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外文翻译--ISD4004语音芯片在语音报站器中的应用.doc

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外文翻译--ISD4004语音芯片在语音报站器中的应用.doc

ISD4004voicechipvoicestopinthebrowserapplicationAbstractISD4004voicechipseriesaretheUnitedStatesISDintroducedproducts,withmultiplerepeatplayback,storagetime,whenusedwithouttheexpansionofmemory,peripheralcircuitsrequiredforfeaturessuchaseasy.IntroducedinthevoicechipISD4004stopdeviceinapracticalapplication,andexplainsitsfunctionanduseofmethods,thusenablingreaderstovoicechipISD4004seriesusetohaveapreliminaryunderstanding.KeywordsISD4004singlechipvoicestopbrowserISD4004voicechipISDarefromtheUnitedStateslaunchedthenewproducts.Onthevoicechippindescriptionoftheinternalcircuit,etc.,itiseasyintheISDchipinformationprovidedbythecompanyfound,Iwillnotdescribetoomuch,onlyabriefintroductiontoitscharacteristicsmakeone.Withordinaryrecording/playbackchipcompared,ISD4004hasthefollowingcharacteristicsFirst,therecorddoesnotsoundparagraphlength,andsoundrecordingsdonotneedA/DconversionandcompressionSecondly,asafastflashstoragemedium,thatis,withoutpowersupplydatacanbestoredforupto100years,morethan10,000duplicaterecordsInaddition,ISD4004hasrecordedalongtimeupto16minutes,thepaperusedforthe8minuteISD4004voicechipadvantagesFinally,ISD4004hasrequiredthedevelopmentandapplicationofperipheralcircuitsoftheadvantagesofeasy,Thisisevidentfromtheintroductionofthisarticlereportedthatstationsinthevoicebrowsercanbeofpracticalapplicationexperience.SoundStation1hardwarecircuitdesignCurrentlyonthemarketstoptheflowofvoice,andmostlynotusedISD4004seriesofchips,whichwereintroducednotlongago,aswellasitshighpricerelated.However,withthenumberofapplications,aswellasISD4004pricedrop,coupledwiththeISD4004seriesofchipshavingtheadvantage,itisbelievedthatthevoicebrowsertousestopISD4004seriesvoicechipsareentirelyfeasible.Idesignedthedeviceshardwarecircuit,andaBoarddebug,andachievedsatisfactoryresults.Figure1stophardwarecircuitconnectiondiagramThisarticlediscussesvoicestopdeviceisinstalledinthecarmeanstheplaybackcircuit,doesnotincludetherecordingcircuit.Inpracticalapplication,therecordingcircuitiscompletedstopthecontentsoftherecording,andrecordedcontentisstoredintothevoicechip.Inthispaper,combinedwiththeISD4004playbackcircuitISD4004introducetheuseofatypicalapplication.Thisarticlediscussesthebrowserstopmaincircuitmainlybysinglechipmicrocomputer89C52andconstituteISD4004.Thissystemismainlydividedintothreepartssinglechipcontroloftheplaybackpartanddisplaypart.DisplaycircuitusedbyP3.0,P3.1tocontrolthetwoparagraph7ofthestaticdigitaltubedisplay,andIshallnotdetailcontrolpartconstitutedmainlybythe89C52singlechipthatcontainsthenecessarykeyscircuit,resetcircuitandperipheralcircuits,suchaswatchdogcircuitplaybackfromISD4004constitutesomeofthemajor,includingsupportingthePSAcircuit,poweramplifiercircuit.FromFigure1canbeseen89C52andfewerconnectionsbetweentheISD4004.MCUP1.0P1.3pinaccessbuttons,controldevicesstopthecourseoftheirworkwhetherornotreleasethecontentsoftoneplaybackP1.6accesstheISD4004chipselectpin/SS,controlwhetherISD4004strobeISD4004thenP1.7serialinputpinMOSI,readfromthepintotheaddressofplaybackP3.0andP3.1tocontroltheexternaldisplaycircuit,inanewspaper,thecourseoftheirworkstationdevicedisplaysthecurrentnumberofstationsP3.2andP3.3,respectively,thenISD4004pinserialclockSCLKandinterruptpin/INT.ISD4004chipsneededtoconnectaudiosignalsareoutputpinsAUDOUT,thepinthroughafiltercapacitorconnectedwiththespeakerAMCAPtoautomaticallymuteend,throughtheuseofonegroundedcapacitor.Inaddition,becauseoftheworkofISD4004voltage3V,whilethesinglechipsupplyvoltagerequiredforthe5V,thereforebenecessarytoadopt3VvoltagetransformercircuitforuseISD4004.2SoftwareDesignElectriccircuits,thefirsttocompletetheinitializationprocedure,andthenquerythestatusbuttontoentersystemstandbymode.Ifyouhavepressthebutton,thenturntotheimplementationofthekeypointtotheworkprocedures.Keysincludingtheplaybackbuttonandstopbutton,plus1key,minusonekeyandspecialkeywords.Inthestandbymode,iftheplaybackbuttonispressedthefirsttime,theprogramwillbethefirsttojudgeareorgobacktothegeneralpathofthebusarenotonlygofurtherback,andthecorrespondingindicatorlightautomaticallyreadoutthefirststopplaybackofthecontent,StationNo.1show.Ifitisnotthefirstpress,thenthefirststationtodeterminethecurrentnumber,andthestationnumberisbasedonaccesstostoredcontentplaybackatthestationandthefirstaddressthencallsubroutineplayback,readaccesstothesiteinfrontofthecontentsofthefirstplaybackAddresstobeginplayback.Eachsentenceafterplayback,ISD4004interruptpin25feetwillbeautomaticallysenttoonelowlevelsignals.Inhardwaredesign,thepinandtheMCUP3.3connection,sowillcauseaninterruptionintheinterruptionsubroutine,thereisadisruptionRecordthenumberofcounters,whichdeterminewhentheendofthecurrentStation1,StationPlustogetherRefreshdisplay.Addonebuttonpress,theproceduresforthenextshiftplaybackcontentminusonekeypress,aftertheprocessisturnedonplaybackthecontentofonestation,thecorrespondingstationnumberdisplaywillalsorefreshspeciallanguagekeypressaftertheproceduretotheimplementationofthespeciallanguageplaybackforexample,turningPleasenoteandotherstatementsstopkeypress,wouldsuspendthecurrentplaybackstatus.ISD4004inordertofacilitatethereadersunderstandingoftheapplication,thispapersomeoftheprocedures.Partoftheproceduretocompletethemainplaybackoperation,togettheaddressofthecontentplaybacktotheISD4004,thecompletionofplayback.PLAYACALLPOWERUPsACALLDELAY25fNolaterthan25msCLRP1.64MOVPLAY2YMOVA8ACALLSENDinecalltosendtheaddressMOVAtACALLSENDISD4004语音芯片在语音报站器中的应用摘要ISD4004语音系列芯片是美国ISD公司推出的产品,具有可多次重复录放、存储时间长、使用时不需扩充存储器、所需外围电路简单等特点。介绍了ISD4004芯片在语音报站器中的一个实际应用,并说明了其功能和使用方法,从而使读者对ISD4004系列语音芯片的使用有个初步的了解。关键词ISD4004单片机语音报站器ISD4004语音芯片是由美国ISD公司推出的新产品。关于该语音芯片的引脚说明以及内部电路等,很容易在ISD公司提供的芯片资料中查到,笔者就不进行过多的描述,只简单地对其特点做一介绍。与普通的录音/重放芯片相比,ISD4004具有如下特点首先,记录声音没有段长度限制,并且声音记录不需要A/D转换和压缩其次,将快速闪存作为存储介质,无需电源即可保存数据长达100年,重复记录10000次以上此外,ISD4004具有记录时间长(可达16分钟,本文采用的为8分钟的ISD4004语音芯片)的优点最后,ISD4004的开发应用具有所需外围电路简单的优点,这一点从本文介绍的其在语音报站器中的实际应用可以体会到。1语音报站器硬件电路设计目前市场上流通的语音报站器,大多采用的不是ISD4004系列的芯片,这与其刚推出不久以及价格偏高有关。但随着ISD4004应用的增多以及价格的回落,再加上ISD4004系列芯片本身的优点,可以相信,在语音报站器中采用ISD4004系列语音芯片是完全可行的。笔者设计了该装置的硬件电路,并进行了上车调试,取得了较为满意的效果。本文讨论的语音报站器主要是指装在车上的放音电路,不包含录音电路。而在实际应用中,录音电路则完成报站内容的录音工作,并收录内容存储到语音芯片中。本文主要结合ISD4004在放音电路中的使用介绍ISD4004的典型应用。本文讨论的报站器主电路主要由单片机89C52和ISD4004构成。本系统主要分为三部分单片机控制部分、放音部分和显示部分。显示电路采用的是通过P3.0、P3.1控制的两个7段数码管的静态显示器,在此不作详细介绍控制部分主要由单片机89C52构成,包含必要的按键电路、复位电路和看门狗电路等外围电路放音部分主要由ISD4004构成,包含配套的变压电路、功放电路等。从图1中可以看出89C52和ISD4004之间的连接较少。单片机的P1.0~P1.3引脚接按键,控制报站器工作过程中是否放音和放音内容P1.6接ISD4004的片选引脚/SS,控制ISD4004是否选通P1.7接ISD4004的串行输入引脚MOSI,从该引脚读入放音的地址P3.0和P3.1控制外围显示电路,在报站器工作过程中显示当前的站号P3.2和P3.3分别接ISD4004的串行时钟引脚SCLK和中断引脚/INT。ISD4004芯片所需要的连接还有音频信号输出引脚AUDOUT,该引脚通过一个滤波电容与扬声器连接AMCAP为自动静音端,使用时通过一电容接地。此外,由于ISD4004的工作电压为3V,而单片机所需供电电压为5V,因此需要采用变压电路得到3V电压供ISD4004使用。2软件设计

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