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HT45F4M Datasheet(PDF) 61 Page - Holtek Semiconductor Inc |
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HT45F4M Datasheet(HTML) 61 Page - Holtek Semiconductor Inc |
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61 / 138 page  Rev. 1.10 60 �an�a�� 1�� �01� Rev. 1.10 61 �an�a�� 1�� �01� HT45F4M Lithium Battery Backup Power ASSP MCU HT45F4M Lithium Battery Backup Power ASSP MCU Bit3 T0OC:TM0Outputcontrolbit CompareMatchOutputMode 0:initiallow 1:initialhigh PWMMode/SinglePulseOutputMode 0:Activelow 1:Activehigh ThisistheoutputcontrolbitfortheTMoutputpin.Itsoperationdependsupon whetherTMisbeingusedintheCompareMatchOutputModeorinthePWMMode/ SinglePulseOutputMode.IthasnoeffectiftheTMisintheTimer/CounterMode.In theCompareMatchOutputModeitdeterminesthelogicleveloftheTMoutputpin beforeacomparematchoccurs.InthePWMModeitdeterminesifthePWMsignalis activehighoractivelow. Bit2 T0POL:TM0OutputpolarityControl 0:non-invert 1:invert ThisbitcontrolsthepolarityoftheTMoutputpin.WhenthebitissethightheTM outputpinwillbeinvertedandnotinvertedwhenthebitiszero.Ithasnoeffectifthe TMisintheTimer/CounterMode. Bit1 T0DPX:TM0PWMperiod/dutyControl 0:CCRP-period;CCRA-duty 1:CCRP-duty;CCRA-period Thisbit,determineswhichoftheCCRAandCCRPregistersareusedforperiodand dutycontrolofthePWMwaveform. Bit0 T0CCLR:SelectTM0Counterclearcondition 0:TMComparatrorPmatch 1:TMComparatrorAmatch Thisbitisusedtoselectthemethodwhichclearsthecounter.Rememberthatthe StandardTMcontainstwocomparators,ComparatorAandComparatorP,eitherof whichcanbeselectedtocleartheinternalcounter.WiththeT0CCLRbitsethigh, thecounterwillbeclearedwhenacomparematchoccursfromtheComparatorA. Whenthebitislow,thecounterwillbeclearedwhenacomparematchoccursfrom theComparatorPorwithacounteroverflow.Acounteroverflowclearingmethodcan onlybeimplementediftheCCRPbitsareallclearedtozero.TheT0CCLRbitisnot usedinthePWM,SinglePulseorInputCaptureMode. TM0DL Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D� D4 D� D� D1 D0 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit7~0 TM0DL:TM0CounterLowByteRegisterbit7~bit0 TM16-bitCounterbit7~bit0 TM0DH Register Bit 7 6 5 4 3 2 1 0 Name D1� D14 D1� D1� D11 D10 D9 D8 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit7~0 TM0DH:TM0CounterHighByteRegisterbit7~bit0 TM16-bitCounterbit15~bit8 |
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