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HT45F4N bảng dữ liệu(PDF) 93 Page - Holtek Semiconductor Inc |
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HT45F4N bảng dữ liệu(HTML) 93 Page - Holtek Semiconductor Inc |
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93 / 170 page  Rev. 1.30 9� De�e��e� 1�� �01� Rev. 1.30 93 De�e��e� 1�� �01� HT45F4N/HT45FH4N Power Bank Flash MCU HT45F4N/HT45FH4N Power Bank Flash MCU IntheCompareMatchOutputMode,theTnIO1andTnIO0bitsdeterminehowthe TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA. TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresentstate whenacomparematchoccursfromtheComparatorA.Whenthesebitsarebothzero, thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutputpin shouldbesetupusingtheTnOCbit.NotethattheoutputlevelrequestedbytheTnIO1 andTnIO0bitsmustbedifferentfromtheinitialvaluesetupusingtheTnOCbit otherwisenochangewilloccurontheTMoutputpinwhenacomparematchoccurs. AftertheTMoutputpinchangesstateitcanberesettoitsinitiallevelbychangingthe leveloftheTnONbitfromlowtohigh. InthePWMMode,theTnIO1andTnIO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput functionismodifiedbychangingthesetwobits.Itisnecessarytochangethevalues oftheTnIO1andTnIO0bitsonlyaftertheTMhasbeenswitchedoff.Unpredictable PWMoutputswilloccuriftheTnIO1andTnIO0bitsarechangedwhentheTMis running. Bit3 TnOC:TPn_0,TPn_1Outputcontrolbit CompareMatchOutputMode 0:initiallow 1:initialhigh PWMMode/SinglePulseOutputMode 0:Activelow 1:Activehigh ThisistheoutputcontrolbitfortheTMoutputpin.Itsoperationdependsupon whetherTMisbeingusedintheCompareMatchOutputModeorinthePWMMode/ SinglePulseOutputMode.IthasnoeffectiftheTMisintheTimer/CounterMode.In theCompareMatchOutputModeitdeterminesthelogicleveloftheTMoutputpin beforeacomparematchoccurs.InthePWMModeitdeterminesifthePWMsignalis activehighoractivelow. Bit2 TnPOL:TPn_0,TPn_1OutputpolarityControl 0:non-invert 1:invert ThisbitcontrolsthepolarityoftheTPn_0,TPn_1outputpin.Whenthebitissethigh theTMoutputpinwillbeinvertedandnotinvertedwhenthebitiszero.Ithasno effectiftheTMisintheTimer/CounterMode. Bit1 TnCAPTS:TMncapturetriggersourceselect 0:FromTPn_0,TPn_1pin 1:FromTCKnpin Bit0 TnCCLR:SelectTMnCounterclearcondition 0:TMnComparatrorPmatch 1:TMnComparatrorAmatch Thisbitisusedtoselectthemethodwhichclearsthecounter.Rememberthatthe PeriodicTMcontainstwocomparators,ComparatorAandComparatorP,eitherof whichcanbeselectedtocleartheinternalcounter.WiththeTnCCLRbitsethigh, thecounterwillbeclearedwhenacomparematchoccursfromtheComparatorA. Whenthebitislow,thecounterwillbeclearedwhenacomparematchoccursfrom theComparatorPorwithacounteroverflow.Acounteroverflowclearingmethodcan onlybeimplementediftheCCRPbitsareallclearedtozero.TheTnCCLRbitisnot usedinthePWM,SinglePulseorInputCaptureMode. |
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