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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT67F5652 데이터시트(PDF) 57 Page - Holtek Semiconductor Inc |
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HT67F5652 데이터시트(HTML) 57 Page - Holtek Semiconductor Inc |
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57 / 224 page  Rev. 1.00 5� De�e��e� 0�� �01� Rev. 1.00 5� De�e��e� 0�� �01� HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU Operating Mode Switching Thedevicecanswitchbetweenoperatingmodesdynamicallyallowingtheusertoselectthebest performance/powerratioforthepresenttaskinhand.Inthiswaymicrocontrolleroperationsthat donotrequirehighperformancecanbeexecutedusingslowerclocksthusrequiringlessoperating currentandprolongingbatterylifeinportableapplications. Insimpleterms,ModeSwitchingbetweentheNORMALModeandSLOWModeisexecuted usingtheHLCLKbitandCKS2~CKS0bitsintheSMODregisterwhileModeSwitchingfromthe NORMAL/SLOWModestotheSLEEP/IDLEModesisexecutedviatheHALTinstruction.When aHALTinstructionisexecuted,whetherthedeviceenterstheIDLEModeortheSLEEPModeis determinedbytheconditionoftheIDLENbitintheSMODregisterandFSYSONintheCTRL register. WhentheHLCLKbitswitchestoalowlevel,whichimpliesthatclocksourceisswitchedfromthe highspeedclocksource,fH,totheclocksource,fH/2~fH/64orfSUB.IftheclockisfromthefSUB,the highspeedclocksourcewillstoprunningtoconservepower.Whenthishappensitmustbenoted thatthefH/16andfH/64internalclocksourceswillalsostoprunning,whichmayaffecttheoperation ofotherinternalfunctionssuchastheTMsandtheSIM.Theaccompanyingflowchartshowswhat happenswhenthedevicemovesbetweenthevariousoperatingmodes. NORMAL fSYS=fH~fH/�4 fH on CPU �un fSYS on fSUB on IDLE1 HALT inst�u�tion exe�uted CPU stop IDLEN=1 FSYSON=1 fSYS on fSUB on IDLE0 HALT inst�u�tion exe�uted CPU stop IDLEN=1 FSYSON=0 fSYS off fSUB on SLOW fSYS=fSUB CPU �un fSYS on fSUB on fH off SLEEP1 HALT inst�u�tion exe�uted fSYS off CPU stop IDLEN=0 fSUB on WDT o� LVD on SLEEP0 HALT inst�u�tion exe�uted fSYS off CPU stop IDLEN=0 fSUB off WDT & LVD off |
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