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HT68F002 датащи(PDF) 39 Page - Holtek Semiconductor Inc |
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HT68F002 датащи(HTML) 39 Page - Holtek Semiconductor Inc |
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39 / 119 page ![]() Rev. 1.41 38 April 11, 2017 Rev. 1.41 39 April 11, 2017 HT68F002/HT68F0025/HT68F003 Cost-Effective Flash MCU with EEPROM HT68F002/HT68F0025/HT68F003 Cost-Effective Flash MCU with EEPROM 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. SL OW M ode SL E EP0 M ode SL E EP1 M ode ID LE 0 M ode ID LE 1 M ode NO RM AL M od e CK S2 ~ C KS0 = 00x B & HL CL K = 0 WD T is o ff ID LE N = 0 HA LT i n st ru ct io n i s ex ec ut ed WD T is o n ID LE N = 0 HA LT i n st ru ct io n i s ex ec ut ed ID LE N = 1, F SYS ON =0 HA LT i n st ru ct io n i s ex ec ut ed ID LE N = 1, F SYSO N= 1 HA LT i n st ru ct io n i s ex ec ut ed |
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