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HT66F302 Datasheet(PDF) 80 Page - Holtek Semiconductor Inc |
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HT66F302 Datasheet(HTML) 80 Page - Holtek Semiconductor Inc |
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80 / 129 page  Rev. 1.11 80 April 11, 2017 Rev. 1.11 81 April 11, 2017 HT66F302/HT66F303 Cost-Effective Flash MCU with EEPROM HT66F302/HT66F303 Cost-Effective Flash MCU with EEPROM PTMC1 Register Bit 7 6 5 4 3 2 1 0 Name PTM1 PTM0 PTIO1 PTIO0 PTOC PTPOL PTCKS PTCCLR 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 PTM1~PTM0:SelectPTMOperationMode 00:CompareMatchOutputMode 01:CaptureInputMode 10:PWMModeorSinglePulseOutputMode 11:Timer/CounterMode ThesebitssetuptherequiredoperatingmodefortheTM.Toensurereliableoperation theTMshouldbeswitchedoffbeforeanychangesaremadetothePTM1andPTM0 bits.IntheTimer/CounterMode,thePTMoutputpinstateisundefined. Bit5~4 PTIO1~PTIO0:SelectPTMoutputfunction CompareMatchOutputMode 00:Nochange 01:Outputlow 10:Outputhigh 11:Toggleoutput PWMMode/SinglePulseOutputMode 00:PWMOutputinactivestate 01:PWMOutputactivestate 10:PWMoutput 11:Singlepulseoutput CaptureInputMode 00:InputcaptureatrisingedgeofPTPI 01:InputcaptureatfallingedgeofPTPI 10:Inputcaptureatfalling/risingedgeofPTPI 11:Inputcapturedisabled Timer/counterMode Unused ThesetwobitsareusedtodeterminehowtheTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheTMisrunning. IntheCompareMatchOutputMode,thePTIO1andPTIO0bitsdeterminehowthe TMoutputpinchangesstatewhenacomparematchoccursfromtheComparatorA. TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresentstate whenacomparematchoccursfromtheComparatorA.Whenthesebitsarebothzero, thennochangewilltakeplaceontheoutput.TheinitialvalueoftheTMoutputpin shouldbesetupusingthePTOCbit.NotethattheoutputlevelrequestedbythePTIO1 andPTIO0bitsmustbedifferentfromtheinitialvaluesetupusingthePTOCbit otherwisenochangewilloccurontheTMoutputpinwhenacomparematchoccurs. AftertheTMoutputpinchangesstate,itcanberesettoitsinitiallevelbychanging thelevelofthePTONbitfromlowtohigh. InthePWMMode,thePTIO1andPTIO0bitsdeterminehowtheTMoutputpin changesstatewhenacertaincomparematchconditionoccurs.ThePWMoutput functionismodifiedbychangingthesetwobits.Itisnecessarytochangethevalues ofthePTIO1andPTIO0bitsonlyaftertheTMhasbeenswitchedoff.Unpredictable PWMoutputswilloccurifthePTIO1andPTIO0bitsarechangedwhentheTMis running. |
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