单片机科技论文Word下载.docx
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单片机科技论文Word下载.docx
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【abstract】single-chipmicrocomputerwithappropriateperipheraldevicesandapplications,consistsoftheapplicationsystembecometheminimumsystem.Thearticletothefrequencyconversioncontrolsystemofthesinglechipmicrocomputerbuffercircuitdesignisdiscussed.
【keywords】frequencyconversioncontrol;
Singlechipmicrocomputer;
Buffercircuit
ThisdesignUSESthechoicePHILIPSsemiconductorscompanywithmanualresetfunctionMAX708products.MAX708canalsomonitorthesecondpowersignal,astheprocessorprovidevoltagedropintowarningfunction,usingthisfunction,thesystemcanbeinpowersupplyfalltoresetbeforeperformingsomesafetyoperation,saveparameters,sendwarningsignalsorswitchingback-upbattery,etc.Inaddition,thesystemalsoexpandedtheprogrammableperipheralPSD303chip.BecausethesystemI/Omouthquantityandreal?
TheproductMAX708thatdesignstoadopttochoosePHILIPSthatthesemi-conductorcompaniestaketomovetoresetfunction.TheMAX708canalsokeepwatchonthesecondpowersignalandprovidetheelectricvoltagetheearly-warningfunctionfordroppingintoforprocessorandmakeuseofthisfunction,systemcanwhenthepowerdropintotocarryoutsomesafetyoperationsbeforeresetting,keepparameter,sendoutalertsignalorcutoversparebatteryetc..
Ontopofthat,thesystemexpandedprogrammableoutercirclechipPSD303.BecausetheIofsystem|theOamountstillhaveaverybigmarginwithactualamountneeded,pastthesystemexpandedtwoslicesof8255Asesagain,theonewasusedforconnectingakeyboardandshownelectriccircuit,theoneisusedforcontacttosendletternumber,andurgentparkingsignal...etc..
A,keyboardwithshowelectriccircuit
Designatthisin,establishanoperationelectriccircuitof9keystoreplacephysicallytheoperationbuttononthescene.6LEDsshowthatelectriccircuitisusedfortoshowtoturnsoon,electriccurrent,andadjusttotryofrelateditem'
sshowing.
Moreover,forthesakeofeasytothespotworkitestablished5×
sthen4ofmatrixtypekeyboard,usedforwhenthesystemsoftwarewaitstoappearamistake,butagaintheinconveniencedirectlycarryonmodifyingtotheprocedureofadjusttotryofuse.
Two,becomerepeatedlysystemdesign
Themodernbecomesrepeatedlyinthetechniqueandmainlyhas2kindstobecomerepeatedlytechnique:
Handover-keep-handovertobecomerepeatedlyatechniqueandhandover-handovertobecomerepeatedlyatechnique.Handover-keep-handovertobecomerepeatedlytechniqueforhandover-keep-handovertobecomerepeatedlyandadjustsoonsystemtoprovidetobecomerepeatedlythepower.Handover-keep-handovertobecomerepeatedlyconstituteelectriccircuithavealreadycommutatedelectriccircuitandnegativechangeelectriccircuittwoparts,commutateelectriccircuitworkrepeatedlythealternatecurrentcommutateintodirectcurrentandgoagainsttochangeelectriccircuitagaindirectcurrentnegativechangeintoadjustablefrequencyalternatecurrent.Accordingtobecomingrepeatedlythepropertyofthepowercanisdividedintoelectricvoltagetypeandelectriccurrenttypetobecomerepeatedly.
Thisdesignisusedandhandedover-handoverandbecomerepeatedlyelectriccircuitisanimpassabilityandleadinthecenterdirectcurrentlink,butbecomethebecomingofalternatecurrentofdifferentfrequencytothealternatecurrentofthechargedbarbedwirenetfixedfrequencydirecttransformationrepeatedlyelectriccircuit.Thiskindofbecomesrepeatedlytheelectriccircuitbeextensivelyappliedtothebigpoweralternatecurrentmotiveadjuststosoonspreadsystemandphysicallyuseofmainlyisthreemutuallyoutputtohandover-handovertobecomerepeatedlyelectriccircuit.Thecharacteristicsofthiskindofelectriccircuit:
(1)Becauseisadirecttransformation,havenointhecenterlink,socomparegeneraloftheinverterefficiencyhavetobehigh;
(2)Itisdirecttooutputelectricvoltagewithitsexchangesfromcommunicatethatsomepartsthatinputelectricvoltagewavewrapnetconstitute,asaresultitsexportationfrequencytheratioinputthefrequencyofACpowerlow,theexportationwaveformisalsogood;
(3)Becausebeinglimitedbychargedbarbedwirenetfrequency,usuallyoutputtingthefrequencyofelectricvoltageislower,orsofor1/3ofchargedbarbedwirenetfrequency;
(4)Thepowerfactorislower,especiallymuchlowerwhenthelowspeedcirculates,needadequacyrepair.
Threemutuallybecomerepeatedlyelectriccircuitmorethelistismutuallycomplicated,itselectriccircuitconnectsalinemethodtomainlyhavepublicexchangesmotherthelineisintothelinemethodandexportationtypecouplingmethod.Concretelysaycome,itlordelectriccircuitthepatternhave:
3zerotypeelectriccircuits,6separatetoloadabridgetypeelectriccircuit,6simproperleavetoloadabridgetypeofelectriccircuitand12bridgetypeselectriccircuitand3takethemiddlepointtriangleloadelectriccircuitand3wreathformseselectriccircuit.
Thisdesignsmoresimple1kindofchoice-3zerotypeelectriccircuits.
Three,thesynchronouselectriccircuitdesign
ThefunctionofsynchronouselectriccircuitBE,attoshouldofcrystalZhatubetheacceptanceisjustfacingthesunpoleelectricvoltageofbeginningstartapoint(namelycontrolstartingcountingofCapeαpoint)tosendoutaCPUcanidentifyiswhichsamealiketreadtheinterruptionpulseofsignalUtpiandthecontrolforαCapetocarryonpostponeofrequest,outputhomologousoftriggerpulse.Threehomologiestreadtheelectricvoltagesignalthroughthesynchronoustransformer,filterwave,steadypress,enlargetoinsulatetoconnectintorespectivelybehindwithoptoelectronicslistP2.5,P2.6andP2.7pinsesoftheslicemachine.Moreover,becauseofheredirectcurrentthepowerandtriggerelectriccircuitinthepowerusedcannottotallyuse,andtheoptoelectronicsOumatchamachineimportationtheexportationcarriesofthegroundcarrytocannottotallyuse,either,forthesakeofwithshowdifferentiation,theyofthesignallhaveadissimilarity.
Ua,UbandUcwithcancontrolHuomoduleofthreemutuallycommunicateelectricvoltagetogetherandmutually.Ua,UbandUcthroughR3,C3afterfilteringtheformtransformationlightOuofanelectriccircuitwaveinsulateorthopedicselectriccircuitoutputthreemutuallysquarewaveelectricvoltage,recordtocarryforKA,KBandKC,threemutuallysquarewavesendingtothe80C196respectivelylisttheP2people'
sP2.5,P2.6andP2.7oftheslicemachine.CPUjudgesthreeaccordingtothevalueofKA,KBandKCACpowermutuallyofmutually.
Four,triggerelectriccircuit
Inthedesign,threemutuallyelectriccircuitinmutuallyandallhaveeachtimetwosetsofpositiveandnegativecrystalZhatube,eachoneadoptsthreemutuallythehalfwavetypeconnectamethod,namelyeachusethreepipes,sototallyhave18crystalZhastotakecareof,so,triggeringthepulseshouldalsohave18roads.ThetriodetransistorVenlargestransistorforoutputstagepower;
Inordertoaccelerateelectriccapacity,theelectriccapacityCconstitutesdifferentialcalculuselectriccircuitwithR,canfollowbeforeraisingpulseofabruptdegree;
Forgiveattentiontobothanti-interferencetheabilityandpulseisex-tofollowanabruptdegree,generallytakeCto0.1μofF.Inordertoprotectpulsetransformer,mergeelectricresistanceRandestablishingofdiodeDelectriccircuitinthepulsetransformerbothends,thegeneralRresistivitytakesto1K.TheelectricresistanceRisaleaveelectricresistancetoload.Moreover,forthesakeofinsulateimportationoutputsignal,joinedoptoelectronicsOutomatchamachine,inconsiderationofshouldhaveenoughpulsestrengthtomakethecrystalZhatubeleadsandoutputpoletheelectricvoltageestablishto15Vs.Inthemiddleofsettingoutelectriccircuit,forgettingenoughpulsewidth,andmakingpulseex-tofollowasfaraspossibleabrupt,empressalongwithdescendquickly,soadoptedpulsetransformerT~T.Moreover,forattaininganelectricityinsulationfunction,aswelljoinedoptoelectronicstoaccidentallymatchamachine.Furthermore,foreasytolistslicethemachinecarryinthesynchronoustransformer1~18importationstothecontrolthattriggerselectriccircuitandledtogointourgentblockadersignalrespectively(fromHSO.0leadtogointo)with555infixedtimemachineconstituteofmanyXiesflaptoconcussmachinesignal,whilemanyXiesflapthecontrolsignalofconcussingthemachinethenfromlistHSOoftheslicemachine.Onecontrol.Thus,whentheelectricalengineeringinputsurgentparkingsignal,listslicethemachinepassitsHSO.0outputGaoDianPing,somaketotriggeranelectriccircuitimportationportoforthenon-doorbeblockaded,alsonamelyblockadedtobecometorepeatedlyequipoftriggerpulse,maketheelectricalengineeringquicklyparkthecar.
Five,theprotectionelectriccircuitdesign
Forraisingthecredibilityandsafetyofcontrolingthesystem,indesignandmovementcommunicatingelectricpowersystem,allhavetoinconsiderationofhaveoccurrencebreakdownanddon'
tworkasusualcircumstanceofpossibility.Atthreemutuallycommunicateelectricpowersystemin,themostfamiliarandthemostdangerousbreakdownismultiformshortcircuit,includethreeamongthemmutuallyshort-circuit,twomutuallyshort-circuit,onconnectingagroundofshortcircuitandelectricalengineeringandtransformeronmutuallyroundin
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