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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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HT45F5N bảng dữ liệu(PDF) 52 Page - Holtek Semiconductor Inc |
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HT45F5N bảng dữ liệu(HTML) 52 Page - Holtek Semiconductor Inc |
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52 / 202 page  Rev. 1.00 5� �ove��e� 1�� �01� Rev. 1.00 53 �ove��e� 1�� �01� HT45F5N/HT45FH5N Power Bank ASSP Flash MCU HT45F5N/HT45FH5N Power Bank ASSP Flash MCU Wake-up AfterthesystementerstheSLEEPorIDLEMode,itcanbewokenupfromoneofvarioussources listedasfollows: • AnexternalfallingedgeonPortA • Asysteminterrupt • AWDToverflow Whenthedeviceexecutesthe"HALT"instruction,thePDFflagwillbesetto1.ThePDFflagwill beclearedto0ifthedeviceexperiencesasystempower-uporexecutestheclearWatchdogTimer instruction.IfthesystemiswokenupbyaWDToverflow,aWatchdogTimerresetwillbeinitiated andtheTOflagwillbesetto1.TheTOflagissetifaWDTtime-outoccursandcausesawake-up thatonlyresetstheProgramCounterandStackPointer,otherflagsremainintheiroriginalstatus. EachpinonPortAcanbesetupusingthePAWUregistertopermitanegativetransitiononthepin towake-upthesystem.WhenaPortApinwake-upoccurs,theprogramwillresumeexecutionat theinstructionfollowingthe"HALT"instruction.Ifthesystemiswokenupbyaninterrupt,then twopossiblesituationsmayoccur.Thefirstiswheretherelatedinterruptisdisabledortheinterrupt isenabledbutthestackisfull,inwhichcasetheprogramwillresumeexecutionattheinstruction followingthe"HALT"instruction.Inthissituation,theinterruptwhichwoke-upthedevicewillnot beimmediatelyserviced,butwillratherbeservicedlaterwhentherelatedinterruptisfinallyenabled orwhenastacklevelbecomesfree.Theothersituationiswheretherelatedinterruptisenabledand thestackisnotfull,inwhichcasetheregularinterruptresponsetakesplace.Ifaninterruptrequest flagissethighbeforeenteringtheSLEEPorIDLEMode,thewake-upfunctionoftherelated interruptwillbedisabled. |
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