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HT45F65 Datasheet(PDF) 185 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 185 Page - Holtek Semiconductor Inc |
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185 / 231 page  Rev. 1.60 18� �ove��e� ��� �01� Rev. 1.60 18� �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU LVD Interrupt TheLowVoltageDetectorInterruptiscontainedwithintheMulti-functionInterrupt.AnLVD InterruptrequestwilltakeplacewhentheLVDInterruptrequestflag,LVF,isset,whichoccurs whentheLowVoltageDetectorfunctiondetectsalowpowersupplyvoltage.Toallowtheprogram tobranchtoitsrespectiveinterruptvectoraddress,theglobalinterruptenablebit,EMI,LowVoltage Interruptenablebit,LVE,andassociatedMulti-functioninterruptenablebit,mustfirstbeset.When theinterruptisenabled,thestackisnotfullandalowvoltageconditionoccurs,asubroutinecallto theMulti-functionInterruptvector,willtakeplace.WhentheLowVoltageInterruptisserviced,the EMIbitwillbeautomaticallyclearedtodisableotherinterrupts,howeveronlytheMulti-function interruptrequestflagwillbealsoautomaticallycleared.AstheLVFflagwillnotbeautomatically cleared,ithastobeclearedbytheapplicationprogram. TM Interrupts TheCompactandStandardTypeTMshavetwointerruptseach,whiletheEnhancedTypeTMhas threeinterrupts.AlloftheTMinterruptsarecontainedwithintheMulti-functionInterrupts.Foreach oftheCompactandStandardTypeTMstherearetwointerruptrequestflagsTnPFandTnAFand twoenablebitsTnPEandTnAE.FortheEnhancedTypeTMtherearethreeinterruptrequestflags TnPF,TnAFandTnBFandthreeenablebitsTnPE,TnAEandTnBE.ATMinterruptrequestwill takeplacewhenanyoftheTMrequestflagsareset,asituationwhichoccurswhenaTMcomparator P,AorBmatchsituationhappens. Toallowtheprogramtobranchtoitsrespectiveinterruptvectoraddress,theglobalinterruptenable bit,EMI,respectiveTMInterruptenablebit,andrelevantMulti-functionInterruptenablebit,MFnE, mustfirstbeset.Whentheinterruptisenabled,thestackisnotfullandaTMcomparatormatch situationoccurs,asubroutinecalltotherelevantMulti-functionInterruptvectorlocations,willtake place.WhentheTMinterruptisserviced,theEMIbitwillbeautomaticallyclearedtodisableother interrupts,howeveronlytherelatedMFnFflagwillbeautomaticallycleared.AstheTMinterrupt requestflagswillnotbeautomaticallycleared,theyhavetobeclearedbytheapplicationprogram. UART Interrupt TheUARTInterruptiscontainedwithintheMulti-functionInterrupt.AUARTInterruptrequestwill takeplacewhentheUARTInterruptrequestflag,URF,isset,whichoccurswhenabyteofdatahas beenreceivedortransmittedbytheSIMinterfaceoranerrorconditionoccurs.Toallowtheprogram tobranchtoitsrespectiveinterruptvectoraddress,theglobalinterruptenablebit,EMI,andthe UARTInterruptenablebit,URE,andMuti-functioninterruptenablebits,mustfirstbeset.When theinterruptisenabled,thestackisnotfullandaUARTinterruptconditionoccurs,asubroutine calltotherespectiveMulti-functionInterruptvector,willtakeplace.WhentheUARTInterruptis serviced,theEMIbitwillbeautomaticallyclearedtodisableotherinterrupts,howeveronlythe Multi-functioninterruptrequestflagwillbealsoautomaticallycleared.AstheURFflagwillnotbe automaticallycleared,ithastobeclearedbytheapplicationprogram. |
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