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HT45F65 Datasheet(PDF) 122 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 122 Page - Holtek Semiconductor Inc |
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122 / 231 page  Rev. 1.60 1�� �ove��e� ��� �01� Rev. 1.60 1�3 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU ThesetwobitsareusedtodeterminehowtheTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheTMisrunning. IntheCompareMatchOutputMode,theT1AIO1andT1AIO0bitsdeterminehow theTMoutputpinchangesstatewhenacomparematchoccursfromtheComparator A.TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutput pinshouldbesetupusingtheT1AOCbitintheTM1C1register.Notethattheoutput levelrequestedbytheT1AIO1andT1AIO0bitsmustbedifferentfromtheinitial valuesetupusingtheT1AOCbitotherwisenochangewilloccurontheTMoutputpin whenacomparematchoccurs.AftertheTMoutputpinchangesstate,itcanbereset toitsinitiallevelbychangingtheleveloftheT1ONbitfromlowtohigh. InthePWMMode,theT1AIO1andT1AIO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutputfunction ismodifiedbychangingthesetwobits.ItisnecessarytochangethevaluesoftheT1AIO1 andT1AIO0bitsonlyaftertheTMhasbeenswitchedoff.UnpredictablePWMoutputs willoccuriftheT1AIO1andT1AIO0bitsarechangedwhentheTMisrunning. Bit3 T1AOC:TP1AOutputcontrolbit CompareMatchOutputMode 0:Initiallow 1:Initialhigh PWMMode/SinglePulseOutputMode 0:Activelow 1:Activehigh ThisistheoutputcontrolbitfortheTMoutputpin.Itsoperationdependsupon whetherTMisbeingusedintheCompareMatchOutputModeorinthePWMMode/ SinglePulseOutputMode.IthasnoeffectiftheTMisintheTimer/CounterMode.In theCompareMatchOutputModeitdeterminesthelogicleveloftheTMoutputpin beforeacomparematchoccurs.InthePWMModeitdeterminesifthePWMsignalis activehighoractivelow. Bit2 T1APOL:TP1AOutputpolarityControl 0:Non-invert 1:Invert ThisbitcontrolsthepolarityoftheTP1Aoutputpin.WhenthebitissethightheTM outputpinwillbeinvertedandnotinvertedwhenthebitiszero.Ithasnoeffectifthe TMisintheTimer/CounterMode. Bit1 T1CDN:TM1Countercountupordownflag 0:Countup 1:Countdown Bit0 T1CCLR:SelectTM1Counterclearcondition 0:TM1ComparatorPmatch 1:TM1ComparatorAmatch Thisbitisusedtoselectthemethodwhichclearsthecounter.Rememberthat theEnhancedTMcontainsthreecomparators,ComparatorA,ComparatorBand ComparatorP,butonlyComparatorAorComparatorPcanbeselectedtoclearthe internalcounter.WiththeT1CCLRbitsethigh,thecounterwillbeclearedwhena comparematchoccursfromtheComparatorA.Whenthebitislow,thecounterwill beclearedwhenacomparematchoccursfromtheComparatorPorwithacounter overflow.AcounteroverflowclearingmethodcanonlybeimplementediftheCCRP bitsareallclearedtozero.TheT1CCLRbitisnotusedintheSinglePulseorInput CaptureMode. |
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