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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F3W 데이터시트(PDF) 56 Page - Holtek Semiconductor Inc |
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HT45F3W 데이터시트(HTML) 56 Page - Holtek Semiconductor Inc |
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56 / 167 page  Rev. 1.50 5� De�e��e� 01� �01� Rev. 1.50 57 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU SL E EP0 HA LT i ns tr uc ti on i s ex ec ut ed f SYS of f CP U st op ID LE N= 0 f TB C of f f SU B of f WD T & L VD o ff NO RM AL f SYS =f H ~f H /6 4 f H o n CP U ru n f SYS o n f TB C o n f SU B o n ID LE 1 HA LT i ns tr uc ti on i s ex ec ut ed CP U st op ID LE N= 1 FS YS ON =1 f SYS o n f TB C o n f SU B on ID LE 0 HA LT i ns tr uc ti on i s ex ec ut ed CP U st op ID LE N= 1 FS YS ON =0 f SYS o ff f TB C o n f SU B o n SL OW f SYS =f L f L o n CP U ru n f SYS o n f TB C o n f SU B o n f H o ff SL E EP1 HA LT i ns tr uc ti on i s ex ec ut ed f SYS o ff CP U st op ID LE N= 0 f TB C o ff f SU B o n WD T or L VD o n Operating Mode Switching Thedevicecanswitchbetweenoperatingmodesdynamicallyallowingtheusertoselectthebest performance/powerratioforthepresenttaskinhand.Inthiswaymicrocontrolleroperationsthat donotrequirehighperformancecanbeexecutedusingslowerclocksthusrequiringlessoperating currentandprolongingbatterylifeinportableapplications. Insimpleterms,ModeSwitchingbetweentheNORMALModeandSLOWModeisexecuted usingtheHLCLKbitandCKS2~CKS0bitsintheSMOD0registerwhileModeSwitchingfromthe NORMAL/SLOWModestotheSLEEP/IDLEModesisexecutedviatheHALTinstruction.When aHALTinstructionisexecuted,whetherthedeviceenterstheIDLEModeortheSLEEPModeis determinedbytheconditionoftheIDLENbitintheSMOD0registerandFSYSONintheSMOD1 register. WhentheHLCLKbitswitchestoalowlevel,whichimpliesthatclocksourceisswitchedfromthe highspeedclocksource,fH,totheclocksource,fH/2~fH/64orfL.IftheclockisfromthefL,thehigh speedclocksourcewillstoprunningtoconservepower.Whenthishappensitmustbenotedthatthe fH/16andfH/64internalclocksourceswillalsostoprunning,whichmayaffecttheoperationofother internalfunctionssuchastheTMsandtheSPI.Theaccompanyingflowchartshowswhathappens whenthedevicemovesbetweenthevariousoperatingmodes. |
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