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HT46R002 датащи(PDF) 63 Page - Holtek Semiconductor Inc

номер детали HT46R002
подробное описание детали  Cost-Effective A/D 8-Bit OTP MCU
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46R002 датащи(HTML) 63 Page - Holtek Semiconductor Inc

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Rev. 1.21
62
April 11, 2017
Rev. 1.21
63
April 11, 2017
HT46R002/HT46R003
Cost-Effective A/D 8-Bit OTP MCU
HT46R002/HT46R003
Cost-Effective A/D 8-Bit OTP MCU
Instruction Set
Introduction
Centraltothesuccessfuloperationofanymicrocontrollerisitsinstructionset,whichisasetof
programinstructioncodesthatdirectsthemicrocontrollertoperformcertainoperations.Inthecase
ofHoltekmicrocontroller,acomprehensiveandflexiblesetofover60instructionsisprovidedto
enableprogrammerstoimplementtheirapplicationwiththeminimumofprogrammingoverheads.
Foreasierunderstandingofthevariousinstructioncodes,theyhavebeensubdividedintoseveral
functionalgroupings.
Instruction Timing
Mostinstructionsareimplementedwithinoneinstructioncycle.Theexceptionstothisarebranch,
call,ortablereadinstructionswheretwoinstructioncyclesarerequired.Oneinstructioncycleis
equalto4systemclockcycles,thereforeinthecaseofan8MHzsystemoscillator,mostinstructions
wouldbeimplementedwithin0.5μsandbranchorcallinstructionswouldbeimplementedwithin
1μs.Althoughinstructionswhichrequireonemorecycletoimplementaregenerallylimitedto
theJMP,CALL,RET,RETIandtablereadinstructions,itisimportanttorealizethatanyother
instructionswhichinvolvemanipulationoftheProgramCounterLowregisterorPCLwillalsotake
onemorecycletoimplement.AsinstructionswhichchangethecontentsofthePCLwillimplya
directjumptothatnewaddress,onemorecyclewillberequired.Examplesofsuchinstructions
wouldbe“CLRPCL”or“MOVPCL,A”.Forthecaseofskipinstructions,itmustbenotedthatif
theresultofthecomparisoninvolvesaskipoperationthenthiswillalsotakeonemorecycle,ifno
skipisinvolvedthenonlyonecycleisrequired.
Moving and Transferring Data
Thetransferofdatawithinthemicrocontrollerprogramisoneofthemostfrequentlyused
operations.MakinguseofthreekindsofMOVinstructions,datacanbetransferredfromregistersto
theAccumulatorandvice-versaaswellasbeingabletomovespecificimmediatedatadirectlyinto
theAccumulator.Oneofthemostimportantdatatransferapplicationsistoreceivedatafromthe
inputportsandtransferdatatotheoutputports.
Arithmetic Operations
Theabilitytoperformcertainarithmeticoperationsanddatamanipulationisanecessaryfeatureof
mostmicrocontrollerapplications.WithintheHoltekmicrocontrollerinstructionsetarearangeof
addandsubtractinstructionmnemonicstoenablethenecessaryarithmetictobecarriedout.Care
mustbetakentoensurecorrecthandlingofcarryandborrowdatawhenresultsexceed255for
additionandlessthan0forsubtraction.TheincrementanddecrementinstructionsINC,INCA,DEC
andDECAprovideasimplemeansofincreasingordecreasingbyavalueofoneofthevaluesinthe
destinationspecified.


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Аналогичное описание - HT46R002

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