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HT45F65 Datasheet(PDF) 51 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 51 Page - Holtek Semiconductor Inc |
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51 / 231 page  Rev. 1.60 �0 �ove��e� ��� �01� Rev. 1.60 �1 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU IDLE1 Mode TheIDLE1ModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerishighandtheFSYSONbitintheSMOD1registerishigh.IntheIDLE1Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutmaycontinuetoprovideaclocksource tokeepsomeperipheralfunctionsoperationalsuchastheWatchdogTimer,TMs,LCDdriver,SPI1 andSIM.IntheIDLE1Mode,thesystemoscillatorwillcontinuetorun,andthissystemoscillator maybehighspeedorlowspeedsystemoscillator.IntheIDLE1ModetheWatchdogTimerclock, fS,willbeon.IfthesourceisfSYS/4thenthefSclockwillbeon,andifthesourcecomesfromfSUB thenfSwillbeon. Control Register Asingleregister,SMOD0,isusedforoverallcontroloftheinternalclockswithinthedevice. SMOD0 Register Bit 7 6 5 4 3 2 1 0 �a�e CKS� CKS1 CKS0 FSTE� LTO HTO IDLE� 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. Bit3 LTO:Lowspeedsystemoscillatorreadyflag 0:Notready 1:Ready Thisisthelowspeedsystemoscillatorreadyflagwhichindicateswhenthelowspeed systemoscillatorisstableafterpoweronresetorawake-uphasoccurred.Theflag willbelowwhenintheSLEEP0Modebutafterawake-uphasoccurred,theflagwill changetoahighlevelafter1024clockcyclesiftheLXToscillatorisusedand1~2 clockcyclesiftheLIRCoscillatorisused. |
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