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英文资料GENERALDESCRIPTIONTHEWINBONDISD1700CHIPCORDERSERIESISAHIGHQUALITY,FULLYINTEGRATED,SINGLECHIPMULTIMESSAGEVOICERECORDANDPLAYBACKDEVICEIDEALLYSUITEDTOAVARIETYOFELECTRONICSYSTEMSTHEMESSAGEDURATIONISUSERSELECTABLEINRANGESFROM26SECONDSTO120SECONDS,DEPENDINGONTHESPECIFICDEVICETHESAMPLINGFREQUENCYOFEACHDEVICECANALSOBEADJUSTEDFROM4KHZTO12KHZWITHANEXTERNALRESISTOR,GIVINGTHEUSERGREATERFLEXIBILITYINDURATIONVERSUSRECORDINGQUALITYFOREACHAPPLICATIONOPERATINGVOLTAGESPANSARANGEFROM24VTO55VTOENSURETHATTHEISD1700DEVICESAREOPTIMIZEDFORAWIDERANGEOFBATTERYORLINEPOWEREDAPPLICATIONSTHEISD1700ISDESIGNEDFOROPERATIONINEITHERSTANDALONEORMICROCONTROLLERSPIMODETHEDEVICEINCORPORATESAPROPRIETARYMESSAGEMANAGEMENTSYSTEMTHATALLOWSTHECHIPTOSELFMANAGEADDRESSLOCATIONSFORMULTIPLEMESSAGESTHISUNIQUEFEATUREPROVIDESSOPHISTICATEDMESSAGINGFLEXIBILITYINASIMPLEPUSHBUTTONENVIRONMENTTHEDEVICESINCLUDEANONCHIPOSCILLATORWITHEXTERNALRESISTORCONTROL,MICROPHONEPREAMPLIFIERWITHAUTOMATICGAINCONTROLAGC,ANAUXILIARYANALOGINPUT,ANTIALIASINGFILTER,MULTILEVELSTORAGEMLSARRAY,SMOOTHINGFILTER,VOLUMECONTROL,PULSEWIDTHMODULATIONPWMCLASSDSPEAKERDRIVER,ANDCURRENT/VOLTAGEOUTPUTTHEISD1700DEVICESALSOSUPPORTANOPTIONAL“VALERT”VOICEALERTFEATURETHATCANBEUSEDASANEWMESSAGEINDICATORWITHVALERT,THEDEVICEFLASHESANEXTERNALLEDTOINDICATETHATANEWMESSAGEISPRESENTBESIDES,FOURSPECIALSOUNDEFFECTSARERESERVEDFORAUDIOCONFIRMATIONOFOPERATIONS,SUCHAS“STARTRECORD”,“STOPRECORD”,“ERASE”,“FORWARD”,“GLOBALERASE”,ANDETCRECORDINGSARESTOREDINTOONCHIPFLASHMEMORY,PROVIDINGZEROPOWERMESSAGESTORAGETHISUNIQUESINGLECHIPSOLUTIONISMADEPOSSIBLETHROUGHWINBONDSPATENTEDMULTILEVELSTORAGEMLSTECHNOLOGYAUDIODATAARESTOREDDIRECTLYINSOLIDSTATEMEMORYWITHOUTDIGITALCOMPRESSION,PROVIDINGSUPERIORQUALITYVOICEANDMUSICREPRODUCTIONVOICESIGNALSCANBEFEDINTOTHECHIPTHROUGHTWOINDEPENDENTPATHSADIFFERENTIALMICROPHONEINPUTANDASINGLEENDEDANALOGINPUTFOROUTPUTS,THEISD1700PROVIDESAPULSEWIDTHMODULATIONPWMCLASSDSPEAKERDRIVERANDASEPARATEANALOGOUTPUTSIMULTANEOUSLYTHEPWMCANDIRECTLYDRIVEASTANDARD8SPEAKERORTYPICALBUZZER,WHILETHESEPARATEANALOGOUTPUTCANBECONFIGUREDASASINGLEENDEDCURRENTORVOLTAGEOUTPUTTODRIVEANEXTERNALAMPLIFIERWHILEINSTANDALONEMODE,THEISD1700DEVICESAUTOMATICALLYENTERINTOPOWERDOWNMODEFORPOWERCONSERVATIONAFTERANOPERATIONISCOMPLETEDINTHESPIMODE,THEUSERHASFULLCONTROLVIATHESERIALINTERFACEINOPERATINGTHEDEVICETHISINCLUDESRANDOMACCESSTOANYLOCATIONINSIDETHEMEMORYARRAYBYSPECIFYINGTHESTARTADDRESSANDENDADDRESSOFOPERATIONSSPIMODEALSOALLOWSACCESSTOTHEANALOGPATHCONFIGURATIONAPCREGISTERTHISREGISTERALLOWSFLEXIBLECONFIGURATIONOFAUDIOPATHS,INPUTS,OUTPUTSANDMIXINGTHEAPCDEFAULTCONFIGURATIONFORSTANDALONEMODECANALSOBEMODIFIEDBYSTORINGTHEAPCDATAINTOANONVOLATILEREGISTERNVCFGTHATISLOADEDATINITIALIZATIONUTILIZINGTHECAPABILITIESOFISD1700SERIES,DESIGNERSHAVETHECONTROLANDFLEXIBILITYTOIMPLEMENTVOICEFUNCTIONALITYINTOTHEHIGHENDPRODUCTSFEATURES1、INTEGRATEDMESSAGEMANAGEMENTSYSTEMSFORSINGLECHIP,PUSHBUTTONAPPLICATIONSRECLEVELTRIGGERFORRECORDINGPLAYEDGETRIGGERFORINDIVIDUALMESSAGEORLEVELTRIGGERFORLOOPINGPLAYBACKSEQUENTIALLYERASEEDGETRIGGEREDERASEFORFIRSTORLASTMESSAGEORLEVELTRIGGEREDERASEFORALLMESSAGESFWDEDGETRIGGERTOADVANCETOTHENEXTMESSAGEORFASTMESSAGESCANDURINGTHEPLAYBACKVOL8LEVELSOUTPUTVOLUMECONTROLRDY/INTREADYORBUSYSTATUSINDICATIONRESETRETURNTOTHEDEFAULTSTATEAUTOMATICPOWERDOWNAFTEREACHOPERATIONCYCLE2、SELECTABLESAMPLINGFREQUENCYCONTROLLEDBYANEXTERNALOSCILLATORRESISTOR3、SELECTABLEMESSAGEDURATIONAWIDERANGESELECTIONFROM30SECSTO240SECSAT8KHZSAMPLINGFREQUENCY4、MESSAGEANDOPERATIONINDICATORSFOURCUSTOMIZABLESOUNDEFFECTSSESFORAUDIBLEINDICATIONOPTIONALVALERTVOICEALERTTOINDICATETHEPRESENCEOFNEWMESSAGESLEDSTAYONDURINGRECORDING,BLINKDURINGPLAYBACK,FORWARDANDERASEOPERATIONS5、DUALOPERATINGMODESSTANDALONEMODE（1）INTEGRATEDMESSAGEMANAGEMENTTECHNIQUES（2）AUTOMATICPOWERDOWNAFTEREACHOPERATIONCYCLESPIMODEFULLYUSERSELECTABLEANDCONTROLLABLEOPTIONSVIAAPCREGISTERANDVARIOUSSPICOMMANDS6、TWOINDIVIDUALINPUTCHANNELSMIC/MICDIFFERENTIALMICROPHONEINPUTSWITHAGCAUTOMATICGAINCONTROLANAINSINGLEENDEDAUXILIARYANALOGINPUTFORRECORDINGORFEEDTHROUGH7、DUALOUTPUTCHANNELSDIFFERENTIALPWMCLASSDSPEAKEROUTPUTSDIRECTLYDRIVESAN8SPEAKERORATYPICALBUZZERCONFIGURABLEAUDCURRENTORAUXVOLTAGESINGLEENDEDOUTPUTDRIVESEXTERNALAUDIOAMPLIFIER8、CHIPCORDERSTANDARDFEATURESHIGHQUALITY,NATURALVOICEANDAUDIOREPRODUCTION24VTO55VOPERATINGVOLTAGE9、PACKAGINGTYPESAVAILABLEINDIE,PDIP,SOICANDTSOPFUNCTIONALDESCRIPTION1、DETAILEDDESCRIPTION（1）AUDIOQUALITYWINBONDSPATENTEDCHIPCORDERMULTILEVELSTORAGEMLSTECHNOLOGYPROVIDESANATURAL,HIGHQUALITYRECORDANDPLAYBACKSOLUTIONONASINGLECHIPTHEINPUTVOICESIGNALSARESTOREDDIRECTLYINTHEFLASHMEMORYANDAREREPRODUCEDINTHEIRNATURALFORMWITHOUTANYOFTHECOMPRESSIONARTIFACTSCAUSEDBYDIGITALSPEECHSOLUTIONS（2）MESSAGEDURATIONTHEISD1700SERIESOFFERRECORDANDPLAYBACKDURATIONFROM20SECONDSTO480SECONDSSAMPLINGFREQUENCYANDMESSAGEDURATION,TDUR,AREDETERMINEDBYANEXTERNALRESISTORCONNECTEDTOTHEROSCPIN（3）FLASHSTORAGETHEISD1700DEVICESUTILIZEEMBEDDEDFLASHMEMORYTOPROVIDENONVOLATILESTORAGEAMESSAGECANBERETAINEDFORAMINIMUMOF100YEARSWITHOUTPOWERADDITIONALLY,EACHDEVICECANBERERECORDEDOVER100,000TIMESTYPICAL2、MEMORYARRAYARCHITECTURETHEMEMORYARRAYPROVIDESSTORAGEOFFOURSPECIALSOUNDEFFECTSSESASWELLASTHEVOICEDATATHEMEMORYARRAYISADDRESSEDBYROWSAROWISTHEMINIMUMSTORAGERESOLUTIONBYWHICHTHEMEMORYCANBEADDRESSEDTHEMEMORYASSIGNMENTISAUTOMATICALLYHANDLEDBYTHEINTERNALMESSAGEMANAGEMENTSYSTEMINSTANDALONEMODEWHILEINSPIMODE,ONEHASTHEFULLACCESSTOTHEENTIREMEMORYVIATHEELEVENADDRESSBITSTHEFOURSOUNDEFFECTSSEOCCUPYTHEFIRSTSIXTEENROWSINTHEMEMORYARRAYWITHFOURROWSFOREACHSETHATMEANSFROMADDRESS0X000TOADDRESS0X00FTHEREMAININGMEMORYISDEDICATEDTOVOICEDATASTORAGEHENCE,THEADDRESSOFVOICEMESSAGESTORAGEWILLSTARTFROM0X010TOTHEENDOFMEMORYARRAY3、MODESOFOPERATIONSTHEISD1700SERIESCANOPERATEINEITHERSTANDALONEPUSHBUTTONORMICROCONTROLLERSPIMODE（1）STANDALONEPUSHBUTTONMODESTANDALONEOPERATIONENTAILSUSEOFTHEREC,PLAY,FT,FWD,ERASE,VOLANDRESETPINSTOTRIGGEROPERATIONSTHEINTERNALSTATEMACHINEAUTOMATICALLYCONFIGURESTHEAUDIOPATHACCORDINGTOTHEDESIREDOPERATIONINTHISMODE,THEINTERNALSTATEMACHINETAKESFULLCONTROLONMESSAGEMANAGEMENTTHISALLOWSTHEUSERTORECORD,PLAYBACK,ERASE,ANDFORWARDMESSAGESWITHOUTTHENEEDSTOKNOWTHEEXACTADDRESSESOFTHEMESSAGESSTOREDINSIDETHEMEMORY（2）SPIMODEINSPIMODE,CONTROLOFTHEDEVICEISACHIEVEDTHROUGHTHE4WIRESERIALINTERFACECOMMANDSSIMILARTOTHEPUSHBUTTONCONTROLS,SUCHASREC,PLAY,FT,FWD,ERASE,VOLANDRESET,CANBEEXECUTEDTHROUGHTHESPIINTERFACEINADDITION,THEREARECOMMANDSTHATALLOWTHEMODIFICATIONOFTHEANALOGPATHCONFIGURATION,ASWELLASCOMMANDSTHATDIRECTACCESSTHEMEMORYADDRESSOFTHEARRAY,PLUSOTHERSTHESPIMODEALLOWSFULLCONTROLOFTHEDEVICEANDTHEABILITYTOPERFORMCOMPLEXMESSAGEMANAGEMENTRATHERTHANCONFORMTOTHECIRCULARMEMORYARCHITECTUREASPUSHBUTTONMODEINADDITION,ITISSUGGESTEDTHATBOTHTHEMICROCONTROLLERANDTHEISD1700DEVICEHAVETHESAMEPOWERSUPPLYLEVELFORDESIGNSIMPLICITYINEITHERMODE,ITISSTRONGLYRECOMMENDEDTHATANYUNUSEDPINS,NOMATTERINPUTOROUTPUT,MUSTBELEFTFLOATEDORUNCONNECTEDOTHERWISE,ITWILLCAUSETHEDEVICEBECOMINGMALFUNCTIONANALOGPATHCONFIGURATIONAPCTHEANALOGPATHOFTHEISD1700CANBECONFIGUREDTOACCOMMODATEAWIDEVARIETYOFSIGNALPATHPOSSIBILITIESTHISINCLUDESTHESOURCEOFRECORDINGSIGNALS,MIXINGOFINPUTSIGNALS,MIXINGTHEPLAYBACKSIGNALWITHANINPUTSIGNALTOTHEOUTPUTS,FEEDTHROUGHSIGNALTOTHEOUTPUTSANDWHICHOUTPUTSBEINGACTIVATEDTHEACTIVEANALOGPATHCONFIGURATIONISDETERMINEDBYACOMBINATIONOFTHEINTERNALSTATEOFTHEDEVICE,IEDESIREDOPERATIONRECORDORPLAYBACK,THESTATUSOFTHEFTANDTHECONTENTSOFTHEAPCREGISTERTHEAPCREGISTERISINITIALIZEDBYTHEINTERNALNONVOLATILECONFIGURATIONNVCFGBITSUPONPOWERONRESETORRESETFUNCTIONTHEAPCREGISTERCANBEREADANDLOADEDUSINGSPICOMMANDSTHEFACTORYDEFAULTOFNVCFGBITS,IS0100010000000X440THISCONFIGURESTHEDEVICEWITHRECORDINGTHROUGHTHEMICINPUTS,FTVIAANAININPUT,PLAYBACKFROMMLS,SEEDITINGFEATUREENABLED,MAXIMUMVOLUMELEVEL,ACTIVEPWMDRIVERANDAUDCURRENTOUTPUTSONECANUSESPICOMMANDSTOMODIFYTHEAPCREGISTERANDSTOREITPERMANENTLYINTOTHENVCFGBITSTHEDEVICECANBEINPOWERDOWN,POWERUP,RECORDING,PLAYBACKAND/ORFEEDTHROUGHSTATEDEPENDINGUPONTHEOPERATIONREQUESTEDBYTHEPUSHBUTTONSORRELATEDSPICOMMANDSTHEACTIVEPATHINEACHOFTHESESTATESISDETERMINEDBYD3ANDD4OFTHEAPCREGISTER,ASWELLASEITHERD6OFTHEAPCREGISTERINSPIMODEORTHEFTSTATUSINSTANDALONEMODEINADDITION,D7D9OFTHEAPCREGISTERDETERMINEWHICHOUTPUTDRIVERSAREACTIVATEDSTANDALONEPUSHBUTTONOPERATIONSONECANUTILIZETHEREC,PLAY,FT,FWD,ERASE,VOLORRESETCONTROLTOINITIATEADESIREDOPERATIONASCOMPLETED,THEDEVICEAUTOMATICALLYENTERSINTOTHEPOWERDOWNSTATEANUNIQUEMESSAGEMANAGEMENTSYSTEMISEXECUTEDUNDERTHISMODE,WHICHLINKSTOANOPTIONALSPECIALSOUNDEFFECTSEFEATURETOREVIEWCERTAINOPERATINGSTATUSOFTHEDEVICEHENCE,ITISBENEFITTOUNDERSTANDHOWSEFUNCTIONSFIRST1、SOUNDEFFECTSEMODESEMODECANBEMANIPULATEDBYSEVERALCONTROLPINSASDESCRIBEDBELOWTHEREAREFOURSPECIALSOUNDEFFECTSSE1,SE2,SE3,ANDSE4AUDIOCLIPSCANBEPROGRAMMEDINTOTHESESASVARIOUSINDICATIONSEACHSEOCCUPIESFOURDESIGNATEDMEMORYROWSANDTHEFIRSTSIXTEENMEMORYROWSARERESERVEDFORTHESEFOURSESEVENLYANDSEQUENTIALLY（1）SOUNDEFFECTSEFEATURESTHEFUNCTIONSOFSESAREUSEDTOINDICATETHESTATUSOFTHEFOLLOWINGOPERATIONSSE1BEGINNINGOFRECORDING,FORWARDORGLOBALERASEWARNINGSE2ENDOFRECORDING,SINGLEERASEORFORWARDFROMLASTMESSAGESE3INVALIDERASEOPERATIONSE4SUCCESSFULGLOBALERASEINGENERAL,THELEDFLASHESONCEFORSE1,TWICEFORSE2,ANDSOFORTHITISCRUCIALTORECOGNIZETHATTHELEDFLASHESACCORDINGLYREGARDLESSTHESESAREPROGRAMMEDORNOTWHENNONEOFTHEMISPROGRAMMED,THEBLINKINGPERIODSOFSE1,SE2,SE3ANDSE4AREDEFINEDASTLS1,TLS2,TLS3ANDTLS4,RESPECTIVELYONCETHEYAREPROGRAMMED,DURINGOPERATION,THEDEVICEFLASHESLEDANDPLAYSTHERELATEDSESIMULTANEOUSLYNEVERTHELESS,THEPERIODOFBLINKINGLED,UNDERTHISCONDITION,ISLIMITEDBYTHEDURATIONOFTHERECORDEDSEINADDITION,THEYAREDEFINEDASTSE1,TSE2,TSE3ANDTSE4,RESPECTIVELYTHESETIMINGPARAMETERSALSOAPPLYTOTHECONDITIONSELABORATEDINTHEFOLLOWINGRELATEDSECTIONS（2）ENTERINGSEMODEFIRSTPRESSANDHOLDFWDLOWFOR3SECONDSORMOREROUGHLYTHISACTIONONFWDWILLUSUALLYBLINKLEDONCEANDPLAYSE1SIMULTANEOUSLYIFSE1ISRECORDEDHOWEVER,IFPLAYBACKPOINTERISATTHELASTMESSAGEORMEMORYISEMPTY,THECHIPWILLBLINKTHELEDTWICEANDPLAYSE2SIMULTANEOUSLYIFSE2ISRECORDEDWHILEHOLDINGFWDLOW,PRESSANDHOLDTHERECLOWUNTILTHELEDBLINKSONCETHELEDFLASHINGONCEAGAININDICATESTHATTHEDEVICEISNOWINSEMODEONCEENTERINGINTOSEMODE,THESE1ISALWAYSTHEFIRSTONETOBEACCESSIBLE（3）SEEDITINGAFTERINTOSEEDITINGMODE,ONECANPERFORMRECORD,PLAY,ORERASEOPERATIONONEACHSEBYPRESSINGTHEAPPROPRIATEBUTTONSFOREXAMPLE,TORECORDSE,SIMPLYPRESSANDHOLDRECSIMILARLYFORPLAYORERASEFUNCTION,PULSEPLAYORERASE,RESPECTIVELYRECORDSOURCECANBEEITHERMIC/ORANAINASUBSEQUENTFWDOPERATIONMOVESTHERECORDANDPLAYBACKPOINTERSTOTHENEXTSESEQUENTIALLYTHELEDWILLALSOBLINKONETOFOURTIMESAFTERSUCHOPERATIONTOINDICATEWHICHSEISACTIVEIFFWDISPRESSEDWHILEINSE4,THELEDWILLFLASHONCETOINDICATETHATSE1ISAGAINACTIVEWHILETHELEDISBLINKING,THEDEVICEWILLIGNOREANYINPUTCOMMANDSONEMUSTWAITPATIENTLYUNTILTHELEDSTOPSBLINKINGCOMPLETELYBEFOREANYRECORD,PLAY,ERASEORFORWARDINPUTSHOULDBESENT（4）EXITINGSEMODETHEREQUIREDSTEPSARETHESAMEASENTERINGSEMODEFIRSTPRESSANDHOLDFWDUNTILTHELEDSTOPSBLINKINGANDRELATEDSEISPLAYEDIFSESAREPROGRAMMEDTHEN,SIMULTANEOUSLYPRESSANDHOLDTHERECLOWUNTILTHELEDBLINKSTWICEANDDEVICEWILLPLAYSE2IFSE2ISPROGRAMMEDTHEDEVICENOWEXITSTHESEEDITINGMODE2、OPERATIONOVERVIEWAFTERPOWERISAPPLIEDORPOWERONRESETPOR,THEDEVICEISINTHEFACTORYDEFAULTSTATEANDTWOINTERNALRECORDANDPLAYBACKPOINTERSAREINITIALIZEDTHESETWOPOINTERSAREDISCUSSEDLATERTHENTHEACTIVEANALOGPATHISDETERMINEDBYTHESTATEOFTHEFT,THESTATUSOFTHEAPCREGISTERANDTHEDESIREDOPERATIONUPTOFOUROPTIONALSOUNDEFFECTSSE1SE4CANBEPROGRAMMEDINTOTHEDEVICETOPROVIDEAUDIBLEFEEDBACKTOALERTTHEUSERABOUTTHEOPERATINGSTATUSSIMULTANEOUSLY,THELEDOUTPUTPROVIDESVISUALINDICATIONABOUTTHEOPERATINGSTATUSDURINGTHEACTIVESTATEOFLEDOUTPUT,NONEWCOMMANDWILLBEACCEPTEDANUNIQUEMESSAGEMANAGEMENTTECHNIQUEISIMPLEMENTEDUNDERTHISMODE,THERECORDEDMESSAGESARESTOREDSEQUENTIALLYINTOTHEEMBEDDEDMEMORYFROMTHEBEGINNINGTOTHEENDINACIRCULARFASHIONAUTOMATICALLYTWOINTERNALPOINTERS,THERECORDPOINTERANDPLAYBACKPOINTER,DETERMINETHELOCATIONWHEREANOPERATIONSTARTSAFTERPOR,THESEPOINTERSAREINITIALIZEDASFOLLOWSIFNOMESSAGESAREPRESENT,BOTHPOINTTOTHEBEGINNINGOFMEMORYIFMESSAGESAREPRESENT,THERECORDPOINTERPOINTSTOTHENEXTAVAILABLEMEMORYROWFOLLOWINGTHELASTMESSAGEANDTHEPLAYBACKPOINTERPOINTSTOTHEBEGINNINGOFTHELASTRECORDEDMESSAGETHEPLAYBACKPOINTERISAFFECTEDEITHERBYTHEFWDORRECOPERATIONTHERECORDPOINTERISUPDATEDTOTHENEXTAVAILABLEMEMORYROWAFTEREACHRECOPERATION（1）RECORDOPERATIONTHERECCONTROLSRECORDINGOPERATIONONCESETTINGTHISPINLOW,THEDEVICESTARTSRECORDINGFROMTHENEXTAVAILABLEROWINMEMORYANDCONTINUESRECORDINGUNTILEITHERTHERECRETURNSTOHIGHORTHEMEMORYISFULLTHESOURCEOFRECORDINGISFROMEITHERMIC/ORANAIN,WHEREASTHEACTIVEANALOGCONFIGURATIONPATHISDETERMINEDBYTHEDESIREDOPERATIONANDTHESTATEOFTHEFTTHERECISDEBOUNCEDINTERNALLYAFTERRECORDING,THERECORDPOINTERWILLMOVETOTHENEXTAVAILABLEROWFROMTHELASTRECORDEDMESSAGEANDTHEPLAYBACKPOINTERWILLPOSITIONATTHEBEGINNINGOFTHENEWLYRECORDEDMESSAGEHOWEVER,ITISIMPORTANTTOPERFORMANERASEOPERATIONONTHEDESIREDLOCATIONBEFOREANYRECORDINGPROCEEDSINADDITION,THEPOWERSUPPLYMUSTREMAINONDURINGTHEENTIRERECORDINGPROCESSIFPOWERISINTERRUPTEDDURINGRECORDINGPROCESS,THECIRCULARMEMORYARCHITECTUREWILLBEDESTROYEDASARESULT,NEXTTIMEWHENAPUSHBUTTONOPERATIONSTARTS,THELEDWILLBLINKSEVENTIMES,WHICHINDICATESTHATSOMETHINGUNUSUALHASOCCURRED,ANDTHEDEVICEWILLFAILTOPERFORMTHEREQUESTEDOPERATIONUNDERSUCHSCENARIO,THEONLYWAYTORECOVERTHECHIPTOAPROPERSTATEISTOPERFORMAGLOBALERASEOPERATIONMESSAGERECORDINGINDICATORSTHEBUILTINMESSAGEMANAGEMENTTECHNIQUEASSOCIATESSPECIALSOUNDEFFECTS,SE1ANDSE2,WITHINTHERECORDINGPROCESSA、WHENRECGOESLOWIFSE1ISNOTPROGRAMMED,THENTHELEDTURNSONIMMEDIATELYTOINDICATETHATARECORDINGISINPROGRESSIFSE1ISPROGRAMMED,DEVICEPLAYSSE1ANDBLINKSLEDSIMULTANEOUSLYTHENLEDTURNSONTOSHOWRECORDINGISINPROCESSTHELEDBLINKINGPERIODOFSE1ISDETERMINEDBYTHERECORDEDDURATIONOFSE1TSE1B、WHENRECGOESHIGHORWHENTHEMEMORYISFULLIFSE2ISNOTPROGRAMMED,THENTHELEDTURNSOFFIMMEDIATELYTOINDICATETHATTHERECORDINGHALTSIFSE2ISPROGRAMMED,DEVICEPLAYSSE2ANDFLASHESLEDSIMULTANEOUSLYTHENLEDTURNSOFFTOSHOWRECORDINGSTOPSTHELEDBLINKINGPERIODOFSE2ISDETERMINEDBYTHERECORDEDDURATIONOFSE2TSE2TRIGGERINGOFRECDURINGAPLAY,ERASEORFORWARDOPERATIONISANILLEGALOPERATIONANDWILLBEIGNORED（2）PLAYBACKOPERATIONTWOPLAYBACKMODESCANBEEXECUTEDBYPLAY,WHICHISINTERNALLYDEBOUNCEDA、EDGETRIGGERMODEPULSINGPLAYLOWONCEINITIATESAPLAYBACKOPERATIONOFTHECURRENTMESSAGEPLAYBACKAUTOMATICALLYSTOPSATTHEENDOFTHEMESSAGEPULSINGPLAYAGAINWILLREPLAYTHEMESSAGEDURINGPLAYBACK,THELEDFLASHESANDGOESOFFWHENTHEPLAYBACKCOMPLETESPULSINGPLAYTOLOWAGAINDURINGPLAYBACKSTOPSTHEPLAYBACKOPERATIONUNDERTHESECIRCUMSTANCES,THEPLAYBACKPOINTERREMAINSATTHESTARTOFTHEPLAYEDMESSAGEAFTERTHEOPERATIONISCOMPLETEDB、LOOPINGPLAYBACKMODEASPLAYISHELDLOWCONSTANTLY,THEDEVICEPLAYSALLMESSAGESSEQUENTIALLYFROMTHECURRENTMESSAGETOITSPREVIOUSMESSAGEANDLOOPSTHEPLAYBACKACTIONDURINGTHEENTIREPLAYBACKPROCESS,THELEDFLASHESNONSTOPMEANWHILE,THELOOPINGPLAYBACKMECHANISMISIMPLEMENTEDINTHEFOLLOWINGSEQUENCESTARTPLAYBACKFROMCURRENTMESSAGEASPLAYBACKISOVER,PERFORMAFORWARDOPERATIONSTARTPLAYBACKOFNEWMESSAGEONCEPLAYBACKCOMPLETES,PERFORMANOTHERFORWARDACTIONSTARTPLAYBACKOFNEWMESSAGE,ANDSOONTHISLOOPINGPATTERNCONTINUESUNTILPLAYISRELEASEDASPLAYISRELEASED,DEVICEWILLCONTINUETOPLAYBACKTHECURRENTMESSAGEUNTILCOMPLETIONWHENPLAYBACKSTOPS,THEPLAYBACKPOINTERISSETATTHESTARTOFTHEHALTEDMESSAGEIFNOSE1ANDSE2AREPROGRAMMED,AFTERPLAYINGAMESSAGE,EXCEPTTHELASTONE,DEVICEFLASHESLEDONCEWITHBLINKINGPERIODTLS1DUETOFORWARDACTIONASAFTERTHELASTMESSAGE,DEVICEFLASHESLEDTWICEWITHBLINKINGPERIODTLS2IFBOTHSE1ANDSE2AREPROGRAMMED,AFTERPLAYINGAMESSAGE,EXCEPTTHELASTONE,DEVICEPLAYSSE1ANDFLASHESLEDSIMULTANEOUSLYDUETOFORWARDACTIONTHENDEVICEKEEPSONTHEPLAYBACKOFNEWMESSAGEALTERNATIVELY,AFTERPLAYINGTHELASTMESSAGE,DEVICEPLAYSSE2ANDFLASHESLEDSIMULTANEOUSLYDUETOFORWARDACTIONTHENDEVICEMAINTAINSTHEPLAYBACKOFTHEFIRSTMESSAGETHELEDBLINKINGPERIODOFSE1ANDSE2AREDETERMINEDBYTHERECORDEDDURATIONSOFSE1ANDSE2,RESPECTIVELYTRIGGERINGPLAYDURINGARECORD,ERASE,ORFORWARDOPERATIONISANILLEGALOPERATIONANDWILLBEIGNORED（3）FORWARDOPERATIONTHEFWDALLOWSTHEDEVICETOADVANCETHEPLAYBACKPOINTERTOTHENEXTMESSAGEINAFORWARDDIRECTIONWHENTHEPOINTERREACHESTHELASTMESSAGE,ITWILLJUMPBACKTOTHEFIRSTMESSAGEHENCE,THEMOVEMENTISALIKEACIRCULARFASHIONAMONGTHEMESSAGESTHEFWDISDEBOUNCEDINTERNALLYTHEEFFECTOFALOWGOINGPULSEONTHEFWDDEPENDSONTHECURRENTSTATEOFTHEDEVICEA、IFTHEDEVICEISINPOWERDOWNSTATEANDTHEPLAYBACKPOINTERDOESNOTPOINTTOTHELASTMESSAGE,THENTHEPLAYBACKPOINTERWILLADVANCETOTHENEXTMESSAGEIFSE1ISNOTRECORDED,DEVICEWILLFLASHLEDONCEWITHBLINKINGPERIODTLS1HOWEVER,IFSE1ISRECORDED,DEVICEPLAYSSE1ANDBLINKSTHELEDONCESIMULTANEOUSLYTHELEDBLINKINGPERIODISDETERMINEDBYTHERECORDEDDURATION,TSE1,OFSE1B、IFTHEDEVICEISINPOWERDOWNSTATEANDTHEPLAYBACKPOINTERPOINTSTOTHELASTMESSAGE,THENTHEPLAYBACKPOINTERWILLADVANCETOTHEFIRSTMESSAGEIFSE2ISNOTRECORDED,DEVICEWILLFLASHLEDTWICEWITHBLINKINGPERIODTLS2HOWEVER,IFSE2ISRECORDED,DEVICEPLAYSSE2ANDBLINKSTHELEDTWICESIMULTANEOUSLYTHELEDBLINKINGPERIODISDETERMINEDBYTHERECORDEDDURATION,TSE2,OFSE2C、IFTHEDEVICEISCURRENTLYPLAYINGAMESSAGETHATISNOTTHELASTONE,THENTHEDEVICEHALTSTHEPLAYBACKOPERATIONADVANCESTHEPLAYBACKPOINTERTOTHENEXTMESSAGEIFSE1ISNOTRECORDED,DEVICEWILLFLASHLEDONCEWITHBLINKINGPERIODTLS1HOWEVER,IFSE1ISRECORDED,DEVICEPLAYSSE1ANDBLINKSTHELEDONCESIMULTANEOUSLYTHELEDBLINKINGPERIODISDETERMINEDBYTHERECORDEDDURATION,TSE1,OFSE1PLAYBACKTHENEWMESSAGETHELEDFLASHESDURINGTHISENTIREPROCESSD、IFTHEDEVICEISCURRENTLYPLAYINGTHELASTMESSAGE,THENTHEDEVICEHALTSTHEPLAYBACKOPERATIONADVANCESTHEPLAYBACKPOINTERTOTHEFIRSTMESSAGEIFSE2ISNOTRECORDED,DEVICEWILLFLASHLEDTWICEWITHBLINKINGPERIODTLS2HOWEVER,IFSE2ISRECORDED,DEVICESIMULTANEOUSLYPLAYSSE2ANDBLINKSTHELEDTWICETHELEDBLINKINGPERIODISDETERMINEDBYTHERECORDEDDURATION,TSE2,OFSE2PLAYBACKTHEFIRSTMESSAGETHELEDFLASHESDURINGTHISENTIREPROCESSTRIGGERINGOFTHEFWDOPERATIONDURINGANERASEORRECORDOPERATIONISANILLEGALOPERATIONANDWILLBEIGNORED中文翻译概述华邦公司生产的ISD1700系列录放芯片是一种高性能，高集成度，单芯片多段的语音录放芯片，适合多种电子化系统。该芯片的录音时长可由用户根据具体设计，在26秒到120秒内自行选择。芯片的采样频率可通过外部的电阻器，在4KHZ到12KHZ之间调整，为用户在应用时的持续时长及品质提供更多的选择性。供电范围在24V到55V之间，保证了ISD1700系列语音芯片在电池或线路供电时具有较宽的选择范围。ISD1700系列语音芯片可工作在独立按键模式或微处理器控制模式（SPI）。芯片内集成了专用的信息管理系统，使该芯片能够自我管理多段录音信息。这种特殊的功能使其在独立按键模式下也能进行多段语音录放。此芯片包含一个片上振荡器（通过外部电阻调节其振荡频率），带自动增益控制（AGC）的话筒运放，一个辅助模拟输入，抗锯齿滤波器，