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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F75 데이터시트(PDF) 93 Page - Holtek Semiconductor Inc |
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HT45F75 데이터시트(HTML) 93 Page - Holtek Semiconductor Inc |
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93 / 190 page  Rev. 1.10 9� De�e��e� 1�� �01� Rev. 1.10 93 De�e��e� 1�� �01� HT45F75 Body Fat Scale Flash MCU HT45F75 Body Fat Scale Flash MCU Timer/Counter Mode Toselectthismode,bitsTnM1andTnM0inthePTMnC1registershouldallbesetto11 respectively.TheTimer/CounterModeoperatesinanidenticalwaytotheCompareMatchOutput Modegeneratingthesameinterruptflags.TheexceptionisthatintheTimer/CounterModethe TMoutputpinisnotused.ThereforetheabovedescriptionandTimingDiagramsfortheCompare MatchOutputModecanbeusedtounderstanditsfunction.AstheTMoutputpinisnotusedinthis mode,thepincanbeusedasanormalI/Opinorotherpin-sharedfunction. PWM Output Mode Toselectthismode,bitsTnM1andTnM0inthePTMnC1registershouldbesetto10respectively andalsotheTnIO1andTnIO0bitsshouldbesetto10respectively.ThePWMfunctionwithin theTMisusefulforapplicationswhichrequirefunctionssuchasmotorcontrol,heatingcontrol, illuminationcontroletc.Byprovidingasignaloffixedfrequencybutofvaryingdutycycleonthe TMoutputpin,asquarewaveACwaveformcanbegeneratedwithvaryingequivalentDCRMS values. AsboththeperiodanddutycycleofthePWMwaveformcanbecontrolled,thechoiceofgenerated waveformisextremelyflexible.InthePWMmode,theTnCCLRbithasnoeffectasthePWM period.BothoftheCCRPandCCRAregistersareusedtogeneratethePWMwaveform,oneregister isusedtocleartheinternalcounterandthuscontrolthePWMwaveformfrequency,whiletheother oneisusedtocontrolthedutycycle.ThePWMwaveformfrequencyanddutycyclecantherefore becontrolledbythevaluesintheCCRAandCCRPregisters. Aninterruptflag,oneforeachoftheCCRAandCCRP,willbegeneratedwhenacomparematch occursfromeitherComparatorAorComparatorP.TheTnOCbitinthePTMnC1registerisusedto selecttherequiredpolarityofthePWMwaveformwhilethetwoTnIO1andTnIO0bitsareusedto enablethePWMoutputortoforcetheTMoutputpintoafixedhighorlowlevel.TheTnPOLbitis usedtoreversethepolarityofthePWMoutputwaveform. • 10-bit PTM, PWM Mode CCRP 0 1~1023 Pe�iod 10�� 1~10�3 Duty CCRA IffSYS=16MHz,TMclocksourceselectfSYS/4,CCRP=100bandCCRA=128, ThePTMPWMoutputfrequency=(fSYS/4)/512=fSYS/2048=7.8125kHz,duty=128/512=25%, IftheDutyvaluedefinedbytheCCRAregisterisequaltoorgreaterthanthePeriodvalue,thenthe PWMoutputdutyis100%. |
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