview.....................42.3.2PLL......................52.3.2.1PLLMode...................52.3.2.2Free-RunningMode................72.3.3SamplingRateControl................72.3.4ExternalClockActivityDetector..............82.3.5MCLKSynchronization................82.4PowerManagement.................82.5InputStage....................102.5.1Overview....................102.5.2InputSelection..................102.5.3Pre-amplifiers..................112.5.4LineOut....................112.5.5A/DConverters..................112.5.6MicrophoneBiasVoltage...............122.6OutputStage...................122.6.1Overview....................122.6.2DMICInterface..................132.6.3DirectDigitalOutputDriver..............142.6.4AnalogOutputs..................14TABLEOFCONTENTSiiCOMMUNICATIONSANDCONFIGURATIONGUIDE2.7Interfaces.....................142.7.1Overview....................142.7.2GeneralPurposeInput/Output(GPIO)Pins.........152.7.3SPIPort....................152.7.4Low-SpeedA/DConverters..............162.7.5UART.....................162.7.6PCM.....................162.7.7I2C......................163.DefaultApplication173.1Overview.....................173.2Boot-up.....................173.2.1BootInitialization.................173.2.2ApplicationLoading................173.2.2.1ExecutingtheROM-BasedApplication..........183.3OperatingModes..................183.3.1Overview....................183.3.2ContextTables..................193.3.3Active.....................203.3.3.1AdvancedNoiseReduction.............213.3.3.2Equalizer..................223.3.3.3SignalStatistics................233.3.3.4EnteringandExitingActiveMode...........243.3.4Bypass....................243.3.4.1SignalStatistics................253.3.4.2DiagnosticOutput................253.3.4.3EnteringandExitingBypassMode...........253.3.5DeepSleep...................263.3.5.1EnteringandExitingDeepSleepMode..........263.3.6Standby....................263.3.6.1EnteringandExitingStandbyMode...........273.4LSAD-BasedSystemConfiguration..........273.5AlgorithmConfiguration..........