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HT66F019 bảng dữ liệu(PDF) 77 Page - Holtek Semiconductor Inc |
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HT66F019 bảng dữ liệu(HTML) 77 Page - Holtek Semiconductor Inc |
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77 / 175 page  Rev. 1.00 �6 De�e��e� 01� �01� Rev. 1.00 �� De�e��e� 01� �01� HT66F019 A/D Flash MCU with EEPROM HT66F019 A/D Flash MCU with EEPROM • STMC1 Register Bit 7 6 5 4 3 2 1 0 Na�e STM1 STM0 STIO1 STIO0 STOC STPOL STDPX STCCLR 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 STM1~STM0:SelectSTMOperatingMode 00:CompareMatchOutputMode 01:CaptureInputMode 10:PWMOutputModeorSinglePulseOutputMode 11:Timer/CounterMode ThesebitssetuptherequiredoperatingmodefortheSTM.Toensurereliableoperation theSTMshouldbeswitchedoffbeforeanychangesaremadetotheSTM1andSTM0 bits.IntheTimer/CounterMode,theSTMoutputpincontrolmustbedisabled. Bit5~4 STIO1~STIO0:SelectSTPexternalpinfunction CompareMatchOutputMode 00:Nochange 01:Outputlow 10:Outputhigh 11:Toggleoutput PWMOutputMode/SinglePulseOutputMode 00:PWMoutputinactivestate 01:PWMoutputactivestate 10:PWMoutput 11:SinglePulseOutput CaptureInputMode 00:InputcaptureatrisingedgeofSTP 01:InputcaptureatfallingedgeofSTP 10:Inputcaptureatrising/fallingedgeofSTP 11:Inputcapturedisabled Timer/CounterMode Unused ThesetwobitsareusedtodeterminehowtheSTMoutputpinchangesstatewhena certainconditionisreached.Thefunctionthatthesebitsselectdependsuponinwhich modetheSTMisrunning. IntheCompareMatchOutputMode,theSTIO1andSTIO0bitsdeterminehowthe STMoutputpinchangesstatewhenacomparematchoccursfromtheComparator A.TheTMoutputpincanbesetuptoswitchhigh,switchlowortotoggleitspresent statewhenacomparematchoccursfromtheComparatorA.Whenthebitsareboth zero,thennochangewilltakeplaceontheoutput.TheinitialvalueoftheSTMoutput pinshouldbesetupusingtheSTOCbitintheSTMC1register.Notethattheoutput levelrequestedbytheSTIO1andSTIO0bitsmustbedifferentfromtheinitialvalue setupusingtheSTOCbitotherwisenochangewilloccurontheSTMoutputpinwhen acomparematchoccurs.AftertheSTMoutputpinchangesstate,itcanberesettoits initiallevelbychangingtheleveloftheSTONbitfromlowtohigh. InthePWMOutputMode,theSTIO1andSTIO0bitsdeterminehowtheSTM outputpinchangesstatewhenacertaincomparematchconditionoccurs.ThePWM outputfunctionismodifiedbychangingthesetwobits.Itisnecessarytoonlychange thevaluesoftheSTIO1andSTIO0bitsonlyaftertheSTMhasbeenswitchedoff. UnpredictablePWMoutputswilloccuriftheSTIO1andSTIO0bitsarechanged whentheSTMisrunning. |
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