HT45F4MA datasheet(44/145 Pages) HOLTEK

44 / 145 page

Rev. 1.20

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Rev. 1.20

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HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

Entering the SLEEP Mode

ThereisonlyonewayforthedevicetoentertheSLEEPModeandthatistoexecutethe“HALT”

instructionintheapplicationprogramwiththeIDLENbitinSMODregisterequalto“0”.Whenthis

instructionisexecutedundertheconditionsdescribedabove,thefollowingwilloccur:

• ThesystemclockandTimeBaseclockwillbestoppedandtheapplicationprogramwillstopat

the“HALT”instruction.

• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.

• TheWDTwillbeclearedandresumecounting.

• 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,

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.

HT45F4MA Datasheet(PDF) 44 Page - Holtek Semiconductor Inc

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