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HT45F56 Datasheet(PDF) 34 Page - Holtek Semiconductor Inc

Part # HT45F56
Description  Shock Detector Flash MCU
PDF  90 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F56 Datasheet(HTML) 34 Page - Holtek Semiconductor Inc

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Rev. 1.11
34
April 11, 2017
Rev. 1.11
35
April 11, 2017
HT45F56
Shock Detector Flash MCU
HT45F56
Shock Detector Flash MCU
NORMAL Mode to SLOW Mode Switching
WhenrunningintheNORMALMode,whichusesthehighspeedsystemoscillator,andtherefore
consumesmorepower,thesystemclockcanswitchtorunintheSLOWModebysettingthe
HLCLKbitto“0”andsettingtheCKS2~CKS0bitsto“000”or“001”intheSMODregister.This
willthenusethelowspeedsystemoscillatorwhichwillconsumelesspower.Usersmaydecideto
dothisforcertainoperationswhichdonotrequirehighperformanceandcansubsequentlyreduce
powerconsumption.
TheSLOWModeissourcedfromtheLIRCoscillatorandthereforerequiresthisoscillatortobe
stablebeforefullmodeswitchingoccurs.ThisismonitoredusingtheLTObitintheSMODregister.
NORMAL Mode
SLOW Mode
CKS2~CKS0 = 00xB &
HLCLK = 0
SLEEP0 Mode
IDLEN=0, WDT is off,
HALT instruction is executed
IDLE0 Mode
IDLEN=1, FSYSON=0
HALT instruction is executed
IDLE1 Mode
HALT instruction is executed
IDLEN=0, WDT is on,
HALT instruction is executed
SLEEP1 Mode
IDLEN=1, FSYSON=1



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