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HT46R0042 数据表(PDF) 59 Page - Holtek Semiconductor Inc

部件名 HT46R0042
功能描述  Cost-Effective A/D 8-Bit OTP MCU
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制造商  HOLTEK [Holtek Semiconductor Inc]
网页  http://www.holtek.com
标志 HOLTEK - Holtek Semiconductor Inc

HT46R0042 数据表(HTML) 59 Page - Holtek Semiconductor Inc

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Rev. 1.00
58
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Rev. 1.00
59
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HT46R0042
Cost-Effective A/D 8-Bit OTP MCU
HT46R0042
Cost-Effective A/D 8-Bit OTP MCU
External Interrupt
Foranexternalinterrupttooccur,theglobalinterruptenablebit,EMI,andexternalinterruptenable
bit,INTE,mustfirstbeset.Anactualexternalinterruptwilltakeplacewhentheexternalinterrupt
requestflag,INTFisset,asituationthatwilloccurwhenanedgetransitionappearsontheexternal
INTline.Thetypeoftransitionthatwilltriggeranexternalinterrupt,whetherhightolow,lowto
highorbothisdeterminedbytheINTES0andINTES1bits,whicharebits6and7respectivelyin
theCTRL0controlregister.Thesetwobitscanalsodisabletheexternalinterruptfunction.
INTES1
INTES0
Request Flag
0
0
Exte�nal inte��upt disa�le
0
1
Rising edge t�igge�
1
0
Falling edge t�igge�
1
1
Dual edge t�igge�
Theexternalinterruptpinispin-sharedwiththeI/OpinPA0andcanonlybeusedasanexternal
interruptpinifthecorrespondingexternalinterruptenablebitintheINTC0registerhasbeenset
andtheedgetriggertypehasbeenselectedusingtheCTRL0register.Thepinmustalsobesetas
aninputbysettingthecorrespondingPAC.0bitintheportcontrolregister.Whentheinterruptis
enabled,thestackisnotfullandatransitionappearsontheexternalinterruptpin,asubroutine
calltotheexternalinterruptvectoratlocation04H,willtakeplace.Whentheinterruptisserviced,
theexternalinterruptrequestflag,INTF,willbeautomaticallyresetandtheEMIbitwillbe
automaticallyclearedtodisableotherinterrupts.Notethatanypull-highresistorconnectionsonthis
pinwillremainvalidevenifthepinisusedasanexternalinterruptinput
Timer/Event Counter Interrupt
ForaTimer/EventCounterinterrupttooccur,theglobalinterruptenablebit,EMIandthe
correspondingtimerinterruptenablebitTEmustfirstbeset.AnactualTimer/EventCounter
interruptwilltakeplacewhentheTimer/EventCounterrequestflagTFisset,asituationthatwill
occurwhentherelevantTimer/EventCounteroverflows.Whentheinterruptisenabled,thestackis
notfullandaTimer/EventCounteroverflowoccurs,asubroutinecalltotherelevanttimerinterrupt
vector,willtakeplace.Whentheinterruptisserviced,thetimerinterruptrequestflagTFwillbe
automaticallyresetandtheEMIbitwillbeautomaticallyclearedtodisableotherinterrupts.
A/D Converter Interrupt
ThedeviceincludesA/Dinterrupt.ForanA/Dinterrupttooccur,theglobalinterruptenablebit
EMIandthecorrespondinginterruptenablebitADEmustbefirstset.AnactualA/Dinterruptwill
takeplacewhentheA/DconverterrequestflagADFisset,asituationthatwilloccurwhenanA/
Dconversionprocesshascompleted.Whentheinterruptisenabled,thestackisnotfullandanA/
Dconversionprocessfinishesexecution,asubroutinecalltotherelevantA/Dinterruptvector,will
takeplace.Whentheinterruptisserviced,theA/DinterruptrequestflagADFwillbeautomatically
resetandtheEMIbitwillbeautomaticallyclearedtodisableotherinterrupts.
Time Base Interrupt
ForatimebaseinterrupttooccurtheglobalinterruptenablebitEMIandthecorrespondinginterrupt
enablebitTBE,mustfirstbeset.AnactualTimeBaseinterruptwilltakeplacewhenthetime
baserequestflagTBFisset,asituationthatwilloccurwhentheTimeBaseoverflows.Whenthe
interruptisenabled,thestackisnotfullandatimebaseoverflowoccursasubroutinecalltotime
basevectorwilltakeplace.Whentheinterruptisserviced,thetimebaseinterruptflag.TBFwillbe
automaticallyresetandtheEMIbitwillbeautomaticallyclearedtodisableotherinterrupts.


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