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HT66F005 Datasheet(PDF) 40 Page - Holtek Semiconductor Inc

Part # HT66F005
Description  Cost-Effective A/D Flash MCU with EEPROM
PDF  109 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F005 Datasheet(HTML) 40 Page - Holtek Semiconductor Inc

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Rev. 1.30
40
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Rev. 1.30
41
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HT66F005/HT66F006
Cost-Effective A/D Flash MCU with EEPROM
HT66F005/HT66F006
Cost-Effective A/D Flash MCU with EEPROM
Entering the SLEEP1 Mode
ThereisonlyonewayforthesedevicestoentertheSLEEP1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“0”andthe
WDTon.Whenthisinstructionisexecutedundertheconditionsdescribedabove,thefollowingwill
occur:
• ThesystemclockandTimeBaseclockwillbestoppedandtheapplicationprogramwillstopatthe
“HALT”instruction,buttheWDTwillremainwiththeclocksourcecomingfromthefLIRCclock.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTclocksourceisselectedtocomefrom
thefLIRCclockastheWDTisenabled.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.
Entering the IDLE0 Mode
ThereisonlyonewayforthesedevicestoentertheIDLE0Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“0”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”
instruction,buttheTimeBaseclockwillbeon.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTclocksourceisselectedtocomefrom
thefLIRCclockandtheWDTisenabled.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.
Entering the IDLE1 Mode
ThereisonlyonewayforthesedevicestoentertheIDLE1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“1”andthe
FSYSONbitinCTRLregisterequalto“1”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThesystemclockandTimeBaseclockandfSUBclockwillbeonandtheapplicationprogramwill
stopatthe“HALT”instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheWDTwillbeclearedandresumecountingiftheWDTisenabled.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,
willbecleared.



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