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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT46R002 датащи(PDF) 42 Page - Holtek Semiconductor Inc |
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HT46R002 датащи(HTML) 42 Page - Holtek Semiconductor Inc |
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42 / 83 page  Rev. 1.21 42 April 11, 2017 Rev. 1.21 43 April 11, 2017 HT46R002/HT46R003 Cost-Effective A/D 8-Bit OTP MCU HT46R002/HT46R003 Cost-Effective A/D 8-Bit OTP MCU In cr em en t Ti me r C ont ro ll er Pr e sca le r Ou t put Ti me r + 1 Ti me r + 2 Ti me r + NT im er + N + 1 Timer Mode Timing Chart Event Counter Mode Inthismode,anumberofexternallychanginglogicevents,occurringontheexternaltimerTMR pin,canberecordedbytheTimer/EventCounter.Tooperateinthismode,theOperatingMode Selectbitpair,T0M1/T0M0,intheTimerControlRegistermustbesettothecorrectvalueas shown. Bit7 Bit6 0 1 Control Register Operating Mode Select Bits for the Timer Mode Inthismode,theexternaltimerTMRpin,isusedastheTimer/EventCounterclocksource,however itisnotdividedbytheinternalprescaler.AftertheotherbitsintheTimerControlRegisterhavebeen set,theenablebitT0ON,whichisbit4oftheTimerControlRegister,canbesethightoenablethe Timer/EventCountertorun.IftheActiveEdgeSelectbit,T0EG,whichisbit3oftheTimerControl Register,islow,theTimer/EventCounterwillincrementeachtimetheexternaltimerpinreceivesa lowtohightransition.IftheT0EGishigh,thecounterwillincrementeachtimetheexternaltimer pinreceivesahightolowtransition.Whenitisfullandoverflows,aninterruptsignalisgenerated andtheTimer/EventCounterwillreloadthevaluealreadyloadedintothepreloadregisterand continuecounting.TheinterruptcanbedisabledbyensuringthattheTimer/EventCounterInterrupt EnablebitinthecorrespondingInterruptControlRegister.Itisresettozero. AstheexternaltimerpinissharedwithanI/Opin,toensurethatthepinisconfiguredtooperateas aneventcounterinputpin,twothingshavetohappen.ThefirstistoensurethattheOperatingMode SelectbitsintheTimerControlRegisterplacetheTimer/EventCounterintheEventCounting Mode.Thesecondistoensurethattheportcontrolregisterconfiguresthepinasaninput.Itshould benotedthatintheeventcountingmode,evenifthemicrocontrollerisintheSleepMode,the Timer/EventCounterwillcontinuetorecordexternallychanginglogiceventsonthetimerinput TMRpin.Asaresultwhenthetimeroverflowsitwillgenerateatimerinterruptandcorresponding wake-upsource. Ti me r+ 2 Ex te rn al E ve nt In cr em en t Ti me r C oun te r Ti me r+ 3 Ti me r+ 1 Event Counter Mode Timing Chart (T0EG=1) |
Аналогичный номер детали - HT46R002 |
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Аналогичное описание - HT46R002 |
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