 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
HT45F2002 Datasheet(PDF) 16 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT45F2002 Datasheet(HTML) 16 Page - Holtek Semiconductor Inc |
|
|
16 / 31 page  Rev. 1.00 1� ���� 1�� �01� Rev. 1.00 17 ���� 1�� �01� HT45F2002 2-Wire Communication Flash MCU HT45F2002 2-Wire Communication Flash 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.MakinguseofseveralkindsofMOVinstructions,datacanbetransferredfromregisters totheAccumulatorandvice-versaaswellasbeingabletomovespecificimmediatedatadirectly intotheAccumulator.Oneofthemostimportantdatatransferapplicationsistoreceivedatafrom theinputportsandtransferdatatotheoutputports. Arithmetic Operations Theabilitytoperformcertainarithmeticoperationsanddatamanipulationisanecessaryfeatureof mostmicrocontrollerapplications.WithintheHoltekmicrocontrollerinstructionsetarearangeof addandsubtractinstructionmnemonicstoenablethenecessaryarithmetictobecarriedout.Care mustbetakentoensurecorrecthandlingofcarryandborrowdatawhenresultsexceed255for additionandlessthan0forsubtraction.TheincrementanddecrementinstructionssuchasINC, INCA,DECandDECAprovideasimplemeansofincreasingordecreasingbyavalueofoneofthe valuesinthedestinationspecified. |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
