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Figure8–1A2-bitasynchronousbinarycounter.OpenfileF08-01toverifyoperation.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–1A2-bitasynch1Figure8–2TimingdiagramforthecounterofFigure8–1.Asinpreviouschapters,outputwaveformsareshowningreen.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–2Timingdiagram2Figure8–3Three-bitasynchronousbinarycounteranditstimingdiagramforonecycle.OpenfileF08-03toverifyoperation.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–3Three-bitasyn3Figure8–4Propagationdelaysina3-bitasynchronous(ripple-clocked)binarycounter.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–4Propagationde4Figure8–5Four-bitasynchronousbinarycounteranditstimingdiagram.OpenfileF08-05andverifytheoperation.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–5Four-bitasync5Figure8–6Anasynchronouslyclockeddecadecounterwithasynchronousrecycling.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–6Anasynchronou6Figure8–7Asynchronouslyclockedmodulus-12counterwithasynchronousrecycling.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–7Asynchronously7Figure8–8The74LS934-bitasynchronousbinarycounterlogicdiagram.(Pinnumbersareinparentheses,andallJandKinputsareinternally
connectedHIGH.)ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–8The74LS934-b8Figure8–9Twoconfigurationsofthe74LS93asynchronouscounter.(Thequalifyinglabel,CTRDIVn,indicatesacounterwithnstates.)ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–9Twoconfigurat9Figure8–1074LS93connectedasamodulus-12counter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–1074LS93connec10Figure8–11A2-bitsynchronousbinarycounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–11A2-bitsynch11Figure8–12Timingdetailsforthe2-bitsynchronouscounteroperation(thepropagationdelaysofbothflip-flopsareassumedtobeequal).ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–12Timingdetail12Figure8–13TimingdiagramforthecounterofFigure8–11.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–13Timingdiagra13Figure8–14A3-bitsynchronousbinarycounter.OpenfileF08-14toverifytheoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–14A3-bitsynch14Figure8–15TimingdiagramforthecounterofFigure8–14.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–15Timingdiagra15Figure8–16A4-bitsynchronousbinarycounterandtimingdiagram.PointswheretheANDgateoutputsareHIGHareindicatedbytheshaded
areas.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–16A4-bitsynch16Figure8–17AsynchronousBCDdecadecounter.OpenfileF08-17toverifyoperation.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–17Asynchronous17Figure8–18TimingdiagramfortheBCDdecadecounter(Q0istheLSB).ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–18Timingdiagra18Figure8–19The74HC1634-bitsynchronousbinarycounter.(ThequalifyinglabelCTRDIV16indicatesacounterwithsixteenstates.)ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–19The74HC163419Figure8–20Timingexamplefora74HC163.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–20Timingexampl20Figure8–21The74F162synchronousBCDdecadecounter.(ThequalifyinglabelCTRDIV10indicatesacounterwithtenstates.)ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–21The74F162sy21Figure8–22Timingexamplefora74F162.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–22Timingexampl22Figure8–23Abasic3-bitup/downsynchronouscounter.OpenfileF08-23toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–23Abasic3-bit23Figure8–24ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–24ThomasL.Floyd
Di24Figure8–25The74HC190up/downsynchronousdecadecounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–25The74HC190u25Figure8–26Timingexamplefora74HC190.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–26Timingexampl26Figure8–27Generalclockedsequentialcircuit.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–27Generalclock27Figure8–28Statediagramfora3-bitGraycodecounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–28Statediagram28Figure8–29ExamplesofthemappingprocedureforthecountersequencerepresentedinTable8–7andTable8–8.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–29Examplesoft29Figure8–30Karnaughmapsforpresent-stateJandKinputs.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–30Karnaughmaps30Figure8–31Three-bitGraycodecounter.OpenfileF08-31toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–31Three-bitGra31Figure8–32ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–32ThomasL.Floyd
Di32Figure8–33ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–33ThomasL.Floyd
Di33Figure8–34ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–34ThomasL.Floyd
Di34Figure8–35Statediagramfora3-bitup/downGraycodecounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–35Statediagram35Figure8–36
JandKmapsforTable8–11.Thecontrolinput,Y,istreatedasafourthvariable.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–36JandKmaps36Figure8–37Three-bitup/downGraycodecounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–37Three-bitup/37Figure8–38Twocascadedcounters(allJandKinputsareHIGH).ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–38Twocascaded38Figure8–39TimingdiagramforthecascadedcounterconfigurationofFigure8–38.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–39Timingdiagra39Figure8–40Amodulus-100counterusingtwocascadeddecadecounters.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–40Amodulus-10040Figure8–41Threecascadeddecadecountersformingadivide-by-1000frequencydividerwithintermediatedivide-by-10anddivide-by-100outputs.
ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–41Threecascade41Figure8–42ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–42ThomasL.Floyd
Di42Figure8–43Adivide-by-100counterusingtwo74F162decadecounters.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–43Adivide-by-143Figure8–44Adivide-by-40,000counterusing74HC1614-bitbinarycounters.Notethateachoftheparalleldatainputsisshowninbinaryorder(the
right-mostbitD0istheLSBineachcounter).ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–44Adivide-by-444Figure8–45Decodingofstate6(110).OpenfileF08-45toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–45Decodingofs45Figure8–46A3-bitcounterwithactive-HIGHdecodingofcount2andcount7.OpenfileF08-46toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–46A3-bitcount46Figure8–47Abasicdecade(BCD)counteranddecoder.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–47Abasicdecad47Figure8–48OutputswithglitchesfromthedecoderinFigure8–47.Glitchwidthsareexaggeratedforillustrationandareusuallyonlyafewnanosecondswide.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–48Outputswith48Figure8–49Thebasicdecadecounteranddecoderwithstrobingtoeliminateglitches.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–49Thebasicdec49Figure8–50StrobeddecoderoutputsforthecircuitofFigure8–49.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–50Strobeddecod50Figure8–51Simplifiedlogicdiagramfora12-hourdigitalclock.LogicdetailsusingspecificdevicesareshowninFigures8–52and8–53.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–51Simplifiedlo51Figure8–52Logicdiagramoftypicaldivide-by-60counterusing74F162synchronousdecadecounters.Notethattheoutputsareinbinaryorder(the
right-mostbitistheLSB).ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–52Logicdiagram52Figure8–53Logicdiagramforhourscounteranddecoders.Notethatonthecounterinputsandoutputs,theright-mostbitistheLSB.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–53Logicdiagram53Figure8–54Functionalblockdiagramforparkinggaragecontrol.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–54Functionalbl54Figure8–55Logicdiagramformodulus-100up/downcounterforautomobileparkingcontrol.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–55Logicdiagram55Figure8–56Parallel-to-serialdataconversionlogic.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–56Parallel-to-s56Figure8–57Exampleofparallel-to-serialconversiontimingforthecircuitinFigure8–56.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–57Exampleofpa57Figure8–58The74HC1634-bitsynchronouscounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–58The74HC163458Figure8–59Exampleofafailurethataffectsfollowingcountersinacascadedarrangement.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–59Exampleofa59Figure8–60Exampleofafailureinacascadedcounterwithatruncatedsequence.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–60Exampleofa60Figure8–61ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–61ThomasL.Floyd
Di61Figure8–62ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–62ThomasL.Floyd
Di62Figure8–63Trafficlightcontrolsystemblockdiagram.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–63Trafficlight63Figure8–64Sequenceoftrafficlightstates.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–64Sequenceoft64Figure8–65Blockdiagramofthesequentiallogic.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–65Blockdiagram65Figure8–66Statediagramforthetrafficlightcontrolsystem.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–66Statediagram66Figure8–67Sequentiallogicdiagram.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–67Sequentiallo67Figure8–68Inputlogicforthe2-bitGraycodecounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–68Inputlogicf68Figure8–69Thesequentiallogic.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–69Thesequentia69Figure8–70Blockdiagramofthecompletetrafficlightcontrolsystem.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–70Blockdiagram70Figure8–71Comparisonofasynchronousandsynchronouscounters.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–71Comparisonof71Figure8–72Notethatthelabels(namesofinputsandoutputs)areconsistentwithtextbutmaydifferfromtheparticularmanufacturer’sdatabook
youareusing.ThedevicesshownarefunctionallythesameandpincompatiblewiththesamedevicetypesinotheravailableCMOSandTTLICfamilies.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–72Notethatthe72Figure8–73ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–73ThomasL.Floyd
Di73Figure8–74ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–74ThomasL.Floyd
Di74Figure8–75ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–75ThomasL.Floyd
Di75Figure8–76ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–76ThomasL.Floyd
Di76Figure8–77ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–77ThomasL.Floyd
Di77Figure8–78ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–78ThomasL.Floyd
Di78Figure8–79ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–79ThomasL.Floyd
Di79Figure8–80ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–80ThomasL.Floyd
Di80Figure8–81ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–81ThomasL.Floyd
Di81Figure8–82ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–82ThomasL.Floyd
Di82Figure8–83ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–83ThomasL.Floyd
Di83Figure8–84ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–84ThomasL.Floyd
Di84Figure8–85ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–85ThomasL.Floyd
Di85Figure8–86ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–86ThomasL.Floyd
Di86Figure8–87ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–87ThomasL.Floyd
Di87Figure8–88ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–88ThomasL.Floyd
Di88Figure8–89ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–89ThomasL.Floyd
Di89Figure8–90ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–90ThomasL.Floyd
Di90Figure8–91ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–91ThomasL.Floyd
Di91Figure8–92ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–92ThomasL.Floyd
Di92Figure8–93ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–93ThomasL.Floyd
Di93Figure8–94ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–94ThomasL.Floyd
Di94Figure8–1A2-bitasynchronousbinarycounter.OpenfileF08-01toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–1A2-bitasynch95Figure8–2TimingdiagramforthecounterofFigure8–1.Asinpreviouschapters,outputwaveformsareshowningreen.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
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Allrightsreserved.可编辑课件Figure8–2Timingdiagram96Figure8–3Three-bitasynchronousbinarycounteranditstimingdiagramforonecycle.OpenfileF08-03toverifyoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–3Three-bitasyn97Figure8–4Propagationdelaysina3-bitasynchronous(ripple-clocked)binarycounter.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–4Propagationde98Figure8–5Four-bitasynchronousbinarycounteranditstimingdiagram.OpenfileF08-05andverifytheoperation.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–5Four-bitasync99Figure8–6Anasynchronouslyclockeddecadecounterwithasynchronousrecycling.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–6Anasynchronou100Figure8–7Asynchronouslyclockedmodulus-12counterwithasynchronousrecycling.ThomasL.Floyd
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Allrightsreserved.可编辑课件Figure8–7Asynchronously101Figure8–8The74LS934-bitasynchronousbinarycounterlogicdiagram.(Pinnumbersareinparentheses,andallJandKinputsareinternally
connectedHIGH.)ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
UpperSaddleRiver,NewJersey07458
Allrightsreserved.可编辑课件Figure8–8The74LS934-b102Figure8–9Twoconfigurationsofthe74LS93asynchronouscounter.(Thequalifyinglabel,CTRDIVn,indicatesacounterwithnstates.)ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
UpperSaddleRiver,NewJersey07458
Allrightsreserved.可编辑课件Figure8–9Twoconfigurat103Figure8–1074LS93connectedasamodulus-12counter.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
UpperSaddleRiver,NewJersey07458
Allrightsreserved.可编辑课件Figure8–1074LS93connec104Figure8–11A2-bitsynchronousbinarycounter.ThomasL.Floyd
DigitalFundamentals,9eCopyright©2006byPearsonEducation,Inc.
UpperSaddleRiver,NewJersey
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