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HT66F019 Datasheet(PDF) 153 Page - Holtek Semiconductor Inc |
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HT66F019 Datasheet(HTML) 153 Page - Holtek Semiconductor Inc |
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153 / 175 page  Rev. 1.00 15� De�e��e� 01� �01� Rev. 1.00 153 De�e��e� 01� �01� HT66F019 A/D Flash MCU with EEPROM HT66F019 A/D Flash MCU with EEPROM A/D Converter Interrupt ThedevicecontainsanA/Dconverterwhichhasitsownindependentinterrupt.TheA/DConverter InterruptiscontrolledbytheterminationofanA/Dconversionprocess.AnA/DConverterInterrupt requestwilltakeplacewhentheA/DConverterInterruptrequestflag,ADF,isset,whichoccurs whentheA/Dconversionprocessfinishes.Toallowtheprogramtobranchtoitsrespectiveinterrupt vectoraddress,theglobalinterruptenablebit,EMI,andA/DconverterInterruptenablebit,ADE, mustfirstbeset.Whentheinterruptisenabled,thestackisnotfullandtheA/Dconversionprocess hasended,asubroutinecalltotheA/DConverterInterruptvector,willtakeplace.Whenthe interruptisserviced,theA/DConverterInterruptflag,ADF,willbeautomaticallycleared.TheEMI bitwillalsobeautomaticallyclearedtodisableotherinterrupts. Time Base Interrupts ThefunctionoftheTimeBaseInterruptsistoprovideregulartimesignalintheformofaninternal interrupt.Theyarecontrolledbytheoverflowsignalsfromtheirrespectivetimerfunctions.When thesehappenstheirrespectiveinterruptrequestflags,TB0ForTB1Fwillbeset.Toallowthe programtobranchtotheirrespectiveinterruptvectoraddresses,theglobalinterruptenablebit,EMI andTimeBaseenablebits,TB0EorTB1E,mustfirstbeset.Whentheinterruptisenabled,thestack isnotfullandtheTimeBaseoverflows,asubroutinecalltotheirrespectivevectorlocationswill takeplace.Whentheinterruptisserviced,therespectiveinterruptrequestflag,TB0ForTB1F,will beautomaticallyresetandtheEMIbitwillbeclearedtodisableotherinterrupts. ThepurposeoftheTimeBaseInterruptistoprovideaninterruptsignalatfixedtimeperiods.Their clocksourcesoriginatefromtheinternalclocksourcefTB.ThisfTBinputclockpassesthrougha divider,thedivisionratioofwhichisselectedbyprogrammingtheappropriatebitsintheTBC registertoobtainlongerinterruptperiodswhosevalueranges.TheclocksourcethatgeneratesfTB, whichinturncontrolstheTimeBaseinterruptperiod,canoriginatefromseveraldifferentsources, asshownintheSystemOperatingModesection. fSYS/4 M U X fTB Ti�e Base 0 Inte��upt Ti�e Base 1 Inte��upt TB0� ~ TB00 TB11 ~ TB10 ÷ �8 ~ �15 ÷ �1� ~ �15 LIRC fTBC TBCK Bit M U X LXT Configu�ation Option Time Base Interrupts • TBC Register Bit 7 6 5 4 3 2 1 0 Na�e TBON TBCK TB11 TB10 LXTLP TB0� TB01 TB00 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 1 1 0 1 1 1 Bit7 TBON:TimeBase0andTimeBase1EnableControl 0:Disable 1:Enable Bit6 TBCK:SelectfTBClock 0:fTBC 1:fSYS/4 |
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