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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F3W датащи(PDF) 52 Page - Holtek Semiconductor Inc |
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HT45F3W датащи(HTML) 52 Page - Holtek Semiconductor Inc |
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52 / 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 System Operation Modes Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe microcontroller,theNORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP0, SLEEP1,IDLE0andIDLE1ModeareusedwhenthemicrocontrollerCPUisswitchedoffto conservepower. Operating Mode Description CPU fSYS fSUB fS fTBC NORMAL Mode on fH~fH/�4 on on on SLOW Mode on fL on on on IDLE0 Mode off off on on/off 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. |
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