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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT69F360 датащи(PDF) 126 Page - Holtek Semiconductor Inc |
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HT69F360 датащи(HTML) 126 Page - Holtek Semiconductor Inc |
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126 / 235 page  Rev. 1.30 1�� �ove��e� 1�� �01� Rev. 1.30 1�7 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM Timer/Counter Mode Toselectthismode,bitsSTM1andSTM0intheSTMC1registershouldbesetto11respectively. TheTimer/CounterModeoperatesinanidenticalwaytotheCompareMatchOutputMode generatingthesameinterruptflags.TheexceptionisthatintheTimer/CounterModetheTMoutput pinisnotused.ThereforetheabovedescriptionandTimingDiagramsfortheCompareMatch OutputModecanbeusedtounderstanditsfunction.AstheTMoutputpinisnotusedinthismode, thepincanbeusedasanormalI/Opinorotherpin-sharedfunction. PWM Output Mode Toselectthismode,bitsSTM1andSTM0intheSTMC1registershouldbesetto10respectively andalsotheSTIO1andSTIO0bitsshouldbesetto10respectively.ThePWMfunctionwithin theTMisusefulforapplicationswhichrequirefunctionssuchasmotorcontrol,heatingcontrol, illuminationcontroletc.Byprovidingasignaloffixedfrequencybutofvaryingdutycycleonthe TMoutputpin,asquarewaveACwaveformcanbegeneratedwithvaryingequivalentDCRMS values. AsboththeperiodanddutycycleofthePWMwaveformcanbecontrolled,thechoiceofgenerated waveformisextremelyflexible.InthePWMmode,theSTCCLRbithasnoeffectasthePWM period.BothoftheCCRAandCCRPregistersareusedtogeneratethePWMwaveform,oneregister isusedtocleartheinternalcounterandthuscontrolthePWMwaveformfrequency,whiletheother oneisusedtocontrolthedutycycle.Whichregisterisusedtocontroleitherfrequencyordutycycle isdeterminedusingtheSTDPXbitintheSTMC1register. ThePWMwaveformfrequencyanddutycyclecanthereforebecontrolledbythevaluesinthe CCRAandCCRPregisters.Aninterruptflag,oneforeachoftheCCRAandCCRP,willbe generatedwhenacomparematchoccursfromeitherComparatorAorComparatorP.TheSTOCbit IntheSTMC1registerisusedtoselecttherequiredpolarityofthePWMwaveformwhilethetwo STIO1andSTIO0bitsareusedtoenablethePWMoutputortoforcetheTMoutputpintoafixed highorlowlevel.TheSTPOLbitisusedtoreversethepolarityofthePWMoutputwaveform. • 16-bit STM, PWM Mode, Edge-aligned Mode, STDPX=0 CCRP 1~255 0 Pe�iod CCRP×�5� �553� Duty CCRA IffSYS=16MHz,TMclocksourceisfSYS/4,CCRP=2andCCRA=128, TheSTMPWMoutputfrequency=(fSYS/4)/512=fSYS/2048=7.8125kHz,duty=128/512=25%. IftheDutyvaluedefinedbytheCCRAregisterisequaltoorgreaterthanthePeriodvalue,thenthe PWMoutputdutyis100%. • 16-bit STM, PWM Mode, Edge-aligned Mode, STDPX=1 CCRP 1~255 0 Pe�iod CCRA Duty CCRP×�5� �553� ThePWMoutputperiodisdeterminedbytheCCRAregistervaluetogetherwiththeTMclock whilethePWMdutycycleisdefinedbythe(CCRP×256)exceptwhentheCCRPvalueisequalto0. |
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