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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F3W 데이터시트(PDF) 53 Page - Holtek Semiconductor Inc |
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HT45F3W 데이터시트(HTML) 53 Page - Holtek Semiconductor Inc |
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53 / 167 page  Rev. 1.50 5� De�e��e� 01� �01� Rev. 1.50 53 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU IDLE0 Mode TheIDLE0ModeisenteredwhenaHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerishighandtheFSYSONbitintheSMOD1registerislow.IntheIDLE0Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutsomeperipheralfunctionswillremain operationalsuchastheWatchdogTimer,TMs,LCDdriverandSPI.IntheIDLE0Mode,thesystem oscillatorwillbestopped.IntheIDLE0ModetheWatchdogTimerclock,fS,willeitherbeonor offdependinguponthefSclocksource.IfthesourceisfSYS/4thenthefSclockwillbeoff,andifthe sourcecomesfromfSUBthenfSwillbeon. IDLE1 Mode TheIDLE1ModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerishighandtheFSYSONbitintheSMOD1registerishigh.IntheIDLE1Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutmaycontinuetoprovideaclocksource tokeepsomeperipheralfunctionsoperationalsuchastheWatchdogTimer,TMs,LCDdriverand SPI.IntheIDLE1Mode,thesystemoscillatorwillcontinuetorun,andthissystemoscillatormay behighspeedorlowspeedsystemoscillator.IntheIDLE1ModetheWatchdogTimerclock,fS,will beon.IfthesourceisfSYS/4thenthefSclockwillbeon,andifthesourcecomesfromfSUBthenfS willbeon. Control Register Asingleregister,SMOD0,isusedforoverallcontroloftheinternalclockswithinthedevice. SMOD0 Register Bit 7 6 5 4 3 2 1 0 Na�e CKS� CKS1 CKS0 FSTEN LTO HTO IDLEN HLCLK R/W R/W R/W R/W R/W R R R/W R/W POR 0 0 0 0 0 0 1 1 Bit7~5 CKS2~CKS0:ThesystemclockselectionwhenHLCLKis“0” 000:fL(fLXTorfLIRC) 001:fL(fLXTorfLIRC) 010:fH/64 011:fH/32 100:fH/16 101:fH/8 110:fH/4 111:fH/2 Thesethreebitsareusedtoselectwhichclockisusedasthesystemclocksource.In additiontothesystemclocksource,whichcanbeeithertheLXTorLIRC,adivided versionofthehighspeedsystemoscillatorcanalsobechosenasthesystemclock source. Bit4 FSTEN:FastWake-upControl(onlyforHXT) 0:Disable 1:Enable ThisistheFastWake-upControlbitwhichdeterminesifthefSUBclocksourceis initiallyusedafterthedevicewakesup.Whenthebitishigh,thefSUBclocksourcecan beusedasatemporarysystemclocktoprovideafasterwakeuptimeasthefSUBclock isavailable. |
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