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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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HT45F4N bảng dữ liệu(PDF) 98 Page - Holtek Semiconductor Inc |
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HT45F4N bảng dữ liệu(HTML) 98 Page - Holtek Semiconductor Inc |
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98 / 170 page  Rev. 1.30 98 De�e��e� 1�� �01� Rev. 1.30 99 De�e��e� 1�� �01� HT45F4N/HT45FH4N Power Bank Flash MCU HT45F4N/HT45FH4N Power Bank Flash MCU Timer/Counter Mode Toselectthismode,bitsTnM1andTnM0intheTMnC1registershouldallbesetto11respectively. TheTimer/CounterModeoperatesinanidenticalwaytotheCompareMatchOutputMode generatingthesameinterruptflags.TheexceptionisthatintheTimer/CounterModetheTMoutput pinisnotused.ThereforetheabovedescriptionandTimingDiagramsfortheCompareMatch OutputModecanbeusedtounderstanditsfunction.AstheTMoutputpinisnotusedinthismode, thepincanbeusedasanormalI/Opinorotherpin-sharedfunction. PWM Output Mode Toselectthismode,bitsTnM1andTnM0intheTMnC1registershouldbesetto10respectively 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.TheTnOCbitintheTMnC1registerisusedto selecttherequiredpolarityofthePWMwaveformwhilethetwoTnIO1andTnIO0bitsareusedto enablethePWMoutputortoforcetheTMoutputpintoafixedhighorlowlevel.TheTnPOLbitis usedtoreversethepolarityofthePWMoutputwaveform. 10-bit PTM, PWM Mode CCRP 1~1023 0 Pe�iod 1~10�3 10�� Duty CCRA IffH=30MHz,TMclocksourceselectfH,CCRP=200andCCRA=50, ThePTMPWMoutputfrequency=(fH)/200=30MHz/200=150kHz,duty=50/200=25% IftheDutyvaluedefinedbytheCCRAregisterisequaltoorgreaterthanthePeriodvalue,thenthe PWMoutputdutyis100%. |
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