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HT45FM2C 데이터시트(PDF) 35 Page - Holtek Semiconductor Inc

부품명 HT45FM2C
상세설명  Brushless DC Motor Flash Type 8-Bit MCU
PDF  171 Pages
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45FM2C 데이터시트(HTML) 35 Page - Holtek Semiconductor Inc

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Rev. 1.10
�4
�a� �0� �01�
Rev. 1.10
�5
�a� �0� �01�
HT45FM2C
Brushless DC Motor Flash Type 8-Bit MCU
HT45FM2C
Brushless DC Motor Flash Type 8-Bit MCU
Preliminar�
Oscillator
Variousoscillatoroptionsoffertheuserawiderangeoffunctionsaccordingtotheirvarious
applicationrequirements.Theflexiblefeaturesoftheoscillatorfunctionsensurethatthebest
optimisationcanbeachievedintermsofspeedandpowersaving.Oscillatorselectionsandoperation
areselectedthroughacombinationofconfigurationoptionsandregisters.
Oscillator Overview
Inadditiontobeingthesourceofthemainsystemclocktheoscillatorsalsoprovideclocksources
fortheWatchdogTimerandTimeBaseInterrupt.Fullyintegratedinternaloscillators,requiringno
externalcomponents,areprovidedtoformawiderangeofbothfastandslowsystemoscillators.
Thehigherfrequencyoscillatorprovideshigherperformancebutcarrywithitthedisadvantageof
higherpowerrequirements,whiletheoppositeisofcoursetrueforthelowerfrequencyoscillators.
Withthecapabilityofdynamicallyswitchingbetweenfastandslowsystemclock,thisdevicehave
theflexibilitytooptimizetheperformance/powerratio,afeatureespeciallyimportantinpower
sensitiveportableapplications.
Type
Name
Freq.
Internal High Speed RC
HIRC
�0�Hz
Internal Low Speed RC
LIRC
��kHz
Oscillator Types
System Clock Configurations
Therearetwomethodsofgeneratingthesystemclock,ahighspeedoscillatorandalowspeed
oscillator.Thehighspeedoscillatoristheinternal20MHzRCoscillator.Thelowspeedoscillatoris
theinternal32kHzRCoscillator.Selectingwhethertheloworhighspeedoscillatorisusedasthe
systemoscillatorisimplementedusingtheHLCLKbitandCKS2~CKS0bitsintheSMODregister
andasthesystemclockcanbedynamicallyselected.
HIRC
LIRC
High Speed
Oscillation
Low Speed
Oscillation
fH
fH/64
fH/32
fH/16
fH/8
fH/4
fH/2
6-stage Prescaler
fL
fSUB
fSYS
HLCLK,
CKS2~CKS0 bits
System Clock Configurations



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