 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
HT45F39 데이터시트(PDF) 32 Page - Holtek Semiconductor Inc |
|
|
|||||||||||||||||||||||||||||
HT45F39 데이터시트(HTML) 32 Page - Holtek Semiconductor Inc |
|
|
32 / 102 page  Rev. 1.10 32 July 01, 2016 Rev. 1.10 33 July 01, 2016 HT45F39/HT45F391 Ultrasonic Distance Measurement 8-bit Flash MCU HT45F39/HT45F391 Ultrasonic Distance Measurement 8-bit Flash MCU Oscillators and Operating Modes Twointernaloscillatorsareprovided,onelowspeedandonehighspeed.Botharefullyintegrated andrequirenoexternalcomponentsfortheiroperation. Internal High Speed Oscillator – HIRC TheinternalRCoscillatorisafullyintegratedsystemoscillatorrequiringnoexternalcomponents. TheinternalRCoscillatorhasafixedfrequencyof16MHz.Devicetrimmingduringthe manufacturingprocessandtheinclusionofinternalfrequencycompensationcircuitsareusedto ensurethattheinfluenceofthepowersupplyvoltage,temperatureandprocessvariationsonthe oscillationfrequencyareminimized.Asaresult,atapowersupplyof5Vandatatemperaturefrom -20~60°C degrees,thefixedoscillationfrequency16MHzwillhaveatolerancewithin2%asit requiresnoexternalpinsforitsoperation. Internal Low Speed Oscillator – LIRC TheLIRCisafullyself-containedfreerunningon-chipRCoscillatorusedastheperipheralfunction clocksourcewithatypicalfrequencyof32kHzat5Vrequiringnoexternalcomponents.Whenthe devicesentertheSLEEP0/SLEEP1Mode,thesystemclockwillstoprunningbuttheWDToscillator continuestofree-runandtokeepthewatchdogactive. System Operation Modes Therearetwodifferentmodesforthemicrocontroller,eachonewithitsownspecialcharacteristicsand whichcanbechosenaccordingtothespecificperformanceandpowerrequirementsoftheapplication. Thereisonemodeallowingnormaloperationofthemicrocontroller,theNORMALMode.Theother mode,theSLEEPMode,isusedwhenthemicrocontrollerCPUisswitchedofftoconservepower. Operation Mode Description CPU HIRC LIRC NORMAL Mode On On On SLEEP Mode Off Off On NORMAL Mode Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof itsfunctionsoperationalandwherethesystemclockisprovidedbytheHIRCoscillator. SLEEP Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecuted.IntheSLEEPmodetheCPU willbestopped.However,theLIRCclockwillcontinuetooperatesincetheWatchdogTimer functionisalwaysenabled. Entering the SLEEP Mode ThereisonlyonewayforthedevicestoentertheSLEEPModeandthatistoexecutethe"HALT" instructionintheapplicationprogramandtheWDTon.Whenthisinstructionisexecutedunderthe conditionsdescribedabove,thefollowingwilloccur: • Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe"HALT" instruction,buttheWDTwillremainwiththeclocksourcecomingfromtheLIRCclock. • TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition. • TheWDTwillbeclearedandresumecountingastheWDTisenabled. • TheI/Oportswillmaintaintheirpresentconditions. • Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO, willbecleared. |
|
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
