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HT45F2020 датащи(PDF) 31 Page - Holtek Semiconductor Inc

номер детали HT45F2020
подробное описание детали  Sound Effect Generator Flash MCU
PDF  85 Pages
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F2020 датащи(HTML) 31 Page - Holtek Semiconductor Inc

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Rev. 1.00
30
April 11, 2017
Rev. 1.00
31
April 11, 2017
HT45F2020/HT45F2022
Sound Effect Generator Flash MCU
HT45F2020/HT45F2022
Sound Effect Generator Flash MCU
Entering the IDLE0 Mode
ThereisonlyonewayforthedevicetoentertheIDLE0Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeFHIDENbitintheSCCregisterequalto“0”andthe
FSIDENbitintheSCCregisterequalto“1”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThefHclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”instruction,but
thefSUBclockwillbeon.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflagPDFwillbeset,andWDTtimeoutflagTOwillbe
cleared.
• TheWDTwillbeclearedandresumecountingastheWDTisenabled.IftheWDTisdisabled
thenWDTwillbeclearedandstopped.
Entering the IDLE1 Mode
ThereisonlyonewayforthedevicetoentertheIDLE1Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeFHIDENbitinSCCregisterequalto“1”andthe
FSIDENbitintheSCCregisterequalto“1”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThefHandfSUBclockswillbeonbuttheapplicationprogramwillstopatthe“HALT”instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflagPDFwillbeset,andWDTtimeoutflagTOwillbe
cleared.
• TheWDTwillbeclearedandresumecountingastheWDTisenabled.IftheWDTisdisabled
thenWDTwillbeclearedandstopped.
Entering the IDLE2 Mode
ThereisonlyonewayforthedevicetoentertheIDLE2Modeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwiththeFHIDENbitintheSCCregisterequalto“1”andthe
FSIDENbitinSCCregisterequalto“0”.Whenthisinstructionisexecutedundertheconditions
describedabove,thefollowingwilloccur:
• ThefHclockwillbeonbutthefSUBclockwillbeoffandtheapplicationprogramwillstopatthe
“HALT”instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflagPDFwillbeset,andWDTtimeoutflagTOwillbe
cleared.
• TheWDTwillbeclearedandresumecountingastheWDTisenabled.IftheWDTisdisabled
thenWDTwillbeclearedandstopped.



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