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HT45F4M 데이터시트(PDF) 38 Page - Holtek Semiconductor Inc

부품명 HT45F4M
상세설명  Lithium Battery Backup Power ASSP MCU
PDF  138 Pages
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F4M 데이터시트(HTML) 38 Page - Holtek Semiconductor Inc

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HT45F4M
Lithium Battery Backup Power ASSP MCU
HT45F4M
Lithium Battery Backup Power ASSP MCU
Entering the IDLE0 Mode
ThereisonlyonewayforthedevicetoentertheIDLE0Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“0”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”instruction,
buttheTimeBaseclockfTBCandthelowfrequencyfSUBwillbeon.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecounting.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.
Entering the IDLE1 Mode
ThereisonlyonewayforthedevicetoentertheIDLE1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“1”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThesystemclocktogetherwiththeTimeBaseclockfTBCandthelowfrequencyfSUBwillbeon
andtheapplicationprogramwillstopatthe“HALT”instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecounting.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.



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