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HT45R4U датащи(PDF) 76 Page - Holtek Semiconductor Inc |
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HT45R4U датащи(HTML) 76 Page - Holtek Semiconductor Inc |
76 / 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 System Operating Modes Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe microcontroller,theNORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP0, SLEEP1,IDLE0andIDLE1ModeareusedwhenthemicrocontrollerCPUisswitchedoffto conservepower. Operating Mode Description CPU fSYS fSUB NOR�AL �ode On fH ~ fH/64 On SLOW �ode On fSUB On IDLE0 �ode Off Off On IDLE1 �ode Off On On SLEEP0 �ode Off Off Off SLEEP1 �ode Off Off On NORMAL Mode Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof itsfunctionsoperationalandwherethesystemclockisprovidedbyoneofthehighspeedoscillators. Thismodeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcome fromoneofthehighspeedoscillators,eithertheHXTorHIRCoscillators.Thehighspeedoscillator willhoweverfirstbedividedbyaratiorangingfrom1to64,theactualratiobeingselectedbythe CKS2~CKS0andHLCLKbitsintheSMODregister.Althoughahighspeedoscillatorisused, runningthemicrocontrolleratadividedclockratioreducestheoperatingcurrent. SLOW Mode Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslower speedclocksource.Theclocksourceusedwillbefromthelowspeedoscillator,LXT.Running themicrocontrollerinthismodeallowsittorunwithmuchloweroperatingcurrents.IntheSLOW Mode,thefHisoff. SLEEP0 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitin theSMODregisterislow.IntheSLEEP0modetheCPUwillbestopped,andthefSUBclockwill bestoppedtoo,andtheWatchdogTimerfunctionisdisabled.SincetheWDTfunctionisalways enabled,thisdevicewillnotentertheSLEEP0mode. SLEEP1 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMODregisterislow.IntheSLEEP1modetheCPUwillbestopped.However,thefSUBclockwill continuetooperateiftheWatchdogTimerfunctionisenabledasitsclocksourcecomesfromthefSUB. IDLE0 Mode TheIDLE0ModeisenteredwhenaHALTinstructionisexecutedandwhentheIDLENbitinthe SMODregisterishighandtheFSYSONbitintheSMOD1registerislow.IntheIDLE0Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutsomeperipheralfunctionswillremain operationalsuchastheWatchdogTimerandTimeBase.IntheIDLE0Mode,thesystemoscillator willbestopped.IntheIDLE0ModethefSUBclocksourcewillbestillon. |
Аналогичный номер детали - HT45R4U |
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Аналогичное описание - HT45R4U |
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