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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F65 датащи(PDF) 91 Page - Holtek Semiconductor Inc |
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HT45F65 датащи(HTML) 91 Page - Holtek Semiconductor Inc |
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91 / 231 page  Rev. 1.60 90 �ove��e� ��� �01� Rev. 1.60 91 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU Timer Modules – TM Oneofthemostfundamentalfunctionsinanymicrocontrollerdeviceistheabilitytocontroland measuretime.ToimplementtimerelatedfunctionseachdeviceincludesseveralTimerModules, abbreviatedtothenameTM.TheTMsaremulti-purposetimingunitsandservetoprovide operationssuchasTimer/Counter,InputCapture,CompareMatchOutputandSinglePulseOutput aswellasbeingthefunctionalunitforthegenerationofPWMsignals.EachoftheTMshaseither twoorthreeindividualinterrupts.TheadditionofinputandoutputpinsforeachTMensuresthat usersareprovidedwithtimingunitswithawideandflexiblerangeoffeatures. ThecommonfeaturesofthedifferentTMtypesaredescribedherewithmoredetailedinformation providedintheindividualCompact,StandardandEnhancedTMsections. Introduction ThedevicescontainfourTMswitheachTMhavingareferencenameofTM0,TM1,TM2andTM3. EachindividualTMcanbecategorisedasacertaintype,namelyCompactTypeTM,StandardType TMorEnhancedTypeTM.Althoughsimilarinnature,thedifferentTMtypesvaryintheirfeature complexity.ThecommonfeaturestoalloftheCompact,StandardandEnhancedTMswillbe describedinthissection,thedetailedoperationregardingeachoftheTMtypeswillbedescribedin separatesections.ThemainfeaturesanddifferencesbetweenthethreetypesofTMsaresummarised intheaccompanyingtable. Function CTM STM ETM Ti�e�/Counte� √ √ √ I/P Captu�e — √ √ Co�pa�e Match Output — √ √ PWM Channels 1 1 � Single Pulse Output — 1 � PWM Align�ent Edge Edge Edge & Cent�e PWM Adjust�ent Pe�iod & Duty Duty o� Pe�iod Duty o� Pe�iod Duty o� Pe�iod TM Function Summary ThischipcontainsaspecificnumberofeitherCompactType,StandardTypeandEnhancedType TMunitswhichareshowninthetabletogetherwiththeirindividualreferencename,TM0~TM3. Device TM0 TM1 TM2 TM3 HT��F6� 10-�it CTM 10-�it CTM 16-�it STM — HT��F66/HT��F67 10-�it CTM 10-�it ETM 16-�it STM 10-�it CTM TM Name/Type Reference TM Operation ThethreedifferenttypesofTMofferadiverserangeoffunctions,fromsimpletimingoperations toPWMsignalgeneration.ThekeytounderstandinghowtheTMoperatesistoseeitintermsof afreerunningcounterwhosevalueisthencomparedwiththevalueofpre-programmedinternal comparators.Whenthefreerunningcounterhasthesamevalueasthepre-programmedcomparator, knownasacomparematchsituation,aTMinterruptsignalwillbegeneratedwhichcanclearthe counterandperhapsalsochangetheconditionoftheTMoutputpin.TheinternalTMcounteris drivenbyauserselectableclocksource,whichcanbeaninternalclockoranexternalpin. |
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