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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT69F240 데이터시트(PDF) 39 Page - Holtek Semiconductor Inc |
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HT69F240 데이터시트(HTML) 39 Page - Holtek Semiconductor Inc |
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39 / 172 page  Rev. 1.20 38 �a��� 2�� 201� Rev. 1.20 39 �a��� 2�� 201� HT69F240 I/O 8-Bit Flash MCU with LED/LCD Driver HT69F240 I/O 8-Bit Flash MCU with LED/LCD Driver Bit2 HTO:Highspeedsystemoscillatorreadyflag 0:Notready 1:Ready Thisisthehighspeedsystemoscillatorreadyflagwhichindicateswhenthehighspeed systemoscillatorisstable.Thisflagisclearedto"0"byhardwarewhenthedeviceis poweredonandthenchangestoahighlevelafterthehighspeedsystemoscillatoris stable.Thereforethisflagwillalwaysbereadas"1"bytheapplicationprogramafter devicepower-on.TheflagwillbelowwhenintheSLEEPorIDLE0Modebutafter awake-uphasoccurred,theflagwillchangetoahighlevelafter1024clockcyclesif theHXToscillatorisused. bit1 IDLEN:IDLEModecontrol 0:Disable 1:Enable ThisistheIDLEModeControlbitanddetermineswhathappenswhentheHALT instructionisexecuted.Ifthisbitishigh,whenaHALTinstructionisexecutedthe devicewillentertheIDLEMode.IntheIDLE1ModetheCPUwillstoprunning butthesystemclockwillcontinuetokeeptheperipheralfunctionsoperational,if FSYSONbitishigh.IfFSYSONbitislow,theCPUandthesystemclockwillallstop inIDLE0mode.IfthebitislowthedevicewillentertheSLEEPModewhenaHALT instructionisexecuted. bit0 HLCLK:Systemclockselection 0:fH/2~fH/64orfSUB 1:fH ThisbitisusedtoselectifthefHclockorthefH/2~fH/64orfSUBclockisusedas thesystemclock.WhenthebitishighthefHclockwillbeselectedandiflowthe fH/2~fH/64orfSUBclockwillbeselected.WhensystemclockswitchesfromthefHclock tothefSUBclockandthefHclockwillbeautomaticallyswitchedofftoconservepower. SMOD1 Register Bit 7 6 5 4 3 2 1 0 Name FSYSON — — — RSTF LVRF LRF WRF R/W R/W — — — R/W R/W R/W R/W POR 0 — — — 0 x 0 0 "x" unknown Bit7 FSYSON:fSYSControlinIDLEMode 0:Disable 1:Enable Bit6~4 Unimplemented,readas"0" Bit3 RSTF:RSTCControlregistersoftwareresetflag 0:Notoccurred 1:Occurred Thisbitissetto1iftheRSTCregistercontainsanyundefinedRSTCregistervalues. Thisineffectactslikeasoftware-resetfunction.Thisbitcanonlybeclearedto0by theapplicationprogram. Bit2 LVRF:LVRfunctionresetflag 0:Notoccurred 1:Occurred Thisbitissetto1whenaspecificLowVoltageResetsituationoccurs.Thisbitcan onlybeclearedto0bytheapplicationprogram. Bit1 LRF:LVRControlregistersoftwareresetflag 0:Notoccurred 1:Occurred Thisbitissetto1iftheLVRCregistercontainsanynondefinedLVRvoltageregister values.Thisineffectactslikeasoftware-resetfunction.Thisbitcanonlybeclearedto 0bytheapplicationprogram. |
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