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HT68F005 Datasheet(PDF) 60 Page - Holtek Semiconductor Inc |
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HT68F005 Datasheet(HTML) 60 Page - Holtek Semiconductor Inc |
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60 / 93 page  Rev. 1.00 60 ��to�e� ��� �01� Rev. 1.00 61 ��to�e� ��� �01� HT68F005/HT68F006 Enhanced I/O Flash Type MCU HT68F005/HT68F006 Enhanced I/O Flash Type MCU TMnC1 Register Bit 7 6 5 4 3 2 1 0 Name TnM1 TnM0 TnI�1 TnI�0 Tn�C TnP�L TnDPX TnCCLR R/W R/W R/W R/W R/W R/W R/W R/W R/W P�R 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 zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutput pinshouldbesetupusingtheTnOCbitintheTMnC1register.Notethattheoutput levelrequestedbytheTnIO1andTnIO0bitsmustbedifferentfromtheinitialvalue setupusingtheTnOCbitotherwisenochangewilloccurontheTMoutputpinwhen acomparematchoccurs.AftertheTMoutputpinchangesstateitcanberesettoits initiallevelbychangingtheleveloftheTnONbitfromlowtohigh. InthePWMMode,theTnIO1andTnIO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput functionismodifiedbychangingthesetwobits.Itisnecessarytoonlychangethe valuesoftheTnIO1andTnIO0bitsonlyaftertheTMnhasbeenswitchedoff. UnpredictablePWMoutputswilloccuriftheTnIO1andTnIO0bitsarechangedwhen theTMisrunning. |
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