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HT45F75 Datasheet(PDF) 55 Page - Holtek Semiconductor Inc

Part # HT45F75
Description  Body Fat Scale Flash MCU
PDF  190 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F75 Datasheet(HTML) 55 Page - Holtek Semiconductor Inc

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HT45F75
Body Fat Scale Flash MCU
HT45F75
Body Fat Scale Flash MCU
Entering the SLEEP1 Mode
ThereisonlyonewayforthedevicetoentertheSLEEP1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“0”andthe
WDTorLVDon.Whenthisinstructionisexecutedundertheconditionsdescribedabove,the
followingwilloccur:
• Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”
instruction,buttheWDTorLVDwillremainwiththeclocksourcecomingfromthefSUBclock.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTclocksourceisselectedtocomefrom
thefSUBclockastheWDTisenabled.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.
Entering the IDLE0 Mode
ThereisonlyonewayforthedevicetoentertheIDLE0Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“0”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”
instruction,butthefSUBclockwillbeon.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTclocksourceisselectedtocomefrom
thefSUBclockandtheWDTisenabled.TheWDTwillstopifitsclocksourceoriginatesfromthe
systemclock.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.
Entering the IDLE1 Mode
ThereisonlyonewayforthedevicetoentertheIDLE1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“1”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThesystemclockandthefSUBclockwillbeonandtheapplicationprogramwillstopatthe“HALT”
instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTisenabledregardlessoftheWDT
clocksourcewhichoriginatesfromthefSUBclockorfromthesystemclock.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.



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