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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F77 датащи(PDF) 49 Page - Holtek Semiconductor Inc |
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HT45F77 датащи(HTML) 49 Page - Holtek Semiconductor Inc |
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49 / 203 page  Rev. 1.20 �8 De�e��e� 1�� 201� Rev. 1.20 �9 De�e��e� 1�� 201� HT45F77 Body Fat Scale Flash MCU HT45F77 Body Fat Scale Flash MCU System Operation Modes Therearesixdifferentmodesofoperationforthemicrocontroller,eachonewithitsown specialcharacteristicsandwhichcanbechosenaccordingtothespecificperformanceand powerrequirementsoftheapplication.Therearetwomodesallowingnormaloperationofthe microcontroller,theNORMALModeandSLOWMode.Theremainingfourmodes,theSLEEP0, SLEEP1,IDLE0andIDLE1ModeareusedwhenthemicrocontrollerCPUisswitchedoffto conservepower. Operating Mode Description CPU fSYS fSUB fS NORMAL Mode on fH~fH/�� on on SLOW Mode on fSUB on on IDLE0 Mode off off on on/off IDLE1 Mode off on on on SLEEP0 Mode off off off off SLEEP1 Mode off off on on NORMAL Mode Asthenamesuggeststhisisoneofthemainoperatingmodeswherethemicrocontrollerhasallof itsfunctionsoperationalandwherethesystemclockisprovidedbyoneofthehighspeedoscillators. Thismodeoperatesallowingthemicrocontrollertooperatenormallywithaclocksourcewillcome fromoneofthehighspeedoscillators,eithertheHXTorHIRCoscillators.Thehighspeedoscillator willhoweverfirstbedividedbyaratiorangingfrom1to64,theactualratiobeingselectedbythe CKS2~CKS0andHLCLKbitsintheSMODregister.Althoughahighspeedoscillatorisused, runningthemicrocontrolleratadividedclockratioreducestheoperatingcurrent. SLOW Mode Thisisalsoamodewherethemicrocontrolleroperatesnormallyalthoughnowwithaslowerspeed clocksource.Theclocksourceusedwillbefromoneofthelowspeedoscillators,eithertheLXT ortheLIRC.Runningthemicrocontrollerinthismodeallowsittorunwithmuchloweroperating currents.IntheSLOWMode,thefHisoff. SLEEP0 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitinthe SMODregisterislow.IntheSLEEP0modetheCPUwillbestopped,andthefSUBandfSclocks willbestoppedtoo,andtheWatchdogTimerfunctionisdisabled.Inthismode,theLVDENismust clearedtozero.IftheLVDENissethigh,itwon’tentertheSLEEP0Mode. SLEEP1 Mode TheSLEEPModeisenteredwhenanHALTinstructionisexecutedandwhentheIDLENbitin theSMODregisterislow.IntheSLEEP1modetheCPUwillbestopped.HoweverthefSUBandfS clockswillcontinuetooperateiftheLVDENis"1"ortheWatchdogTimerfunctionisenabledand ifitsclocksourceischosenviaconfigurationoptiontocomefromthefSUB. |
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