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HT45F3630 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc

Part # HT45F3630
Description  Power Tool Controller 8-Bit Flash MCU
PDF  137 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F3630 Datasheet(HTML) 39 Page - Holtek Semiconductor Inc

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HT45F3630
Power Tool Controller 8-Bit Flash MCU
HT45F3630
Power Tool Controller 8-Bit Flash MCU
SLOW Mode to NORMAL Mode Switching
InSLOWmodethesystemclockisderivedfromfSUB.Whensystemclockisswitchedbacktothe
NORMALmodefromfSUB,theCKS2~CKS0bitsshouldbesetto“000”~“110”andthenthesystem
clockwillrespectivelybeswitchedtofH~fH/64.
However,iffHisnotusedinSLOWmodeandthusswitchedoff,itwilltakesometimetore-
oscillateandstabilisewhenswitchingtotheNORMALmodefromtheSLOWMode.Thisis
monitoredusingtheHIRCFbitintheHIRCCregister.Thetimedurationrequiredforthehighspeed
systemoscillatorstabilizationisspecifiedintheA.C.characteristics.
NORMAL Mode
SLOW Mode
CKS�~CKS0 = 000~110
SLEEP Mode
FHIDEN=0� FSIDEN=0
HALT inst�u�tion is exe�uted
IDLE0 Mode
FHIDEN=0� FSIDEN=1
HALT inst�u�tion is exe�uted
IDLE1 Mode
FHIDEN=1� FSIDEN=1
HALT inst�u�tion is exe�uted
IDLE2 Mode
FHIDEN=1� FSIDEN=0
HALT inst�u�tion is exe�uted
Entering the SLEEP Mode
ThereisonlyonewayforthedevicetoentertheSLEEPModeandthatistoexecutethe“HALT”
instructionintheapplicationprogramwithboththeFHIDENandFSIDENbitinSCCregisterequal
to“0”.InthismodealltheclocksandfunctionswillbeswitchedoffexcepttheWDTfunction.
Whenthisinstructionisexecutedundertheconditionsdescribedabove,thefollowingwilloccur:
• Thesystemclockwillbestoppedandtheapplicationprogramwillstopatthe“HALT”
instruction.
• TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition.
• TheI/Oportswillmaintaintheirpresentconditions.
• Inthestatusregister,thePowerDownflagPDFwillbeset,andWDTtimeoutflagTOwillbe
cleared.
• TheWDTwillbeclearedandresumecountingiftheWDTfunctionisenabled.IftheWDT
functionisdisabled,theWDTwillbeclearedandstopped.



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