HT66F4530 datasheet(62/224 Pages) HOLTEK

62 / 224 page

Rev. 1.00

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HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

Entering the IDLE0 Mode

ThereisonlyonewayforthesedevicestoentertheIDLE0Modeandthatistoexecutethe"HALT"

instructionintheapplicationprogramwiththeFHIDENbitintheSCCregisterequalto"0"andthe

FSIDENbitintheSCCregisterequalto"1".Whenthisinstructionisexecutedundertheconditions

describedabove,thefollowingwilloccur:

• ThefHclockwillbestoppedandtheapplicationprogramwillstopatthe"HALT"instruction,but

thefSUBclockwillbeon.

• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.

• TheI/Oportswillmaintaintheirpresentconditions.

• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,

willbecleared.

• TheWDTwillbeclearedandresumecountingiftheWDTfunctionisenabled.IftheWDT

functionisdisabled,theWDTwillbeclearedandthenstopped.

Entering the IDLE1 Mode

ThereisonlyonewayforthesedevicestoentertheIDLE1Modeandthatistoexecutethe"HALT"

instructionintheapplicationprogramwithboththeFHIDENandFSIDENbitsintheSCCregister

equalto"1".Whenthisinstructionisexecutedundertheconditionsdescribedabove,thefollowing

willoccur:

• ThefHandfSUBclockswillbeonbuttheapplicationprogramwillstopatthe"HALT"instruction.

• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.

• TheI/Oportswillmaintaintheirpresentconditions.

• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,

willbecleared.

• TheWDTwillbeclearedandresumecountingiftheWDTfunctionisenabled.IftheWDT

functionisdisabled,theWDTwillbeclearedandthenstopped.

Entering the IDLE2 Mode

ThereisonlyonewayforthesedevicestoentertheIDLE2Modeandthatistoexecutethe"HALT"

instructionintheapplicationprogramwiththeFHIDENbitintheSCCregisterequalto"1"andthe

FSIDENbitintheSCCregisterequalto"0".Whenthisinstructionisexecutedundertheconditions

describedabove,thefollowingwilloccur:

• ThefHclockwillbeonbutthefSUBclockwillbeoffandtheapplicationprogramwillstopatthe

"HALT"instruction.

• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.

• TheI/Oportswillmaintaintheirpresentconditions.

• Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO,

willbecleared.

• TheWDTwillbeclearedandresumecountingiftheWDTfunctionisenabled.IftheWDT

functionisdisabled,theWDTwillbeclearedandthenstopped.

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