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HT45F3W Datasheet(PDF) 92 Page - Holtek Semiconductor Inc |
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HT45F3W Datasheet(HTML) 92 Page - Holtek Semiconductor Inc |
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92 / 167 page  Rev. 1.50 9� De�e��e� 01� �01� Rev. 1.50 93 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU TM2C1 Register Bit 7 6 5 4 3 2 1 0 Na�e T�M1 T�M0 T�IO1 T�IO0 T�OC T�POL T�DPX T�CCLR 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 T2M1, T2M0:SelectTM2OperatingMode 00:CompareMatchOutputMode 01:CaptureInputMode 10:PWMModeorSinglePulseOutputMode 11:Timer/CounterMode ThesebitssetuptherequiredoperatingmodefortheTM.Toensurereliableoperation theTMshouldbeswitchedoffbeforeanychangesaremadetotheT2M1andT2M0 bits.IntheTimer/CounterMode,theTMoutputpincontrolmustbedisabled. Bit5~4 T2IO1, T2IO0:SelectTP2_0,TP2_1outputfunction CompareMatchOutputMode 00:Nochange 01:Outputlow 10:Outputhigh 11:Toggleoutput PWMMode/SinglePulseOutputMode 00:PWMOutputinactivestate 01:PWMOutputactivestate 10:PWMoutput 11:Singlepulseoutput CaptureInputMode 00:InputcaptureatrisingedgeofTP2_0,TP2_1 01:InputcaptureatfallingedgeofTP2_0,TP2_1 10:Inputcaptureatfalling/risingedgeofTP2_0,TP2_1 11:Inputcapturedisabled Timer/CounterMode Unused ThesetwobitsareusedtodeterminehowtheTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheTMisrunning. IntheCompareMatchOutputMode,theT2IO1andT2IO0bitsdeterminehowthe TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA. TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutput pinshouldbesetupusingtheT2OCbitintheTM2C1register.Notethattheoutput levelrequestedbytheT2IO1andT2IO0bitsmustbedifferentfromtheinitialvalue setupusingtheT2OCbitotherwisenochangewilloccurontheTMoutputpinwhen acomparematchoccurs.AftertheTMoutputpinchangesstate,itcanberesettoits initiallevelbychangingtheleveloftheT2ONbitfromlowtohigh. InthePWMMode,theT2IO1andT2IO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput functionismodifiedbychangingthesetwobits.Itisnecessarytoonlychange thevaluesoftheT2IO1andT2IO0bitsonlyaftertheTMhasbeenswitchedoff. UnpredictablePWMoutputswilloccuriftheT2IO1andT2IO0bitsarechangedwhen theTMisrunning. |
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