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HT66F319 Datasheet(PDF) 71 Page - Holtek Semiconductor Inc |
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HT66F319 Datasheet(HTML) 71 Page - Holtek Semiconductor Inc |
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71 / 185 page  Rev. 1.20 70 De�e��e� 0�� 201� Rev. 1.20 71 De�e��e� 0�� 201� HT66F319 Enhanced A/D Flash MCU with EEPROM and UART HT66F319 Enhanced A/D Flash MCU with EEPROM and UART functionismodifiedbychangingthesetwobits.Itisnecessarytoonlychangethe valuesoftheTnIO1andTnIO0bitsonlyaftertheTMnhasbeenswitchedoff. UnpredictablePWMoutputswilloccuriftheTnIO1andTnIO0bitsarechangedwhen theTMisrunning. Bit3 TnOC:TPnOutputcontrolbit CompareMatchOutputMode 0:Initiallow 1:Initialhigh PWMMode 0:Activelow 1:Activehigh ThisistheoutputcontrolbitfortheTMoutputpin.Itsoperationdependsupon whetherTMisbeingusedintheCompareMatchOutputModeorinthePWMMode. IthasnoeffectiftheTMisintheTimer/CounterMode.IntheCompareMatchOutput ModeitdeterminesthelogicleveloftheTMoutputpinbeforeacomparematch occurs.InthePWMModeitdeterminesifthePWMsignalisactivehighoractive low. Bit2 TnPOL:TPnOutputpolarityControl 0:Non-invert 1:Invert ThisbitcontrolsthepolarityoftheTPnoutputpin.WhenthebitissethightheTM outputpinwillbeinvertedandnotinvertedwhenthebitiszero.Ithasnoeffectifthe TMisintheTimer/CounterMode. Bit1 TnDPX:TMnPWMperiod/dutyControl 0:CCRP-period;CCRA-duty 1:CCRP-duty;CCRA-period Thisbit,determineswhichoftheCCRAandCCRPregistersareusedforperiodand dutycontrolofthePWMwaveform. Bit0 TnCCLR:SelectTMnCounterclearcondition 0:TMnComparatrorPmatch 1:TMnComparatrorAmatch Thisbitisusedtoselectthemethodwhichclearsthecounter.Rememberthatthe CompactTMcontainstwocomparators,ComparatorAandComparatorP,eitherof whichcanbeselectedtocleartheinternalcounter.WiththeTnCCLRbitsethigh, thecounterwillbeclearedwhenacomparematchoccursfromtheComparatorA. Whenthebitislow,thecounterwillbeclearedwhenacomparematchoccursfrom theComparatorPorwithacounteroverflow.Acounteroverflowclearingmethodcan onlybeimplementediftheCCRPbitsareallclearedtozero.TheTnCCLRbitisnot usedinthePWMMode. TMnDL Register (n=2) Bit 7 6 5 4 3 2 1 0 Na�e D7 D� D� D4 D3 D2 D1 D0 R/W R R R R R R R R POR 0 0 0 0 0 0 0 0 Bit7~0 D7~D0:TMnCounterLowByteRegisterbit7~bit0 TMn16-bitCounterbit7~bit0 |
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