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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F5Q 데이터시트(PDF) 33 Page - Holtek Semiconductor Inc |
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HT45F5Q 데이터시트(HTML) 33 Page - Holtek Semiconductor Inc |
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33 / 114 page  Rev. 1.10 �� De�e��e� 1�� �01� Rev. 1.10 �� De�e��e� 1�� �01� HT45F5Q Charger Flash MCU HT45F5Q Charger Flash MCU Oscillator Variousoscillatoroptionsoffertheuserawiderangeoffunctionsaccordingtotheirvarious applicationrequirements.Theflexiblefeaturesoftheoscillatorfunctionsensurethatthebest optimisationcanbeachievedintermsofspeedandpowersaving.Oscillatorselectionsandoperation areselectedthroughregisters. Oscillator Overview Inadditiontobeingthesourceofthemainsystemclocktheoscillatorsalsoprovideclocksources fortheWatchdogTimerandTimeBaseInterrupts.Twofullyintegratedinternaloscillators,requiring noexternalcomponents,areprovidedtoformawiderangeofbothfastandslowsystemoscillators. Thehigherfrequencyoscillatorprovideshigherperformancebutcarrywithitthedisadvantageof higherpowerrequirements,whiletheoppositeisofcoursetrueforthelowerfrequencyoscillator. Withthecapabilityofdynamicallyswitchingbetweenfastandslowsystemclock,thisdevicehas theflexibilitytooptimizetheperformance/powerratio,afeatureespeciallyimportantinpower sensitiveportableapplications. Type Name Freq. Inte�nal High Speed RC HIRC 8MHz Inte�nal Low Speed RC LIRC ��kHz Oscillator Types System Clock Configurations Therearetwomethodsofgeneratingthesystemclock,ahighspeedoscillatorandalowspeed oscillator.Thehighspeedoscillatoristheinternal8MHzRCoscillator.Thelowspeedoscillatoris theinternal32kHzRCoscillator.Selectingwhethertheloworhighspeedoscillatorisusedasthe systemoscillatorisimplementedusingtheHLCLKbitandCKS2~CKS0bitsintheSMODregister andasthesystemclockcanbedynamicallyselected. HIRC P�es�ale� fH LIRC Low Speed Os�illation fH/� fH/1� fH/�4 fH/8 fH/4 fH/�� HLCLK CKS�~CKS0 �its fSYS fL High Speed Os�illation System Clock Configurations |
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