单片机数字电压表中英文对照外文翻译文献Word下载.docx
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单片机数字电压表中英文对照外文翻译文献Word下载.docx
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Alsoknownassingle-chipmicroprocessor,firstbecauseitwasusedinthefieldofindustrialcontrol.Onlybythesingle-chipCPUchipdevelopedfromthededicatedprocessor.ThedesignconceptisthefirstbyalargenumberofperipheralsandCPUinasinglechip,thecomputersystemsothatsmaller,moreeasilyintegratedintothecomplexanddemandingonthevolumecontroldevices.INTELtheZ80isoneofthefirstdesigninaccordancewiththeideaoftheprocessor,Fromthenon,theMCUandthedevelopmentofadedicatedprocessorpartedways.
Atpresent,single-chiptoinfiltrateallareasofourlives,whichisverydifficulttofindtheareaofalmostnotracesofsingle-chipmicrocomputer.Missilenavigationequipment,aircraftcontrolonavarietyofinstruments,computernetworkcommunicationsanddatatransmission,industrialautomation,real-timeprocesscontrolanddataprocessing,arewidelyusedinavarietyofsmartICcard,limousineciviliansecuritysystems,videorecorders,cameras,thecontrolofautomaticwashingmachines,aswellasprogram-controlledtoys,electronicpet,etc.,whichareinseparablefromthesingle-chipmicrocomputer.Nottomentionthefieldofrobotautomation,intelligentinstrumentation,medicalequipmenthasbeen.
Throughoutthedevelopmentprocessofsingle-chip,youcanindicatethedevelopmenttrendofsingle-chip,generallyare:
1.Oflow-powerCMOS
MCS-51seriesof8031introducedthepowerconsumptionof630mW,andnowwidespreadinthesingle-chip100mWorso,withthegrowingdemandforlow-powersingle-chip,andnowallthebasicsingle-chipmanufacturersareuseofCMOS(complementarymetaloxidesemiconductorprocess).Asthe80C51ontheuseofHMOS(highdensitymetaloxidesemiconductorprocess)andCHMOS(high-densitycomplementarymetaloxidesemiconductorprocess).AlthoughtheCMOSlowpowerconsumption,butbecauseofitsphysicalcharacteristicstodetermineitsspeedisnothighenough,andthenCHMOSwithhigh-speedandlowpowerconsumptioncharacteristicsofthesefeatures,itismoresuitableinlowpowerconsumption,asbattery-poweredapplications.Therefore,theprocessforsometimetocomewillbethemainwaytodevelopsingle-chipmicrocomputer.
2.Singal-chipofmicro-chip
Nowgenerallyinconventionalsingle-chipwillbethecentralprocessingunit(CPU),randomaccessdatastorage(RAM),read-onlyprogrammemory(ROM),parallelandserialcommunicationinterface,systeminterruption,timingcircuits,integratedcircuitclockinasinglechip,enhancedsingle-chipintegration,suchasA/Dconverter,PMW(pulsewidthmodulationcircuit),WDT(watchdog),andsomewillbesingle-chipLCD(LCD)driverintegratedcircuitsareinasinglechip,thisunitincludessingle-chipcircuitsonmoreandmorepowerfulfeatures.Evensingle-chipmanufacturerscanalsobetailoredinaccordancewiththerequirementsofusers,tocreateasinglechipwithitsownchipcharacteristics.
3.Mainstreamandmulti-speciescoexistence
Althoughawidevarietyofsingle-chip,unique,butstillsingle-chipmicrocomputer80C51prevailingatthecore,compatiblewithitsstructureandcommandsystemofPHILIPSproducts,ATMELcompany'
sproductsandChinaTaiwan'
sWinbondSeriessingle-chipmachine.Therefore,single-chipmicrocomputerasthecoreC8051occupiedthehalf.Microchip'
sPICandreducedinstructionset(RISC)hasastrongdevelopmentmomentumofChinaTaiwanHOLTEKsingle-chipcompaniesinrecentyears,increasingproduction,withitshighqualitylow-costadvantages,tooccupyacertainmarketshare.MOTOROLAadditiontothecompany'
sproducts,severallargecompaniesinJapan'
sexclusivesingle-chipmicrocomputer.Acertainperiodoftime,thissituationwillcontinuetobeupheld,therewillnotbeasingle-chipmonopolydomination,takingthecomplementaryinterdependence,complementarityandcommondevelopment.
AT89C51isaflickerwith4KbytesEEPROM-programmablelow-voltage,high-performancedigitalmicroprocessorsCMOS8,commonlyknownassingle-chipmicrocomputer.AT89C2051isaflickerwith2KbytesEEPROMprogrammablemicrocontroller.MCUEEPROMerasurecanberepeated100times.ThedeviceATMELmanufacturehigh-densitynonvolatilememorytechnologywithindustry-standardMCS-51instructionsetandpincompatibleoutput.Owingtothemulti-purpose8-bitCPUandflashmemorychipsinasingleportfolio,ATMEL'
sAT89C51microcontrollerisahighlyefficient,AT89C2051isastreamlinedversionofit.AT89Csingle-chipembeddedcontrolsystemformanyprovidesaflexibleandinexpensiveprogram.
AT89C51performance:
1.AndMCS-51compatible
2.4KbytesofprogrammableFlashMemory
3.Lifeexpectancy:
1000write/wipecycle
4.Dataretentiontime:
10years
5.Staticworkofthewhole:
0Hz-24MHz
6.Three-levelProgramMemoryLock
7.128×
8-bitinternalRAM
8.32ProgrammableI/Olines
9.Two16-bittimer/counter
10.5InterruptSources
11.ProgrammableSerialChannel
12.Low-poweridleandpower-downmode
13.Chiposcillatorandclockcircuitry
ReferredtoasdigitalvoltagemeterDVM,itisadigitalmeasurementtechnology,thecontinuousanalog(DCinputvoltage)intoanon-continuous,discretedigitalformandtheinstrumentdisplay.
Thecharacteristicsofdigitalvoltagemeter:
1.Showaclearintuitive,accuratereadings
Traditionalanalogueinstrumentsthroughtheuseofindicatorsmustbecarriedoutanddialreadingsinthereadingprocesswillbeintroducedtotheinevitablehumanerror.Digitalvoltagemeteristheuseofadvanceddigitaldisplaytechnology,sothatthemeasurementresultsataglance,aslongasthemeterjumpphenomenondoesnotoccur,themeasurementresultsisunique.
2.Showthatthemedian
Showthatthemedianisusually31/2,32/3,33/4/spaces,41/2,43/4,51/2,61/2,71/2,81/2Atotalof9.Determinethemediannumberofinstrumentstherearetwoprinciples:
1.candisplayallthenumbers0to9aretheinteger-bit;
Score-bitnumericalvalueisbasedonthelargestshowthehighestnumberofelements,withthehighestnumberoffull-scaleasthedenominator.
3.Highaccuracy
Accuracyofresultsisameasureofsystematicerrorandrandomerroroftheintegrated.
4.Highresolution
Digitalvoltagemeteratthelowestvoltagerangeonthebottomofacharacterrepresentedbythevoltagevalue,knownastheinstrumentoftheresolution,whichreflectsthelevelofinstrumentsensitivity.Withthedisplayresolutionincreasesthemedian.Resolutionreferstothesmallestcanbeshowninthefigures(exceptzero)andthelargestpercentageofthenumber.Forexample,31/2DVMofaresolutionof1/1999≈0.05%.Benotedthattheresolutionandaccuracyaretwodifferentconcepts.Fromthemeasurementpointofview,theresolutionis"
true"
indicators(withmeasurementerrorhasnothingtodo),theaccuracyisthe"
real"
target(onbehalfofthesizeofmeasurementerror).
5.Widemeasuringrange
DVMgenerallymoremeasurablerange0~1000VDCvoltage,highvoltageprobecanbemeasuredwiththemillion-volthigh-pressure.
A/Dconverter[4]isadigitalvoltagemeter,digitalmultimeterandmeasuringsystemthe"
heart."
Atpresent,domesticproductionofA/Dconverterhasreachedhundredsofspeciescanbebroadlydividedintofivemaincategories:
1.monolithicA/Dconverter;
2.DMMdedicatedsingle-chipIC;
3.dedicatedmulti-displaymeterIC;
4.fordigitaltheuseofspecialinstrumentationIC(ASIC);
5.othergeneral-purposeA/Dconverter,thechipcanonlycompleteA/Dconverter,notdirectlywiththenumberofinstruments.
DigitalvoltagemeterdigitalmeterisagreatcoreandfoundationofthedigitalvoltagemeterasacontinuousanalogDCvoltagetoadiscreteformofnon-sequentialnumbers,whichisdifferentfromtraditionaldialindicatorreadingstoincreasethewaystoavoiderrorsinreadingandvisualfatigue.Atpresent,thedigitalmultimeterisacorecomponentoftheinternalA/Dconverter,converter,toalargeextentaffecttheaccuracyoftheaccuracyofthedesignofdigitalmultimeter-DigitalVoltageMeterA/DconverterforconvertinganalogsignalsADC0804input,AT89C51controlstheheartofthetransformationandprocessingtheresultsofoperations,thefinaloutputdevicedrivernumberofvoltagesignal.DigitalvoltagemeterdigitalmeterisagreatcoreandfoundationofthedigitalvoltagemeterasacontinuousanalogDCvoltagetoadiscreteformofnon-sequentialnumbers,whichisdifferentfromtraditionaldialindicatorreadingstoincreasethewaystoavoiderrorsinreadingandvisualfatigue.Atpresent,thedigitalmultimeterisacorecomponentoftheinternalA/Dconverter,converter,toalargeextentaffecttheaccuracyoftheaccuracyofthedesignofdigitalmultimeter-DigitalVoltageMeterA/DconverterforconvertinganalogsignalsADC0804input,AT89C51controlstheheartofthetransformationandprocessingtheresultsofoperations,thefinaloutputdevicedrivernumberofvoltagesignal.LEDdisplaycanbecarriedoutwillbedisplayedafterthedecimalpointvoltagevalueofone.
Adoptionofnewtechnologies,newprocesses,
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