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HT66F4530 Datasheet(PDF) 191 Page - Holtek Semiconductor Inc |
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HT66F4530 Datasheet(HTML) 191 Page - Holtek Semiconductor Inc |
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191 / 224 page  Rev. 1.00 190 De�e��e� �1� �01� Rev. 1.00 191 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers 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.Its clocksource,fPSC,originatesfromtheinternalclocksourcefSYS,fSYS/4orfSUBandthenpasses throughadivider,thedivisionratioofwhichisselectedbyprogrammingtheappropriatebitsinthe TB0CandTB1Cregisterstoobtainlongerinterruptperiodswhosevalueranges.Theclocksource whichinturncontrolstheTimeBaseinterruptperiodisselectedusingtheCLKSEL1~CLKSEL0 bitsinthePSCRregister. M U X fSYS/4 fSYS fSUB P�es�ale� CLKSEL[1:0] fPSC fPSC/�8 ~ fPSC/�15 M U X M U X TB0[�:0] TB1[�:0] Ti�e Base 0 Inte��upt Ti�e Base 1 Inte��upt TB0ON TB1ON fPSC/�8 ~ fPSC/�15 Time Base Interrupt PSCR Register Bit 7 6 5 4 3 2 1 0 Na�e — — — — — — CLKSEL1 CLKSEL0 R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit7~2 Unimplemented,readas"0" Bit1~0 CLKSEL1~CLKSEL0:Prescalerclocksourceselection 00:fSYS 01:fSYS/4 1x:fSUB TB0C Register Bit 7 6 5 4 3 2 1 0 Na�e TB0ON — — — — TB0� TB01 TB00 R/W R/W — — — — R/W R/W R/W POR 0 — — — — 0 0 0 Bit7 TB0ON:TimeBase0Control 0:Disable 1:Enable Bit6~3 Unimplemented,readas"0" |
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