HT45FM2C datasheet(141/171 Pages) HOLTEK

141 / 171 page

Rev. 1.10

140

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Rev. 1.10

141

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HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

Preliminar�

subroutinecalltooneoftheMulti-functioninterruptvectorswilltakeplace.Whentheinterruptis

serviced,therelatedMulti-Functionrequestflag,willbeautomaticallyresetandtheEMIbitwillbe

automaticallyclearedtodisableotherinterrupts.

However,itmustbenotedthat,althoughtheMulti-functionInterruptflagswillbeautomatically

resetwhentheinterruptisserviced,therequestflagsfromtheoriginalsourceoftheMulti-function

interrupts,namelytheHallSensorinterrupts,A/Dinterrupts,PWMModuleinterrupts,CAPTM

Interrupts,TMInterrupts,RMTInterrupts,EEPROMandLVDInterruptwillnotbeautomatically

resetandmustbemanuallyresetbytheapplicationprogram.

A/D Converter Interrupt

TheA/DConverterhastwointerrupts.AllofthemarecontainedinMulti-functioninterrupt.The

oneiscontrolledbytheterminationofanA/Dconversionprocess.AnA/DConverterinterrupt

requestwilltakeplacewhentheA/DConverterInterruptrequestflag,ALIMF,isset,whichoccurs

whentheA/Dconversionprocessfinishes.TheotheriscontrolledbytheADCHVE/ADCLVEbitin

theADCR1registerandthevalueintheADLVDH/ADLVDLandADHVDH/ADHVDLboundary

controlregisters.AnA/DConverterInterruptrequestwilltakeplaceafterEOCcomparing.Toallow

theprogramtobranchtoitsrespectiveinterruptvectoraddress,theglobalinterruptenablebit,EMI,

andA/DInterruptenablebit,AEOCEorALIME,mustfirstbeset.Whentheinterruptisenabled,

thestackisnotfullandtheA/DconversionprocesshasendedorafterEOCcomparingasubroutine

calltotheA/DConverterInterruptvector,willtakeplace.Whentheinterruptisserviced,theA/D

ConverterInterruptflag,AEOCForALIMF,willbeautomaticallycleared.TheEMIbitwillalsobe

automaticallyclearedtodisableotherinterrupts.

Fault Interrupt

FaultpinisMotorControldisablepin,itsupportslowactiveleveltriggerinterrupt.Whenthis

happens,itsinterruptrequestflag,FLTFwillbeset.Toallowtheprogramtobranchtoitsinterrupt

vectoraddress,theglobalinterruptenablebit,EMIandenablebit,FLTE,mustfirstbeset.When

theinterruptisenabled,thestackisnotfullandalowactivelevelappearsonthepin,asubroutine

calltothisvectorlocationwilltakeplace.Whentheinterruptisserviced,theinterruptrequestflag,

FLTF,willbeautomaticallyresetandtheEMIbitwillbeclearedtodisableotherinterrupts.

Pause Interrupt

PausepinisMotorControlenablepin,itsupportrising/falling/bothtriggerinterrupt.Whenthis

happens,itsinterruptrequestflag,PAUFwillbeset.Toallowtheprogramtobranchtoitsinterrupt

vectoraddress,theglobalinterruptenablebit,EMIandthecorrespondingenablebit,PAUE,must

firstbeset.Whentheinterruptisenabled,thestackisnotfullandarising/falling/bothedgetrigger

appearsonthepin,asubroutinecalltothisvectorlocationwilltakeplace.Whentheinterruptis

serviced,theinterruptrequestflag,PAUF,willbeautomaticallyresetandtheEMIbitwillbecleared

todisableotherinterrupts.

PWM Module Interrupts

ThePWMModulehastwointerrups.ThetwoofthemarecontainedinMulti-functioninterrupt,

whichisknownasPWMDandPWMP.TheyaretheDutyorthePeriodmachingofthePWM

Module.AnPWMinterruptrequestwilltakeplacewhenthePWMinterruptrequestflag,PWMDF

orPWMPF,isset,whichoccurswhenthePWMDutyorPWMPeriodmatches.Whentheinterrupt

isenabled,thestackisnotfullandPWMDutyorPWMPeriodmaches,asubroutinecalltothis

vectorlocationwilltakeplace.Whentheinterruptisserviced,theEMIbitwillbeautomatically

clearedtodisableotherinterruptsandtherelatedMulti-Functionrequestflagwillbeautomatically

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