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HT66F20 Datasheet(PDF) 127 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 127 Page - Holtek Semiconductor Inc |
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127 / 298 page  Rev. 1.90 1�6 �e���a�� 18� �01� Rev. 1.90 1�7 �e���a�� 18� �01� HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM • TM1C1 Register – 10-bit STM Bit 7 6 5 4 3 2 1 0 Name T1M1 T1M0 T1IO1 T1IO0 T1OC T1POL T1DPX T1CCLR 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 T1M1~T1M0:SelectTM1OperatingMode 00:CompareMatchOutputMode 01:CaptureInputMode 10:PWMModeorSinglePulseOutputMode 11:Timer/CounterMode ThesebitssetuptherequiredoperatingmodefortheTM.Toensurereliableoperation theTMshouldbeswitchedoffbeforeanychangesaremadetotheT1M1andT1M0 bits.IntheTimer/CounterMode,theTMoutputpincontrolmustbedisabled. Bit5~4 T1IO1~T1IO0:SelectTP1_0,TP1_1outputfunction CompareMatchOutputMode 00:Nochange 01:Outputlow 10:Outputhigh 11:Toggleoutput PWMMode/SinglePulseOutputMode 00:PWMoutputinactivestate 01:PWMoutputactivestate 10:PWMoutput 11:Singlepulseoutput CaptureInputMode 00:InputcaptureatrisingedgeofTP1_0,TP1_1 01:InputcaptureatfallingedgeofTP1_0,TP1_1 10:Inputcaptureatfalling/risingedgeofTP1_0,TP1_1 11:Inputcapturedisabled Timer/counterMode: Unused ThesetwobitsareusedtodeterminehowtheTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheTMisrunning. IntheCompareMatchOutputMode,theT1IO1andT1IO0bitsdeterminehowthe TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA. TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutput pinshouldbesetupusingtheT1OCbitintheTM1C1register.Notethattheoutput levelrequestedbytheT1IO1andT1IO0bitsmustbedifferentfromtheinitialvalue setupusingtheT1OCbitotherwisenochangewilloccurontheTMoutputpinwhen acomparematchoccurs.AftertheTMoutputpinchangesstateitcanberesettoits initiallevelbychangingtheleveloftheT1ONbitfromlowtohigh. InthePWMMode,theT1IO1andT1IO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput functionismodifiedbychangingthesetwobits.Itisnecessarytochangethevalues oftheT1IO1andT1IO0bitsonlyaftertheTMhasbeenswitchedoff.Unpredictable PWMoutputswilloccuriftheT1IO1andT1IO0bitsarechangedwhentheTMis running. |
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