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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT69F360 데이터시트(PDF) 131 Page - Holtek Semiconductor Inc |
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HT69F360 데이터시트(HTML) 131 Page - Holtek Semiconductor Inc |
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131 / 235 page  Rev. 1.30 130 �ove��e� 1�� �01� Rev. 1.30 131 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM Capture Input Mode ToselectthismodebitsSTM1andSTM0intheSTMC1registershouldbesetto01respectively. Thismodeenablesexternalsignalstocaptureandstorethepresentvalueoftheinternalcounter andcanthereforebeusedforapplicationssuchaspulsewidthmeasurements.Theexternalsignalis suppliedontheSTPpin,whoseactiveedgecanbeeitherarisingedge,afallingedgeorbothrising andfallingedges;theactiveedgetransitiontypeisselectedusingtheSTIO1andSTIO0bitsin theSTMC1register.ThecounterisstartedwhentheSTONbitchangesfromlowtohighwhichis initiatedusingtheapplicationprogram. WhentherequirededgetransitionappearsontheSTPpinthepresentvalueinthecounterwillbe latchedintotheCCRAregistersandaTMinterruptgenerated.Irrespectiveofwhateventsoccuron theSTPpinthecounterwillcontinuetofreerununtiltheSTONbitchangesfromhightolow.When aCCRPcomparematchoccursthecounterwillresetbacktozero;inthiswaytheCCRPvalue canbeusedtocontrolthemaximumcountervalue.WhenaCCRPcomparematchoccursfrom ComparatorP,aTMinterruptwillalsobegenerated.Countingthenumberofoverflowinterrupt signalsfromtheCCRPcanbeausefulmethodinmeasuringlongpulsewidths.TheSTIO1and STIO0bitscanselecttheactivetriggeredgeontheSTPpintobearisingedge,fallingedgeorboth edgetypes.IftheSTIO1andSTIO0bitsarebothsethigh,thennocaptureoperationwilltakeplace irrespectiveofwhathappensontheSTPpin,howeveritmustbenotedthatthecounterwillcontinue torun. AstheSTPpinispinsharedwithotherfunctions,caremustbetakeniftheTMisintheInput CaptureMode.Thisisbecauseifthepinissetupasanoutput,thenanytransitionsonthispinmay causeaninputcaptureoperationtobeexecuted.TheSTCCLRandSTDPXbitsarenotusedinthis Mode. |
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