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HT45F75 Datasheet(PDF) 76 Page - Holtek Semiconductor Inc |
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HT45F75 Datasheet(HTML) 76 Page - Holtek Semiconductor Inc |
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76 / 190 page  Rev. 1.10 7� De�e��e� 1�� �01� Rev. 1.10 77 De�e��e� 1�� �01� HT45F75 Body Fat Scale Flash MCU HT45F75 Body Fat Scale Flash MCU outputpinwillberesettoitsinitialcondition,asspecifiedbytheTnOCbit,whenthe TnONbitchangesfromlowtohigh. Bit2~0 TnRP2~TnRP0:TMnCCRP3-bitregister,comparedwiththeTMnCounterbit9~bit7 ComparatorPMatchPeriod 000:1024TMnclocks 001:128TMnclocks 010:256TMnclocks 011:384TMnclocks 100:512TMnclocks 101:640TMnclocks 110:768TMnclocks 111:896TMnclocks ThesethreebitsareusedtosetupthevalueontheinternalCCRP3-bitregister,which arethencomparedwiththeinternalcounter’shighestthreebits.Theresultofthis comparisoncanbeselectedtocleartheinternalcounteriftheTnCCLRbitissetto zero.SettingtheTnCCLRbittozeroensuresthatacomparematchwiththeCCRP valueswillresettheinternalcounter.AstheCCRPbitsareonlycomparedwiththe highestthreecounterbits,thecomparevaluesexistin128clockcyclemultiples. Clearingallthreebitstozeroisineffectallowingthecountertooverflowatits maximumvalue. TMnC1 Register (n=0) Bit 7 6 5 4 3 2 1 0 Na�e TnM1 TnM0 TnIO1 TnIO0 TnOC TnPOL TnDPX TnCCLR R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~6 TnM1~TnM0:SelectTMnOperatingMode 00:CompareMatchOutputMode 01:Undefined 10:PWMMode 11:Timer/CounterMode ThesebitssetuptherequiredoperatingmodefortheTM.Toensurereliableoperation theTMshouldbeswitchedoffbeforeanychangesaremadetotheTnM1andTnM0 bits.IntheTimer/CounterMode,theTMoutputpincontrolmustbedisabled. Bit5~4 TnIO1~TnIO0:SelectTPn_0,TPn_1outputfunction CompareMatchOutputMode 00:Nochange 01:Outputlow 10:Outputhigh 11:Toggleoutput PWMMode 00:PWMOutputinactivestate 01:PWMOutputactivestate 10:PWMoutput 11:Undefined Timer/CounterMode Unused ThesetwobitsareusedtodeterminehowtheTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheTMisrunning. IntheCompareMatchOutputMode,theTnIO1andTnIO0bitsdeterminehowthe TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA. TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth |
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