 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
HT45F75 데이터시트(PDF) 18 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT45F75 데이터시트(HTML) 18 Page - Holtek Semiconductor Inc |
|
|
18 / 190 page  Rev. 1.10 18 De�e��e� 1�� �01� Rev. 1.10 19 De�e��e� 1�� �01� HT45F75 Body Fat Scale Flash MCU HT45F75 Body Fat Scale Flash MCU Power-on Reset Characteristics Ta=�5°C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions VPOR VDD Sta�t Voltage to Ensu�e Powe�-on Reset — — — — 100 �V RRVDD VDD Raising Rate to Ensu�e Powe�-on Reset — — 0.035 — — V/�s tPOR Mini�u� Ti�e fo� VDD Stays at VPOR to Ensu�e Powe�-on Reset — — 1 — — �s Ti me V DD V PO R RR VD D t PO R System Architecture Akeyfactorinthehigh-performancefeaturesoftheHoltekrangeofmicrocontrollersisattributedto theirinternalsystemarchitecture.Therangeofthedevicetakeadvantageoftheusualfeaturesfound withinRISCmicrocontrollersprovidingincreasedspeedofoperationandenhancedperformance. Thepipeliningschemeisimplementedinsuchawaythatinstructionfetchingandinstruction executionareoverlapped,henceinstructionsareeffectivelyexecutedinoneortwocyclesformost ofthestandardorextendedinstructionsrespectively.Theexceptionstothisarebranchorcall instructionswhichneedonemorecycle.An8-bitwideALUisusedinpracticallyallinstructionset operations,whichcarriesoutarithmeticoperations,logicoperations,rotation,increment,decrement, branchdecisions,etc.TheinternaldatapathissimplifiedbymovingdatathroughtheAccumulator andtheALU.CertaininternalregistersareimplementedintheDataMemoryandcanbedirectly orindirectlyaddressed.Thesimpleaddressingmethodsoftheseregistersalongwithadditional architecturalfeaturesensurethataminimumofexternalcomponentsisrequiredtoprovidea functionalI/OandA/Dcontrolsystemwithmaximumreliabilityandflexibility.Thismakesthe devicesuitableforlow-cost,high-volumeproductionforcontrollerapplications. Clocking and Pipelining Themainsystemclock,derivedfromeitheraHXT,LXT,HIRCorLIRCoscillatorissubdivided intofourinternallygeneratednon-overlappingclocks,T1~T4.TheProgramCounterisincremented atthebeginningoftheT1clockduringwhichtimeanewinstructionisfetched.Theremaining T2~T4clockscarryoutthedecodingandexecutionfunctions.Inthisway,oneT1~T4clock cycleformsoneinstructioncycle.Althoughthefetchingandexecutionofinstructionstakesplace inconsecutiveinstructioncycles,thepipeliningstructureofthemicrocontrollerensuresthat instructionsareeffectivelyexecutedinoneinstructioncycle.Theexceptiontothisareinstructions wherethecontentsoftheProgramCounterarechanged,suchassubroutinecallsorjumps,inwhich casetheinstructionwilltakeonemoreinstructioncycletoexecute. |
|
링크 URL |
| ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크 투 데이터시트 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
