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HT45F65 Datasheet(PDF) 50 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 50 Page - Holtek Semiconductor Inc |
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50 / 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 System Operation Modes Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe microcontroller,theNORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP0, SLEEP1,IDLE0andIDLE1ModeareusedwhenthemicrocontrollerCPUisswitchedoffto conservepower. Operating Mode Description CPU fSYS fSUB fS fTBC �ORMAL Mode on fH~fH/6� on on on SLOW Mode on fL on on/off on IDLE0 Mode off off on on on IDLE1 Mode off on on on on SLEEP0 Mode off off off off off SLEEP1 Mode off off on on off NORMAL Mode Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof itsfunctionsoperationalandwherethesystemclockisprovidedbyoneofthehighspeedoscillators. Thismodeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcome fromoneofthehighspeedoscillators,eithertheHXT,ERCorHIRCoscillators.Thehighspeed oscillatorwillhoweverfirstbedividedbyaratiorangingfrom1to64,theactualratiobeingselected bytheCKS2~CKS0andHLCLKbitsintheSMOD0register.Althoughahighspeedoscillatoris used,runningthemicrocontrolleratadividedclockratioreducestheoperatingcurrent. SLOW Mode Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslowerspeed clocksource.Theclocksourceusedwillbefromoneofthelowspeedoscillators,eithertheLXT ortheLIRC.Runningthemicrocontrollerinthismodeallowsittorunwithmuchloweroperating currents.IntheSLOWMode,thefHisoff. SLEEP0 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerislow.IntheSLEEP0modetheCPUwillbestopped,andthefSUBandfSclocks willbestoppedtoo,andtheWatchdogTimerfunctionisdisabled.Inthismode,theLVDENismust setto"0".IftheLVDENissetto"1",itwon’tentertheSLEEP0Mode. SLEEP1 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerislow.IntheSLEEP1modetheCPUwillbestopped.HoweverthefSUBandfS clockswillcontinuetooperateiftheLVDENis"1"ortheWatchdogTimerfunctionisenabledand ifitsclocksourceischosenviaconfigurationoptiontocomefromthefSUB. IDLE0 Mode TheIDLE0ModeisenteredwhenaHALTinstructionisexecutedandwhentheIDLENbitinthe SMOD0registerishighandtheFSYSONbitintheSMOD1registerislow.IntheIDLE0Modethe systemoscillatorwillbeinhibitedfromdrivingtheCPUbutsomeperipheralfunctionswillremain operationalsuchastheWatchdogTimer,TMs,LCDdriver,SPI1andSIM.IntheIDLE0Mode,the systemoscillatorwillbestopped.IntheIDLE0ModetheWatchdogTimerclock,fS,willeitherbe onoroffdependinguponthefSclocksource.IfthesourceisfSYS/4thenthefSclockwillbeoff,and ifthesourcecomesfromfSUBthenfSwillbeon. |
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