HT66F4530 datasheet(193/224 Pages) HOLTEK

193 / 224 page

Rev. 1.00

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Rev. 1.00

193

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HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

EEPROM Interrupt

AnEEPROMInterruptrequestwilltakeplacewhentheEEPROMInterruptrequestflag,DEF,isset,

whichoccurswhenanEEPROMWritecycleends.Toallowtheprogramtobranchtoitsrespective

interruptvectoraddress,theglobalinterruptenablebit,EMI,andEEPROMInterruptenablebit,

DEE,mustfirstbeset.Whentheinterruptisenabled,thestackisnotfullandanEEPROMWrite

cycleends,asubroutinecalltotheEEPROMInterruptvectorwilltakeplace.WhentheEEPROM

Interruptisserviced,theEEPROMInterruptflag,DEF,willbeautomaticallycleared.TheEMIbit

willalsobeautomaticallyclearedtodisableotherinterrupts.

UART Interrupt

SeveralindividualUARTconditionscangenerateaUARTinterrupt.Whenoneoftheseconditions

occurs,aninterruptpulsewillbegeneratedtogettheattentionofthemicrocontroller.These

conditionsareatransmitterdataregisterempty,transmitteridle,receiverdataavailable,receiver

overrun,addressdetectandanRXpinwake-up.Toallowtheprogramtobranchtotherespective

interruptvectoraddresses,theglobalinterruptenablebit,EMI,andUARTinterruptenablebit,

UARTE,mustfirstbeset.Whentheinterruptisenabled,thestackisnotfullandanyofthese

conditionsarecreated,asubroutinecalltotheUARTInterruptvector,willtakeplace.Whenthe

UARTInterruptisserviced,theUARTInterruptflag,UARTF,willbeautomaticallycleared.The

EMIbitwillalsobeautomaticallyclearedtodisableotherinterrupts.However,theUSRregister

flagswillonlybeclearedwhencertainactionsaretakenbytheUART,thedetailsofwhicharegiven

intheUARTsection.

Multi-function Interrupts

WithinthesedevicesthereareuptotwoMulti-functioninterrupts.Unliketheotherindependent

interrupts,theseinterruptshavenoindependentsource,butratherareformedfromotherexisting

interruptsources,namelytheTMInterrupts.

AMulti-functioninterruptrequestwilltakeplacewhenanyoftheMulti-functioninterruptrequest

flags,MFnFareset.TheMulti-functioninterruptflagswillbesetwhenanyoftheirincluded

functionsgenerateaninterruptrequestflag.Toallowtheprogramtobranchtoitsrespectiveinterrupt

vectoraddress,whentheMulti-functioninterruptisenabledandthestackisnotfull,andeitherone

oftheinterruptscontainedwithineachofMulti-functioninterruptoccurs,asubroutinecalltooneof

theMulti-functioninterruptvectorswilltakeplace.Whentheinterruptisserviced,therelatedMulti-

FunctionrequestflagwillbeautomaticallyresetandtheEMIbitwillbeautomaticallyclearedto

disableotherinterrupts.

However,itmustbenotedthat,althoughtheMulti-functionInterruptflagswillbeautomatically

resetwhentheinterruptisserviced,therequestflagsfromtheoriginalsourceoftheMulti-function

interruptswillnotbeautomaticallyresetandmustbemanuallyresetbytheapplicationprogram.

TM Interrupts

TheStandardandPeriodicTypeTMshavetwointerrupts,onecomesfromthecomparatorAmatch

situationandtheothercomesfromthecomparatorPmatchsituation.AlloftheTMinterrupts

arecontainedwithintheMulti-functionInterrupts.ForeachoftheStandardandPeriodicType

TMstherearetwointerruptrequestflagsxTMnPFandxTMnAFandtwoenablebitsxTMnPE

andxTMnAE.ATMinterruptrequestwilltakeplacewhenanyoftheTMrequestflagsareset,a

situationwhichoccurswhenaTMcomparatorPorAmatchsituationhappens.

HT66F4530 Datasheet(PDF) 193 Page - Holtek Semiconductor Inc

HT66F4530 Datasheet(HTML) 193 Page - Holtek Semiconductor Inc

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