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HT67F5652 bảng dữ liệu(PDF) 76 Page - Holtek Semiconductor Inc |
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HT67F5652 bảng dữ liệu(HTML) 76 Page - Holtek Semiconductor Inc |
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76 / 224 page  Rev. 1.00 �� De�e��e� 0�� �01� Rev. 1.00 �� De�e��e� 0�� �01� HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU Timer Modules – TM Oneofthemostfundamentalfunctionsinanymicrocontrollerdeviceistheabilitytocontroland measuretime.ToimplementtimerelatedfunctionseachdeviceincludesseveralTimerModules, abbreviatedtothenameTM.TheTMsaremulti-purposetimingunitsandservetoprovide operationssuchasTimer/Counter,InputCapture,CompareMatchOutputandSinglePulseOutput aswellasbeingthefunctionalunitforthegenerationofPWMsignals.EachoftheTMshastwo individualinterrupts.TheadditionofinputandoutputpinsforeachTMensuresthatusersare providedwithtimingunitswithawideandflexiblerangeoffeatures. ThecommonfeaturesofthedifferentTMtypesaredescribedherewithmoredetailedinformation providedintheindividualCompact,PeriodicandStandardTMsections. Introduction ThedevicecontainsfourTMshavingareferencenameofTM0,TM1,TM2andTM3.Each individualTMcanbecategorisedasacertaintype,namelyCompactTypeTM,PeriodicType TMorStandardTypeTM.Althoughsimilarinnature,thedifferentTMtypesvaryintheirfeature complexity.ThecommonfeaturestoalloftheCompact,PeriodicandStandardTMswillbe describedinthissection;thedetailedoperationregardingeachoftheTMtypeswillbedescribedin separatesections.ThemainfeaturesanddifferencesbetweenthethreetypesofTMsaresummarised intheaccompanyingtable. Function CTM PTM STM Ti�e�/Counte� √ √ √ I/P Captu�e — √ √ Co�pa�e Mat�h Output √ √ √ PWM Channels 1 1 1 Single Pulse Output — 1 1 PWM Align�ent Edge Edge Edge PWM Adjust�ent Pe�iod & Duty Duty o� Pe�iod Duty o� Pe�iod Duty o� Pe�iod TM Function Summary TM0 TM1 TM2 TM3 10-�it CTM 10-�it PTM 10-�it PTM 1�-�it STM 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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