HT45F56 datasheet(70/90 Pages) HOLTEK

70 / 90 page

Rev. 1.11

April 11, 2017

Rev. 1.11

April 11, 2017

HT45F56

Shock Detector Flash MCU

HT45F56

Shock Detector Flash MCU

Thevariousinterruptenablebits,togetherwiththeirassociatedrequestflags,areshowninthe

accompanyingdiagramswiththeirorderofpriority.Someinterruptsourceshavetheirown

individualvectorwhileotherssharethesamemulti-functioninterruptvector.Onceaninterrupt

subroutineisserviced,allotherinterruptswillbeblocked,astheglobalinterruptenablebit,EMI

bitwillbeclearedautomatically.Thiswillpreventanyfurtherinterruptnestingfromoccurring.

However,ifotherinterruptrequestsoccurduringthisinterval,althoughtheinterruptwillnotbe

immediatelyserviced,therequestflagwillstillberecorded.

Ifaninterruptrequiresimmediateservicingwhiletheprogramisalreadyinanotherinterruptservice

routine,theEMIbitshouldbesetafterenteringtheroutinetoallowinterruptnesting.Ifthestack

isfull,theinterruptrequestwillnotbeacknowledged,eveniftherelatedinterruptisenabled,until

theStackPointerisdecremented.Ifimmediateserviceisdesired,thestackmustbepreventedfrom

becomingfull.Incaseofsimultaneousrequests,theaccompanyingdiagramshowstheprioritythat

isapplied.AlloftheinterruptrequestflagswhensetwillwakeupthedeviceifitisinSLEEPor

IDLEMode,howevertopreventawake-upfromoccurringthecorrespondingflagshouldbeset

beforethedeviceisinSLEEPorIDLEMode.

Comparator

CPF

CPE

EMI

04H

EMI

08H

Debounce

DEBF

DEBE

EMI

0CH

EMI

10H

Time Base 0

TB0F

TB0E

EMI

14H

EMI

18H

Interrupt Name

Request

Flags

Enable Bits

Master

Enable

Vector

EMI auto disabled in ISR

Priority

High

Low

EMI

1CH

Time Base 1

TB1F

TB1E

CTM P

CTMPF

CTMPE

CTM A

CTMAF

CTMAE

EEPROM

DEF

DEE

xxE

Enable Bits

xxF

Request Flag, auto reset in ISR

Legend

Interrupt Structure

Comparator Interrupt

TheComparatorInterruptiscontrolledbytheComparatoroutputtransition.AComparatorInterrupt

requestwilltakeplacewhentheComparatorInterruptrequestflag,CPF,isset,whichoccurswhen

theComparatoroutputchangesstate.Toallowtheprogramtobranchtoitsrespectiveinterrupt

vectoraddress,theglobalinterruptenablebit,EMI,andComparatorInterruptenablebit,CPE,must

firstbeset.Whentheinterruptisenabled,thestackisnotfullandtheComparatoroutputtransition

occurs,asubroutinecalltotheComparatorInterruptvectorwilltakeplace.Whentheinterruptis

serviced,theComparatorInterruptflag,CPF,willbeautomaticallycleared.TheEMIbitwillalsobe

automaticallyclearedtodisableotherinterrupts.

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