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HT45F5R Datasheet(PDF) 113 Page - Holtek Semiconductor Inc |
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HT45F5R Datasheet(HTML) 113 Page - Holtek Semiconductor Inc |
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113 / 138 page  Rev. 1.10 11� De�e��e� 1�� �01� Rev. 1.10 11� De�e��e� 1�� �01� HT45F5R Charger ASSP Flash MCU HT45F5R Charger ASSP Flash MCU MFI2 Register Bit 7 6 5 4 3 2 1 0 Na�e — — PTM1AF PTM1PF — — PTM1AE PTM1PE R/W — — R/W R/W — — R/W R/W POR — — 0 0 — — 0 0 Bit7~6 Unimplemented,readas"0" Bit5 PTM1AF:PTM1ComparatorAmatchinterruptrequestflag 0:Norequest 1:Interruptrequest Bit4 PTM1PF:PTM1ComparatorPmatchinterruptrequestflag 0:Norequest 1:Interruptrequest Bit3~2 Unimplemented,readas"0" Bit1 PTM1AE:PTM1ComparatorAmatchinterruptcontrol 0:Disable 1:Enable Bit0 PTM1PE:PTM1ComparatorPmatchinterruptcontrol 0:Disable 1:Enable Interrupt Operation Whentheconditionsforaninterrupteventoccur,suchasaTMComparatorP,ComparatorA matchorA/Dconversioncompletionetc.,therelevantinterruptrequestflagwillbeset.Whether therequestflagactuallygeneratesaprogramjumptotherelevantinterruptvectorisdeterminedby theconditionoftheinterruptenablebit.Iftheenablebitissethighthentheprogramwilljumpto itsrelevantvector,iftheenablebitiszerothenalthoughtheinterruptrequestflagissetanactual interruptwillnotbegeneratedandtheprogramwillnotjumptotherelevantinterruptvector.The globalinterruptenablebit,ifclearedtozero,willdisableallinterrupts. Whenaninterruptisgenerated,theProgramCounter,whichstorestheaddressofthenextinstruction tobeexecuted,willbetransferredontothestack.TheProgramCounterwillthenbeloadedwitha newaddresswhichwillbethevalueofthecorrespondinginterruptvector.Themicrocontrollerwill thenfetchitsnextinstructionfromthisinterruptvector.Theinstructionatthisvectorwillusually bea"JMP"whichwilljumptoanothersectionofprogramwhichisknownastheinterruptservice routine.Hereislocatedthecodetocontroltheappropriateinterrupt.Theinterruptserviceroutine mustbeterminatedwitha"RETI",whichretrievestheoriginalProgramCounteraddressfrom thestackandallowsthemicrocontrollertocontinuewithnormalexecutionatthepointwherethe interruptoccurred. Thevariousinterruptenablebits,togetherwiththeirassociatedrequestflags,areshowninthe Accompanyingdiagramswiththeirorderofpriority.Someinterruptsourceshavetheirown individualvectorwhileotherssharethesamemulti-functioninterruptvector.Onceaninterrupt subroutineisserviced,alltheotherinterruptswillbeblocked,astheglobalinterruptenablebit, EMIbitwillbeclearedautomatically.Thiswillpreventanyfurtherinterruptnestingfromoccurring. However,ifotherinterruptrequestsoccurduringthisinterval,althoughtheinterruptwillnotbe immediatelyserviced,therequestflagwillstillberecorded. |
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