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HT69F360 数据表(PDF) 186 Page - Holtek Semiconductor Inc |
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HT69F360 数据表(HTML) 186 Page - Holtek Semiconductor Inc |
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186 / 235 page  Rev. 1.30 1�� �ove��e� 1�� �01� Rev. 1.30 1�7 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM MFI2 Register Bit 7 6 5 4 3 2 1 0 �a�e — — DEF LVF — — DEE LVE R/W — — R/W R/W — — R/W R/W POR — — 0 0 — — 0 0 Bit7~6 Unimplemented,readas“0” Bit5 DEF:DataEEPROMinterruptrequestflag 0:Norequest 1:Interruptrequest Bit4 LVF:LVDinterruptrequestflag 0:Norequest 1:Interruptrequest Bit3~2 Unimplemented,readas“0” Bit1 DEE:DataEEPROMInterruptControl 0:Disable 1:Enable Bit0 LVE:LVDInterruptControl 0:Disable 1:Enable Interrupt Operation Whentheconditionsforaninterrupteventoccur,suchasaTMComparatorPorComparatorA match,therelevantinterruptrequestflagwillbeset.Whethertherequestflagactuallygeneratesa programjumptotherelevantinterruptvectorisdeterminedbytheconditionoftheinterruptenable bit.Iftheenablebitissethighthentheprogramwilljumptoitsrelevantvector;iftheenablebitis zerothenalthoughtheinterruptrequestflagissetanactualinterruptwillnotbegeneratedandthe programwillnotjumptotherelevantinterruptvector.Theglobalinterruptenablebit,ifclearedto zero,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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