HT45F56 datasheet(67/90 Pages) HOLTEK

67 / 90 page

Rev. 1.11

April 11, 2017

Rev. 1.11

April 11, 2017

HT45F56

Shock Detector Flash MCU

HT45F56

Shock Detector Flash MCU

Interrupts

Interruptsareanimportantpartofanymicrocontrollersystem.Whenanexternaleventoran

internalfunctionsuchasaTimerModuleoranA/Dconverterrequiresmicrocontrollerattention,

theircorrespondinginterruptwillenforceatemporarysuspensionofthemainprogramallowingthe

microcontrollertodirectattentiontotheirrespectiveneeds.Thesedevicescontainseveralexternal

interruptandinternalinterruptsfunctions.Theexternalinterruptsaregeneratedbytheactionof

theexternalINT0andINT1pins,whiletheinternalinterruptsaregeneratedbyvariousinternal

functionssuchastheTMs,TimeBase,EEPROM,Comparatoranddebouncecircuit.

Interrupt Registers

Overallinterruptcontrol,whichbasicallymeansthesettingofrequestflagswhencertain

microcontrollerconditionsoccurandthesettingofinterruptenablebitsbytheapplicationprogram,

iscontrolledbyaseriesofregisters,locatedintheSpecialPurposeDataMemory,asshownin

theaccompanyingtable.TheseregistersaretheINTC0~INTC2registerswhichsetuptheprimary

interrupts.

Eachregistercontainsanumberofenablebitstoenableordisableindividualinterruptsaswell

asinterruptflagstoindicatethepresenceofaninterruptrequest.Thenamingconventionofthese

followsaspecificpattern.Firstislistedanabbreviatedinterrupttype,thenthe(optional)numberof

thatinterruptfollowedbyeitheran“E”forenable/disablebitor“F”forrequestflag.

Function

Enable Bit

Request Flag

Notes

Global

EMI

—

Comparator

CPE

CPF

—

Debounce

DEBE

DEBF

—

Time Base

TBnE

TBnF

n = 0 ~ 1

EEPROM write operation

DEE

DEF

—

CTM

CTMPE

CTMPF

—

CTMAE

CTMAF

Interrupt Register Bit Naming Conventions

Name

Bit

INTC0

—

TB0F

DEBF

CPF

TB0E

DEBE

CPE

EMI

INTC1

TB1F

DEF

CTMAF

CTMPF

TB1E

DEE

CTMAE

CTMPE

Interrupt Registers List

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