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HT45R4U датащи(PDF) 77 Page - Holtek Semiconductor Inc |
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HT45R4U датащи(HTML) 77 Page - Holtek Semiconductor Inc |
77 / 105 page Rev. 1.10 76 �a��� 1�� �01� Rev. 1.10 77 �a��� 1�� �01� HT45R4U TinyPowerTM A/D Type e-Banking ASSP OTP MCU with LCD IDLE1 Mode TheIDLE1ModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMODregisterishighandtheFSYSONbitintheWDTCregisterishigh.IntheIDLE1Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutmaycontinuetoprovideaclocksource tokeepsomeperipheralfunctionsoperationalsuchastheTimers.IntheIDLE1Mode,thesystem oscillatorwillcontinuetorun,andthissystemoscillatormaybehighspeedorlowspeedsystem oscillator.IntheIDLE1ModethefSUBclocksourcewillbeon. Control Register Aregisterpair,SMODandSMOD1,isusedforoverallcontroloftheinternalclockswithinthedevice. SMOD Register Bit 7 6 5 4 3 2 1 0 Name 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:fSUB(fLXT) 001:fSUB(fLXT) 010:fH/64 011:fH/32 100:fH/16 101:fH/8 110:fH/4 111:fH/2 Thesethreebitsareusedtoselectwhichclockisusedasthesystemclocksource. Inadditiontothesystemclocksource,whichisderivedfromtheLXToscillator,a dividedversionofthehighspeedsystemoscillatorcanalsobechosenasthesystem clocksource. 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 changetoahighlevelafter1024clockcyclesastheLXToscillatorisused. Bit2 HTO:Highspeedsystemoscillatorreadyflag 0:Notready 1:Ready Thisisthehighspeedsystemoscillatorreadyflagwhichindicateswhenthehighspeed systemoscillatorisstable.Thisflagisclearedto"0"byhardwarewhenthedeviceis poweredonandthenchangestoahighlevelafterthehighspeedsystemoscillatoris stable.Thereforethisflagwillalwaysbereadas"1"bytheapplicationprogramafter devicepower-on.TheflagwillbelowwhenintheSLEEPorIDLE0Modebutafter awake-uphasoccurred,theflagwillchangetoahighlevelafter1024clockcyclesif theHXToscillatorisusedor15~16clockcyclesiftheHIRCoscillatorisused. |
Аналогичный номер детали - HT45R4U |
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Аналогичное описание - HT45R4U |
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