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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F75 데이터시트(PDF) 97 Page - Holtek Semiconductor Inc |
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HT45F75 데이터시트(HTML) 97 Page - Holtek Semiconductor Inc |
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97 / 190 page  Rev. 1.10 9� De�e��e� 1�� �01� Rev. 1.10 97 De�e��e� 1�� �01� HT45F75 Body Fat Scale Flash MCU HT45F75 Body Fat Scale Flash MCU Capture Input Mode ToselectthismodebitsTnM1andTnM0inthePTMnC1registershouldbesetto01respectively. Thismodeenablesexternalsignalstocaptureandstorethepresentvalueoftheinternalcounter andcanthereforebeusedforapplicationssuchaspulsewidthmeasurements.Theexternalsignalis suppliedontheTPn_0,TPn_1orTCKnpin,selectedbytheTnCAPTSbitinthePTMnC1register. Theinputpinactiveedgecanbeeitherarisingedge,afallingedgeorbothrisingandfallingedges; theactiveedgetransitiontypeisselectedusingtheTnIO1andTnIO0bitsinthePTMnC1register. ThecounterisstartedwhentheTnONbitchangesfromlowtohighwhichisinitiatedusingthe applicationprogram. WhentherequirededgetransitionappearsontheTPn_0,TPn_1orTCKnpinthepresentvaluein thecounterwillbelatchedintotheCCRAregisterandaTMinterruptgenerated.Irrespectiveof whateventsoccurontheTPn_0,TPn_1orTCKnpinthecounterwillcontinuetofreerununtilthe TnONbitchangesfromhightolow.WhenaCCRPcomparematchoccursthecounterwillreset backtozero;inthiswaytheCCRPvaluecanbeusedtocontrolthemaximumcountervalue.When aCCRPcomparematchoccursfromComparatorP,aTMinterruptwillalsobegenerated.Counting thenumberofoverflowinterruptsignalsfromtheCCRPcanbeausefulmethodinmeasuringlong pulsewidths.TheTnIO1andTnIO0bitscanselecttheactivetriggeredgeontheTPn_0,TPn_1 orTCKnpintobearisingedge,fallingedgeorbothedgetypes.IftheTnIO1andTnIO0bitsare bothsethigh,thennocaptureoperationwilltakeplaceirrespectiveofwhathappensontheTPn_0, TPn_1orTCKnpin,howeveritmustbenotedthatthecounterwillcontinuetorun. AstheTPn_0,TPn_1orTCKnpinispinsharedwithotherfunctions,caremustbetakeniftheTMn isintheCaptureInputMode.Thisisbecauseifthepinissetupasanoutput,thenanytransitionson thispinmaycauseaninputcaptureoperationtobeexecuted.TheTnCCLR,TnOCandTnPOLbits arenotusedinthisMode. |
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