MS6821

MS6821 MOSA | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 26

Technical content

4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C

4 Stereo Inputs, 2W BTL Stereo Output

16-bit Stereo DAC and Volume Control

FEATURES

• OperationArange:A2.4V~5.5VA
• VolumeAcontrolArangeAA Gain:A0AtoA21dB,A3dB/stepA Attenuation:A0AtoA–77.5dB,A1.25dB/stepA
• 4AstereoAinputsA(mixedAwithAanAaudioADAC)A
• OutputAmodeA:ASpeaker(ABTL)/Headphone(SE)A
• BTLAOutputApower,ATHD+N=1%,AStereoAInputA AAR L=4Ω,A2WAatA5V,A0.8WAatA3.3V,A360mWAatA2.4VA RL=8Ω,A1.3WAatA5V,A0.53WAatA3.3V,A250mWAatA2.4VA
• BTLAOutputApower,ADACAInputA AAR L=4Ω,A1.6WAatA5V,A0.70WAatA3.3V,A340mWAatA2.4VA RL=8Ω,A0.83WAatA5V,A0.35WAatA3.3V,A170mWAatA2.4VA A
• BuiltLinA16LbitAAudioADACA
• AudioAformatA:AI2S,ARightAjustified,ALeftAjustifiedA
• ControlAinterfaceA:AI2CA
• ExcellentAPowerASupplyARejectionARatio(PSRR)A
• FlexibilityApowerAmanagementA
• ComponentAlessA
• ReduceApopAnoiseAcircuitA
• HousedAinATSSOP28Apackage,AenhancedAthermalA PADA A A

APPLICATIONS

MultimediaAsystem,APortableADigitalAAudio.A A

DESCRIPTION

TheAMS6821AisAaA16LbitsAvoltageLoutputADigitalLtoLAnalogAConverterA(DAC)AintegratedAclassAABAstereoAheadphoneA driverAandAstereoAspeakerApowerAamplifier.AItAcanAdriveA2WAofAcontinuousAaverageApowerAintoAaAdualA4ΩAbridgedLtiedA (BTL)AspeakerAorA2A*A90mWAintoAstereoA32ΩAsingleAendedA(SE)Aheadphone.ATheA16LbitADACAsupportsAgeneralAandA popularAformatsAasAI2S,ARightAjustified.ATheAvolumeAcontrolAoffersAwideArangeAofAgainAandAattenuationAforA4LsetAstereoA input.AAllAofAtheAfunctionsAareAsetAbyAI2CAinterface.AA A TheAMS6821AhasAgoodAfeatureAforAportableAequipment,AincludingAwideAvoltageAoperationA2.4V~5.5V,AlowApowerA consumption,AflexibleApowerAmanagement,AcomponentAlessAandAsmallApackageATSSOP28,AmakeAtheAMS6821AideallyA suitableAforAuseAinAtheAportableAdigitalAaudioAequipments.A A A BLOCK DIAGRAM RIN2 RIN1 Attenuation Mute LIN1 LIN2 LIN3 RIN3 LfchCselector &CGain LIN4 RIN4 BCK WS DATA OUTR+ OUTRf OUTL+ OUTLf 16fbitCDAC Mixer Attenuation Mute Mixer CAP VDD Vss SCL SDA I2C Interface DACLC/ LINE_INL DACRC/ LINE_INR Supply PowerCAmplifier Supply PV DDR PV SSR PV DDL PV SSL RfchCselector &CGain A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC2CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C PIN CONFIGURATION A A Note:A1.ASE:ASingleAEnded.AABTL:ABridgedLTiedALoadAA A Symbol A Pin A Description WSA 1A AudioAwordAselectAinputA BCKA 2A AudioAbitAclockAinputA CAPA 3A CapacitorAconnectedA RIN1A 4A RightAchannelAinputA1A RIN2A 5A RightAchannelAinputA2A RIN3A 6A RightAchannelAinputA3A RIN4A 7A RightAchannelAinputA4A VSS A 8A NegativeAsupplyAvoltageA PV DDR A 9A PositiveAsupplyAvoltageAforArightA channelAofApowerAamplifierA OUTRLA 10A SEArightAchannelAoutputAorAnegativeA outputAofABTLArightAchannelA OUTR+A 11A PositiveAoutputAofABTLArightAchannelA GNDA 12A ConnectedAtoAgroundA PV SSR A 13A NegativeAsupplyAvoltageAforArightA channelAofApowerAamplifierA DACRA LINE_INR A 14A DACArightAchannelAoutputA LINE_INArightAchannelAinputA DACLA LINE_INL A 15A DACALeftAchannelAoutputA LINE_INAleftAchannelAinputA PV SSL A 16A NegativeAsupplyAvoltageAforAleftAchannelA ofApowerAamplifierA GNDA 17A ConnectedAtoAgroundA OUTL+A 18A PositiveAoutputAofABTLAleftAchannelA OUTLLA 19A SEAleftAchannelAoutputAorAnegativeA outputAofABTLAleftAchannelA PV DDL A 20A PositiveAsupplyAvoltageAforAleftAchannelA ofApowerAamplifierA VDD A 21A PositiveAsupplyAvoltageA LIN4A 22A LeftAchannelAinputA4A LIN3A 23A LeftAchannelAinputA3A LIN2A 24A LeftAchannelAinputA2A LIN1A 25A LeftAchannelAinputA1A SDAA 26A I 2CAdataAinputA SCLA 27A I 2CAclockAinputA DATAA 28A AudioAdataAinputA

1 DATA

10 OUTRf OUTLf

14 DACR

15 DACL

A MS6821, TSSOP28 A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC3CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C ORDERING INFORMATION A Package Part number Packaging Marking Transport Media 28PinATSSOPA(leadAfree)A MS6821TGTRA MS6821GA 3kAUnits ATapeAandAReel 28PinATSSOPA(leadAfree)A MS6821TGUA MS6821GA 50AUnitsA Tube ARoHSAComplianceA ABSOLUTE MAXIMUM RATINGS Symbol A Parameter Rating Unit VDD A SupplyAvoltageA 6A VA VESD A ElectrostaticAhandlingA 2000A VA TSTG A StorageAtemperatureArangeA L65AtoA150A ℃A TAA OperatingAambientAtemperatureArangeA L40AtoA85A ℃A TJA MaximumAjunctionAtemperatureA 150A ℃A TSA SolderingAtemperature,A10AsecondsA 260A ℃A RTHJA A ThermalAresistanceAfromAjunctionAtoAambientAinAfreeAairA TSSOP28A(enhanceAthermalApad)A A 51A ℃/WA A A OPERATING RATINGS Symbol Parameter Min Typ Max Unit VDD A SupplyAvoltageA 2.4A 5A 5.5A VA A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC4CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C 5V ELECTRICAL CHARACTERISTICS (Ta=25 ℃,AVDD =5V,AV SS =0V,Af=1kHz;AunlessAotherwiseAspecified)A Symbol Parameter Conditions Min Typ Max Unit DC Characteristics VCAP A VoltageAatACAPA A 0.5VDD A L0.05A 0.5VDD A 0.5VDD A +0.05A VA VDC A OutputADCAlevelA A 0.5VDD A L0.05A 0.5VDD A 0.5VDD A +0.05A VA AllAdevicesAareAactive,ABTLAA LA 13.0A LA AllAdevicesAareAactive,ASEA LA 9.8A LA DACAPD,ABTLA LA 9.9A LA DACAPD,ASEA LA 6.7A LA LLchA(RLch)APD,ABTLA DACAactiveA LA 8.2A LA LLchA(RLch)APD,ASEA DACAactiveA LA 6.6A LA IQA QuiescentAcurrentA OnlyADACAisAactiveA LA 3.2A LA mAA AllAdevicesApowerAdownA LA LA 0.3A IPD A PowerAdownAcurrentA AllAdevicesApowerAdown,A exceptACAP=1/2AVDDA A 12A A uAA ATTA MuteAattenuationA A A A L90A dBA GainA 0A LA 21A dBAGA RAN A Gain/AttenuationArangeA AttenuationA L77.5A A 0A dBA GSTEP A GainAstepA A LA 3A LA dBA ASTEP A AttenuationAstepA A LA 1.25A LA dBA EGA A Gain/AttenuationAstepAerrorA A LA 0.3A LA dBA VI2CH A SerialAinterfaceAhighAinputAlevelA A 2A A A VA VI2CL A SerialAinterfaceAlowAinputAlevelA A A A 0.8A VA AC Characteristics (Stereo input) A BTLAModeA,AR L=8 ΩA CAP=1uF,Af=200HzA LA 61A LA dBA PSRRA PowerAsupplyArejectionAratioA SEAModeA,AR L=32 ΩA CAP=1uF,Af=200HzA LA 65A LA dBA BTLAMode,AR L=8 ΩA Po=1WA LA 78A LA dBA CSA ChannelAseparationA SEAMode,AR L=32 ΩA Po=60mWA LA 81A LA dBA LA L65A LA dBATHD+N ATotalAharmonicAdistortionAplusA NoiseA SEAmode,ARL=32 Ω,A60mW A LA 0.0562 A LA %A S/NA SignalLtoLnoiseAratioA SEAmode,AALweighting,A 75mWA LA 93A LA dBA BTLAMode,AR LA=A4 ΩA THD+NA=A1%A LA 2A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A1%A LA 1.3A LA WAPoA MaximumAoutputApowerA SEAMode,AR LA=A32 ΩA THD+NA=A0.1%A LA 93mA LA WA PD:APowerADown

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC5CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Symbol Parameter Conditions Min Typ Max Unit Audio DAC Characteristics A(samplingArate=4fs,Afs=A44.1kHz,Af=1kHz) ResA ResolutionA A LA LA 16A bitsA VFSDAC A FullAscaleAoutputAvoltageAofADAC A VFS =0.72 A*AV DD A V FS L1.5% A VFS A VFS +1.5% A VA CAP=1uFA(200Hz)A A 66A LAPSRRA PowerAsupplyArejectionAratioA CAP=10uFA(200Hz)A A 67A LA dBA CSA ChannelAseparationA A A 88A A dBA LA L67A L62A dBATHD+N ATotalAharmonicAdistortionAplusA noiseA DACAoutput,AR L=1k Ω,CVFS A LA 0.0447 A 0.079A %A S/NA SignalLtoLnoiseAratioA DACAoutput,ARL=1k Ω,CVFS A ALweightingA 86A 90A LA dBA BTLAMode,AR LA=A4 ΩA THD+NA=A0.33%A 1.44A 1.6A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A0.15A%A 0.75A 0.83A LA WADACPo A MaximumAoutputApowerA usingADACA SEAMode,AR LA=A32 ΩA THD+NA=A0.042%A 41.4m A 46mA LA WA A 3.3V ELECTRICAL CHARACTERISTICS (Ta=25 ℃,AVDD =3.3V,AV SS =0V,Af=1kHz;AunlessAotherwiseAspecified)A Symbol Parameter Conditions Min Typ Max Unit DC Characteristics AllAdevicesAareAactive,ABTLAA LA 11.5A LA AllAdevicesAareAactive,ASEA LA 8.5A LA DACAPD,ABTLA LA 9A LA DACAPD,ASEA LA 6A LA LLchA(RLch)APD,ABTLA DACAactiveA LA 7.1A LA LLchA(RLch)APD,ASEA DACAactiveA LA 5.6A LA IQA QuiescentAcurrentA OnlyADACAisAactiveA LA 2.6A LA mAA AC Characteristics (Stereo input) A LA L67A 60A dBATHD+N ATotalAharmonicAdistortionAplusA NoiseA SEAmode,ARL=32 Ω,A35mW A LA 0.0447 A 0.1A %A BTLAMode,AR LA=A4 ΩA THD+NA=A1%A LA 0.8A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A1%A LA 0.53A LA WAPoA MaximumAoutputApowerA SEAMode,AR LA=A32 ΩA THD+NA=A0.1%A LA 35mA LA WA Audio DAC Characteristics (samplingArate=4fs,Afs=A44.1kHz,Af=1kHz)A LA L66A 60A dBATHD+N ATotalAharmonicAdistortionAplusA noiseA DACAoutput,AR L=1k Ω,CVFS A LA 0.05A 0.1A %A BTLAMode,AR LA=A4 ΩA THD+NA=A0.25%A 0.63A 0.70A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A0.14A%A 0.32A 0.35A LA WADACPo A MaximumAoutputApowerA usingADACA SEAMode,AR LA=A32 ΩA THD+NA=A0.052%A 18mA 20mA LA WA

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC6CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C 2.4V ELECTRICAL CHARACTERISTICS (Ta=25 ℃,AVDD =2.4V,AV SS =0V,Af=1kHz;AunlessAotherwiseAspecified)A Symbol Parameter Conditions Min Typ Max Unit DC Characteristics AllAdevicesAareAactive,ABTLAA LA 9.9A LA AllAdevicesAareAactive,ASEA LA 7.1A LA DACAPD,ABTLA LA 7.8A LA DACAPD,ASEA LA 5.1A LA LLchA(RLch)APD,ABTLA DACAactiveA LA 6A LA LLchA(RLch)APD,ASEA DACAactiveA LA 4.7A LA IQA QuiescentAcurrentA OnlyADACAisAactiveA LA 2.2A LA mAA AC Characteristics (Stereo input) A LA L65A L60A dBATHD+N ATotalAharmonicAdistortionAplusA NoiseA SEAmode,ARL=32 Ω,A15mW A LA 0.0562 A 0.1A %A BTLAMode,AR LA=A4 ΩA THD+NA=A1%A LA 0.36A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A1%A LA 0.25A LA WAPoA MaximumAoutputApowerA SEAMode,AR LA=A32 ΩA THD+NA=A0.1%A LA 15mA LA WA Audio DAC Characteristics (samplingArate=4fs,Afs=A44.1kHz,Af=1kHz)A LA L63A L58A dBATHD+N ATotalAharmonicAdistortionAplusA noiseA DACAoutput,AR L=1k Ω,CVFS A LA 0.071A 0.126A %A BTLAMode,AR LA=A4 ΩA THD+NA=A0.85%A 0.31A 0.34A LA WA BTLAMode,AR LA=A8 ΩA THD+NA=A0.17A%A 0.15A 0.17A LA WADACPo A MaximumAoutputApowerA usingADACA SEAMode,AR LA=A32 ΩA THD+NA=A0.07%A 9mA 10mA LA WA

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC7CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25 ℃;AunlessAotherwiseAspecified) QUIESCENTCCURRENTC(mA)C C SUPPLYCVOLTAGEC(V)C QUIESCENTCCURRENTC(mA)C C SUPPLYCVOLTAGEC(V) QUIESCENTCCURRENTC(mA)C SUPPLYCVOLTAGEC(V) A Quiescent current vs. supply voltage A Quiescent current vs. supply voltage A Quiescent current vs. supply voltage QUIESCENTCCURRENTC(mA)C C SUPPLYCVOLTAGEC(V)C C C A Quiescent current vs. supply voltage A A SE C BTL C LPDCorCRPDC DACCactivates.C AllCDevicesCactivate.C AllCDevicesCactivateCexceptCDAC C DACCactivatesConly C BTL C BTL C SE C SE C

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC8CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Stereo inputs signal (Ta=25 ℃,AstereoAinputsAsignal,Af=1kHz,ADACAisAPowerADownAmode;AunlessAotherwiseAspecified) A THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C A THD+N vs. frequency A THD+N vs. frequency A THD+N vs. frequency A A A A THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C A THD+N vs. frequency A THD+N vs. frequency A THD+N vs. frequency A THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz)C A THD+N vs. frequency A THD+N vs. frequency A THD+N vs. frequency A A VDD =5V,CPo=1.2W C BTLCmode,CR L=8ΩC VDD =3.3V,CPo=0.53W BTLCmode,CR L=8ΩC VDD =2.4V,CPo=250mW C BTLCmode,CR L=8ΩC VDD =5V,CPo=90mW C SECmode,CR L=32ΩC VDD =3.3V,CPo=35mW SECmode,CR L=32ΩC VDD =2.4,CPo=15mW C SECmode,CR L=32ΩC VDD =5V,CPo=2WC BTLCmode,CR L=4ΩC VDD =3.3V,CPo=0.8W C BTLCmode,CR L=4ΩC VDD =2.4V,CPo=330mW C BTLCmode,CR L=4ΩC

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC9CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+N vs. output power A THD+N vs. output power A THD+N vs. output power A THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+N vs. output power A THD+N vs. output power A THD+N vs. output power THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+NC(%)C C OUTPUTCPOWERC(W)C THD+N vs. output power A THD+N vs. output power A THD+N vs. output power f=1kHz C VDD =2.4V C BTLCmode C RL=8ΩC f=20HzC f=20kHzC f=1kHz C VDD =3.3V C BTLCmode C RL=8ΩC f=20HzC f=20kHzC f=1kHz C VDD =5VC BTLCmode C RL=8ΩC f=20Hz C f=20kHz C f=1kHz C VDD =2.4V C SECmode C RL=32ΩC f=20Hz C f=20kHz C f=1kHz C VDD =3.3V C SECmode C RL=32ΩC f=20Hz C f=20kHz f=1kHz C VDD =5VC SECmode C RL=32ΩC f=20Hz C f=1kHz C VDD =2.4V C BTLCmode C RL=4ΩC f=20Hz C f=20kHz C f=1kHz C VDD =3.3V C BTLCmode C RL=4ΩC f=20Hz C f=20kHzC f=1kHz C VDD =5VC BTLCmode C RL=4ΩC f=20Hz C f=20kHzC f=20kHz

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC10 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C CHANNELCSEPARATIONC(dB)C C FREQUENCYC(Hz) CHANNELCSEPARATIONC(dB)C FREQUENCYC(Hz) C A Channel separation vs. frequency A Channel separation vs. frequency A PSRRC(dB)C C FREQUENCYC(Hz)C PSRRC(dB)C C FREQUENCYC(Hz)C C A PSRR vs. frequency A PSRR vs. frequency A A A A A A A A A A A A A A A A A A A A A A A A CAP=1uF C CAP=10uF C VDD =5V,C VRR =200mVrms,C BTLCR L=8ΩC CAP=1uF C CAP=10uF C VDD =5V,C VRR =200mVrms,C SECR L=32ΩC VDD =5V,CPo=1WCC BTL,CR L=8ΩC VDD =5V,CPo=60mWCC SE,CR L=32ΩC

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC11 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C DAC inputs signal (Ta=25 ℃,AsamplingArate=4fs,Afs=A44.1kHz,Af=1kHz,APAAisAPowerADownAmode;AunlessAotherwiseAspecified) THD+NC(%)C C FREQUENCYC(Hz)C THD+NC(%)C C FREQUENCYC(Hz) THD+NC(%)C C FREQUENCYC(Hz) A THD+N vs. frequency A THD+N vs. frequency A THD+N vs. frequency CHANNELCSEPARATIONC(dB)C C SUPPLYCVOLTAGEC(V) PSRRC(dB)C C FREQUENCYC(Hz)C C C A Channel separation vs. supply voltage A PSRR vs. frequency A VDD =2.4V,CV FS C DACCV FS C VDD =5VC DACCV FSC C VDD =3.3V,CV FSC DACCV FS C VDD =5VC DACCV FS C CAP=1uF C CAP=10uF C VDD =5VC VRR =0.2Vrms C .22dBV C

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC12 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C AUDIO TIMING AND FORMAT TheAMS6821AacceptsAinputAserialAdataAformatsAofA16LbitAwordAlength.ALeftAandArightAdataAwordsAareAtimeAmultiplexed.A TheAMSBAmustAalwaysAbeAfirst.AA A RIGHT WS BCK DATA LSB MSB tr tHB tf tcr tLB tHW tSW LEFT tSD tHD A A Audio data format (BCK, WS, DATA) Symbol Parameter Conditions Min Typ Max Unit VIL A InputALOWAlevelA A 2A LA LA VA VIH A InputAHIGHAlevelA A LA LA 0.8A VA fABCK A InputAClockAFrequencyA A LA LA 18.4A MHzA BRA BitARateADataAInputA A LA LA 18.4A Mbits/s A fWS A WordASelectAInputA A LA LA 384A kHzA tArA RiseATimeA A LA LA 12A nsA tAfA FallATimeA A LA LA 12A nsA tACrA BitAClockACycleATimeA A 54A LA LA nsA tAHB A BitAClockAHighATimeA A 15A LA LA nsA tALB A BitAClockALowATimeA A 15A LA LA nsA tASD A DataASetLupATimeA A 12A LA LA nsA tAHD A DataAHoldATimeAtoABitAClockA A 2A LA LA nsA tAHW A WordASelectAHoldATimeA A 2A LA LA nsA tASW A WordASelectASetLupATimeA A 12A LA LA nsA

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC13 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Right justified format 012 15 14 13 2 1 0 MSB LSB 15 14 13 2 1 0 MSB LSB RIGHT LEFTWS BCK DATA A Left justified format 15 14 13 2 1 0 MSB LSB 15 14 13 2 1 0 MSB LSB RIGHT LEFT WS BCK DATA 15 MSB A I2S format 15 14 13 2 1 0 MSB LSB RIGHT LEFT WS BCK DATA

1 BCK 1 BCK

A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC14 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C I2 C CONTROL INTERFACE DataAareAtransmittedAtoAandAfromAtheAMCUAtoAtheAMS6821AviaAtheASDAAandASCL.ATheASDAAandASCLAmakeAupAtheA BUSAinterface.AItAshouldAbeAnotedAthatApullLupAresistorsAmustAbeAconnectedAtoAtheApositiveAsupplyAvoltage.A SDAC(SerialCDataCLine) Rp Rp SCLC(SerialCClockCLine) PullCupCresistors VDD MCU MS6821 I

2 C interface protocol

TheAformatAconsistsAofAtheAfollowing:A

• AASTARTAconditionA
• AAchipAaddressAbyteAincludingAtheAchipAaddress.A(7bits)A
• TheA8 th AbitAofAtheAbyteAmustAbeA“0”.(write=0,Aread=1)A
• TheAchipAmustAalwaysAacknowledgeAtheAendAofAeachAtransmittedAbyte.A
• AAdataAsequenceA(NLbytesA+AAcknowledge)A
• AASTOPAconditionA A SCL SDA 1f7 8 9 1f7 8 9 981f7 S P ADDRESS R/W ACK ACK ACK DATA DATA START CONDITION STOP CONDITION A A A A A A I

2 C chip address

A A A A A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC15 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C I2 C data bytes description MSB A A A A A A LSB A Function A 0A 0A B2A B1A B0A A2A A1A A0A LLch,AAttenuationAandAMuteA 0A 1A B2A B1A B0A A2A A1A A0A RLch,AAttenuationAandAMuteA 1A 0A 0A G2A G1A G0A S1A S0A LLch,AInputAGainAandAlineASele ctionA 1A 0A 1A G2A G1A G0A S1A S0A RLch,AInputAGainAandAlineASele ctionA 1A 1A 0A DACA PDA RPDA LPDA PDPR A CAPA PDA PowerADownAModeA 1A 1A 1A S/BA MixLA MixRA AF1A AF0A OutputAmodeA(SE/BTL),AMixerAcontrolA andAAudioAformatA WhereAAxA=A1.25dB/step;ABxA=A10dB/step;AGxA=A3dB/stepA A Attenuation and Mute MSB A A A LSB Function 0A 0A LLch,AAttenuationAandAMute 0A 1A B2 B1 B0 A2 A1 A0 RLch,AAttenuationAandAMute A A A A A 0A 0A 0A 0AdBA A A A A A 0A 0A 1A L1.25AdBA A A A A A 0A 1A 0A L2.5AdBA A A A A A 0A 1A 1A L3.75AdBA A A A A A 1A 0A 0A L5AdBA A A A A A 1A 0A 1A L6.25AdBA A A A A A 1A 1A 0A L7.5AdBA A A A A A 1A 1A 1A L8.75AdBA A A 0A 0A 0A A A A 0AdBA A A 0A 0A 1A A A A L10AdBA A A 0A 1A 0A A A A L20AdBA A A 0A 1A 1A A A A L30AdBA A A 1A 0A 0A A A A L40AdBA A A 1A 0A 1A A A A L50AdBA A A 1A 1A 0A A A A L60AdBA A A 1A 1A 1A A A A L70AdB A A 1A 1A 1A 1A 1A 1A MuteA InitialAstate:ABothALLchAandARLchAareAmuteLon.

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC16 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Input Selector and Input Gain MSB A A A LSB Function 1A 0A 0A LLch,AInputAGainAandAlineASelectionA 1A 0A 1A G2 G1 G0 S1 S0 RLch,AInputAGainAandAlineASelectionA A A A A A A 0A 0A LineA1A(LLchAorARLch)A A A A A A A 0A 1A LineA2A(LLchAorARLch)A A A A A A A 1A 0A LineA3A(LLchAorARLch)A A A A A A A 1A 1A LineA4A(LLchAorARLch)A A A A 0A 0A 0A A A 0AdBA A A A 0A 0A 1A A A 3AdBA A A A 0A 1A 0A A A 6AdBA A A A 0A 1A 1A A A 9AdBA A A A 1A 0A 0A A A 12AdBA A A A 1A 0A 1A A A 15AdBA A A A 1A 1A 0A A A 18AdBA A A A 1A 1A 1A A A 21AdBA InitialAstate:ALLch1,ARLch1,AInputAgainAisA0dB.A Power Down Mode MSB A A A LSB Function 1A 1A 0A DAC PD RPD LPD PDPR CAP PD PowerAmodeAselectionAandApowerAmanagementA A A A 0A A A A A DACAisAactiveAmodeA A A A 1A A A A A DACAisApowerAdownAmodeA A A A A 0A A A A RLchAPAAoutputAisAactiveAmodeA A A A A 1A A A A RLchAPAAoutputAisApowerAdownAmodeA A A A A A 0A A A LLchAPAAoutputAisAactiveAmodeA A A A A A 1A A A LLchAPAAoutputAisApowerAdownAmodeA A A A A A A 0A A DisableApreparationAforApowerAoffA A A A A A A 1A A EnableApreparationAforApowerAoffA A A A A A A A 0A SetAtheAvoltageAofACAPAtoAmiddleAofAsupply AvoltageA A A A A A A A 1A PullAdownACAPApinAtoAgroundA InitialAstate:AAllAareAtheApowerAdownAmodes.A EnableAtheApowerAdownApreparationAbeforeAtheAchipAwillAbeAshutAdown. A Attenuation Mute 16fbitCDAC Mixer Attenuation Mute Mixer DACPD LPD RPD LfchCselector &CGain RfchCselector &CGain A A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC17CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Output mode (SE/BTL), Mixer control and Audio format MSB A A A LSB Function 1A 1A 1A S/B MixL MixR AF1 AF0 OutputAmode,AmixerAcontrolAandAaudioAformatA A A A 0A A A A A OutputAmodeAisABTLA A A A 1A A A A A OutputAmodeAisASEA A A A A 0A A A A LLchAofAinputAselectorAisAtheAonlyAsignalA A A A A 1A A A A MixALLchAofAinputAselectorAandALLchAofADAC A A A A A A 0A A A RLchAofAinputAselectorAisAtheAonlyAsignalA A A A A A 1A A A MixARLchAofAinputAselectorAandARLchAofADAC A A A A A A A 0A 0A RightAjustifiedAformatA A A A A A A 1A 0A LeftAjustifiedAformatA A A A A A A 0A 1A A A A A A A 1A 1A I2SAformatA InitialAstate:AOutputAmodeAisABTLAmode,AunmixedAmodeAandARightAjustifiedAformatA A A A A I

2 C Initial code and status

MSB A A A A A A LSB A Function A Initial status 0A 0A 1 1 1 1 1 1 LLch,AAttenuationAandAMuteA MuteAOnA 0A 1A 1 1 1 1 1 1 RLch,AAttenuationAandAMuteA MuteAOnA 1A 0A 0A 0 0 0 0 0 LLch,AInputAGainAandAlineASelectionA Line1,A0dBA 1A 0A 1A 0 0 0 0 0 RLch,AInputAGainAandAlineASelectionA Line1,A0dBA 1A 1A 0A 1 1 1 1 1 PowerADownAModeA AllAdevicesA AApowerAdownA 1A 1A 1A 0 0 0 0 0 OutputAmodeA(SE/BTL),AMixerAcontrolA andAAudioAformatA BTL,AUnmixed,A A RightAjustifiedA A A A A A A A A A A A A A A A A A A A A A A A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC18 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C I2 C CODE EXAMPLE Input selector and input gain A SetAleftAchannelAtoAbeAlineL4AandAinputAgainAtoAbeA3dB.ASetArightAchannelAtoAbeAlineL4AandAinputAgainAtoAbeA3dB.A ACK Start MS6821CAddress ACK 1 0 0 0 1 10 1 LfchC=CLine4,CGC=C3dB ACK RfchC=CLine4,CGC=C3dB 1 0 1 0 1 10 1 Stop Gain Line TheAleftAandArightAinputAchannelAareAindependent.A A A A Volume control A SetAleftAchannelAtoAbeAL15dBAandArightAchannelAtoAbeA30dB.A ACK Start MS6821CAddress ACK 1 0 0 0 1 10 1 LfchC=CLine4,CGC=C3dB ACK RfchC=CLine4,CGC=C3dB 1 0 1 0 1 10 1 Stop Gain Line A A A Power down mode SetAbuiltLinADACAtoAbeApowerAdownAmode. ACK Start MS6821CAddress ACK 1 1 0 1 0 0 0 0 DACCpowerCdown Stop DACPD Output mode, mixer control and audio format A SetAoutputAmodeAtoAbeASEAmode,AaudioAformatAisAI2S,AandAbothAinputAchannelAtoAbeAmixed.A A ACK Start MS6821CAddress ACK 1 1 1 1 0 11 1 SECmode,CAllCmix,CI2S Stop OutputCmode AudioCformatMixer A A xA A A A A A A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC19 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C OPERATION PROCEDURE TheAsequenceAofAoperation:ApowerAon→AactivatingA→ApowerAdownA→AactivatingA→ApowerAoff.ATheAbasicAflowchartsAareA asAfollows:A A ForAHPAmodeAandAHP/BTLAmodeA A Volume Down To Mute Input Channels Mute On [CAttenuationCandCMuteC] CCCode:CLch 00111111 (3Fh) Rch 01111111 (7Fh) Power Off CCDisconnectCV DD CCV DD CwillCbeCfellCdownCtoCC0V Power Off Power On Power On CCV DD =CSupplyCvoltage Activating Power Down (Shut Down ) Power Down Preparation [CPowerCDownCModeC] CCCode:C11000010 (C2h) [CInput4&CGainC=C0dB] CCCode:CLch 10000011(83h) Rch 10100011(a3h) CCwaitC7sec Power Down All The Devices Pull Down CAP Pin To Ground [CPowerCDownCModeC] CCCode:C11011111 (DFh)Keep All The Digital Interface Signals Unchanged Disable Power Down [CPowerCDownCModeC] CCCode:C11000010 (C2h) CWaitC0.5sec Setting Input Gain Is Fixed [CEnableCInputC&CInputCGainC] CCCode:CLch 100xxx00 Rch 101xxx00 Power Down All The Devices Only CAPPD Keep Activating [CPowerCDownCModeC] CCCode:C11011110 (DEh) Volume Down To Mute Input Channels Mute On [CAttenuationCandCMuteC] CCCode:CLch 00111111 (3Fh) Rch 01111111 (7Fh) PDPR = 0 [CPowerCDownCModeC] CCCode:C11000000 (C0h) CWaitC0.5Csec Mute Off And Volume Up /Down Step By Step [CAttenuationCandCMuteC] CCCode:CLch 00xxxxxx Rch 01xxxxxx Power Down Preparation [CPowerCDownCModeC] CCCode:C11000010 (C2h) [CInput4 &CGainC=C0dB] CCCode:CLch 10000011(83h) Rch 10100011(a3h) CCwaitC7sec Default Status [AttenuationC&CMute] MuteConC(maxCattenuation) [CInputCSelectorC&CInputCGainC]C CCLfch1,CRfch1 0dB [CPowerCDownCModeC] CCAllCpowerCdownCstatus [COutputCModeC&CMixerC&CFormatC] CCBTLCmode CCInputsCnotCmixedCwithCDACCsignal RJFCformat All the Digital Interface Signals Pull Low CCI2CCpullClow CCAudioCinputsCpullClow CC(BCK,CWS,CDATA) CCV DD =CGND All the Digital Interface Signals Pull Low CCI2CCpullClow CCAudioCinputsCpullClow CC(BCK,CWS,CDATA) A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC20 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C ForABTLAmodeAonly Volume Down To Mute Input Channels Mute On [CAttenuationCandCMuteC] CCCode:CLch 00111111 (3Fh) Rch 01111111 (7Fh) Power Off CCDisconnectCV DD CCV DD CwillCbeCfellCdownCtoCC0V Power Off Power On Power On CCV DD =CSupplyCvoltage Activating Power Down (Shut Down ) Power Down All The Devices [CPowerCDownCModeC] CCCode:C11011111 (DFh)Keep All The Digital Interface Signals Unchanged Disable Power Down [CPowerCDownCModeC] CCCode:C11000000 (C0h) CWaitC0.5sec Setting Input Gain Is Fixed [CInputCGainC] CCCode:CLch 100xxx00 Rch 101xxx00 Power Down All The Devices [CPowerCDownCModeC] CCCode:C11011111 (DFh) Volume Down To Mute Input Channels Mute On [CAttenuationCandCMuteC] CCCode:CLch 00111111 (3Fh) Rch 01111111 (7Fh) Mute Off And Volume Up /Down Step By Step [CAttenuationCandCMuteC] CCCode:CLch 00xxxxxx Rch 01xxxxxx Pull Down CAP Pin To Ground [CPowerCDownCModeC] CCCode:C11000001 (C1h) WaitC0.1sec Default Status [AttenuationC&CMute] MuteConC(maxCattenuation) [CInputCSelectorC&CInputCGainC]C CCLfch1,CRfch1 0dB [CPowerCDownCModeC] CCAllCpowerCdownCstatus [COutputCModeC&CMixerC&CFormatC] CCBTLCmode CCInputsCnotCmixedCwithCDACCsignal RJFCformat All the Digital Interface Signals Pull Low CCI2CCpullClow CCAudioCinputsCpullClow CC(BCK,CWS,CDATA) CCV DD =CGND Pull Down CAP Pin To Ground [CPowerCDownCModeC] CCCode:C11000001 (C1h) WaitC0.1sec All the Digital Interface Signals Pull Low CCI2CCpullClow CCAudioCinputsCpullClow CC(BCK,CWS,CDATA) A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC21 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C

APPLICATION INFORMATION

A base application circuit PV SSR VDD VSS PV DDL PV DDR BCK WS DATA SDA SCL 2.4~5.5V PowerCAmplifierCSupply 1uF PV SSL 1uF 0.1uF MS6821 Audio Decoder MCU 4.7uF CAP 2.4~5.5V Supply 1uF LIN1 LIN2 LIN3 LIN4 22 RIN1 RIN2 RIN3 RIN4 7 LCchannel RCchannel 10uF 10uF OUTLf OUTL+ 100uF 1k RL OUTRf OUTR+ 100uF 1k RL DACL DACR HeadphoneCJack 10uF 10uF 100k VDD MCU HP_sense 100k 1uF A A A A Using LINE_IN function -- Built-in DAC power down ThereAareAtwoAfunctionsAatApin14AandApin15,AoneAisAbuiltLinADACAoutputAchannel,AandAtheAotherAisALINE_IN.A TheADACAmustAbeApowerAdownAifAtheAtwoApinsAareAoperatedAinALINE_INAfunction.A A RIN2 RIN1 Attenuation Mute LIN1 LIN2 LIN3 RIN3 LIN4 RIN4 16fbitCDAC Mixer Attenuation Mute Mixer LINE_INL LINE_INR Power Down 14 15 AudioCsignal LfchCselector &CGain RfchCselector &CGain A A A A A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC22 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Output mode operation -- SE mode and BTL mode TheAoutputAmodeAhasAtwoAmodes,ASEAmodeAandABTLAmode.ATheAmodeAisAselectedAbyAI2CAcodeAviaAaAMCU.A InABTLAmode,AtheAoutputsAofAA1(B1)AandAA2(B2)AareAthenAusedAtoAdriveAtheAbridgedLtiedAloadA A OUTR+ OUTRf OUTL+ OUTLf SCL SDA I2C Interface RL 4ΩC/C8 Ω RL 4ΩC/C8 Ω A InAtheASEAmode,AtheAamplifiersAA2AandAB2AareAshutdown,AandAthenAtheAamplifiersAwillAbeAaAhighAoutputAimpedanceAstate.A A A A OUTRf OUTLf SCL SDA I2C Interface RL 16ΩC/C32Ω 100uF Headphone Jack Shutdown Shutdown 100uF A A A A Headphone sense TheAoutputAmodeAisASEAorABTLAthatAisAdecidedAbyAaAheadphone.AItAhasAtoAbeAsetASEAmodeAwhenAaAheadphoneAisAplugLinA status.ATheAoutputAmodeAisAselectedAbyAI2CAcommandAcodeAbyAaAMCU.APleaseAnoteAthatAtheAMS6821Adon’tAdetectAaA headphoneAautomatically.AThusAaAdetectAfunctionAisAexecutedAviaAaAMCU.AAnAoperationAdiagramAisAasAfollows:A A OUTLf OUTL+ 100uF 1k RL OUTRf OUTR+ 100uF 1k RL SCL SDA HeadphoneCJack MCU MS6821 100k VDD HP_sense 100k 1uF A A TheAHP_senseApinAisAhighAwhenAaAheadphoneAisAplugLin.A TheAHP_senseApinAisAlowAwhenAaAheadphoneAisAnotAplugLin.A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC23 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C EXTERNAL DIMENSIONS A TSSOP28 (Thermal Pad) E D C Detail A L θθ θθ A B e y A A A A A A A A A A A A A A A A DimensionCinCmmC DimensionCinCinchesC SymbolC MinC Nom C Max C MinC Nom C MaxC AC fC fC 1.15C fC fC 0.045 C A1C 0.00C fC 0.10C 0.000 C fC 0.004 C bC 0.19C fC 0.30C 0.007 C fC 0.012 C CC 0.09C fC 0.20C 0.004 C fC 0.008 C eC fC 0.65C fC fC 0.026 C fC θC 0 oC fC 8 oC 0 oC fC 8 oC yC fC fC 0.10C fC fC 0.004 C C

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC24 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C DEMO BOARD A A A A A A A A A A A A A A A A A A A A Function description A LabelA1:ASupplyAInputA SupplyAvoltageArangeAisA2.4VAtoA5.5V.A A LabelA2:AHeadphoneAJackA UsedA3.5mmAdiameterAofAheadphoneAwithA32ohmA A LabelA3:ADACAoutputA ConnectedAtoAaApostLpowerLamplifier,AasAactiveAspeaker.A InAaddition,AusingAvolumeAcontrolAforADAC,AthisAoutputAcanAconnectedAtoAinputAsectionA(labelA6)AasAfeedback.AA A LabelA4:ASpeakerAOutputA ConnectedAtoAspeakerAwithA8ohmAorA4AohmA A LabelA5:ADigitalASignalAInputA ConnectedAtoAdigitalAaudioAformatsAasAI2S,ARightAJustifiedAandALeftAJustified.A A LabelA6:ASignalAInputA ThereAareAfourAstereoAinputsAinAtheAsection.APleaseAinputAstereoAaudioAsignal,AasAmusicAorAsineAwave.A A LabelA7:AResetA AllAI/OApinsAareAresetAtoAdefaultAvalues.A A LabelA8:ALEDAIndicatorA TheALEDsAindicateAtheAchipAstatusAandAIRAreceivedAstatus.AItAkeepsAonAaAlightAstateAwhenAtheAMS6821AisAactive.ATheAotherA hand,AkeepsAonAaAdarkAstateAwhenAtheAMS6821AisApowerLoff.AItAisAredLdarkAblinkAonceAwhenAtheAMCUAhasAreceivedAtheA functionAcodeAcorrectly.A A A 1C 2C 3C

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC25 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C SE mode and BTL mode operation TheAheadphoneAcontrolsAoperationalAmode.ASystemAentersASEAmodeAwhenAheadphoneAjackAisAempty.A WhenAaAsetAofAheadphoneApluggedAintoAtheAjack,AtheAsystemAswitchedAtoABTLAmode.A A A IR Controller Power ON/OFF : TheApowerAkey. PressAtheAkeyAonceAtoAsetApowerLonAorApowerLoffAforAMS6821.A IN1~IN4 : AnalogAinputAchannel. PressAtheAkeyAonceAtoAselectAinputAchannel.A TheAdefaultAstateAisAIN1.A VOL+, VOL- : TheAvolumeAcontrolAkeys.A TheAvolumeAcontrolAinA1.25dB/stepAasAtheAswitchAisApressedAonce,AtheArangeAisA–77.5dBAtoA0dB.A AAAATheAdefaultAvalueAisAL20dB.A A Gain+, Gain- : TheAgainAcontrolAkeys.A TheAgainAcontrolAinA3dB/stepAasAtheAswitchAisApressedAonce,AtheArangeAisA0dBAtoA21dB.A TheAinitialAvalueAisA0dB.A Mute : TheAmuteAkey PressAtheAkeyAonceAtoAsetAmuteLonAorAmuteLoff.A AAAATheAdefaultAstateAisAmuteLoff.A A PD/Active : TheApowerAdownAkey. PressAtheAkeyAonceAtoAsetApowerLdownAorAactivationAforAMS6821.A A Mix_LR ON/OFF : ATheAmixingADACAsignalAkeys. Mix_LAON,AmixedAtheAleftAchannelAofADACAwithAtheAleftAchannelAofAinputAsignal. AAAAMix_RAOFF,AunmixedAtheArightAchannelAofADACAwithAtheArightAchannelAofAinputAsignal.A A I2S, LJF, RJF: TheAdigitalAinputAformatAkeys.A AAAAThereAareAthreeAformatsAcanAbeAselectedAthatAisAI2S,ALeftAjustifiedAandARightAjustified.A A

REVC1.0 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC26 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCwww.mosanalog.com C Circuit 0.1u +C13 10u +C11 10u C10 0.47u C24 100u AVCC SP1 SPK_R SP2 SPK_L AVDD WS 1 BCK 2 REF 3 R1 4 R2 5 R3 6 R4 7 Vss 8 PVDDR 9 LOUTR 10 +OUTR 11 GND 12 PVSSR 13 DAC_R 14 DAC_L 15 PVSSL 16 GND 17 +OUTL 18 LOUTL 19 PVDDL 20 VDD 21 L4 22 L3 23 L2 24 L1 25 SDA 26 SCL 27 DATA 28 MS6821 +C15 10u +C14 10u R 1 G 3L 2 IN1 R 1 G 3L 2 IN2 R 1 G 3L 2 IN3 R 1 G 3L 2 IN4 +C20 10u +C16 10u +C23 10u +C22 10u P3.7 11 RST 1 P1.0 12 P3.0 2 P1.1 13 P3.1 3 P1.2 14 XTAL2 4 P1.3 15 XTAL1 5 P1.4 16 P3.2 6 P1.5 17 P3.3 7 P1.6 18 P3.4 8 P1.7 19 P3.5 9 Vcc 20 GND 10 AT89C4051 VS 1 IR 3 GND 2 IR +C1 47u +C5 470P R1 220 10K 1 2 24M +C6 20P +C7 20P 10K + C2 10u RST DGND IR_IN DGND DAC_IN AGND IR_IN SCL SDA SCL SDA R5 1K R6 1K R7 1K DVDD J10 DAC_OUT +C25 100u 0.1u R 1 G 3L 2 J12 DAC_OUT L HP R G HEADPHONE + C18 100u +C19 100u OUT R4 100K HP_IN C21 C17 +C12 J13 LCD TX RX RX TX Jumper DGND AGND R10 1K R11 1K R12 1K R13 1K R14 1K R15 1K R16 1K R17 1K IN2 IN3 IN4 IN1 R18 R19 R20 R21 JUMP AVCC R22 100K