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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F3W 데이터시트(PDF) 74 Page - Holtek Semiconductor Inc |
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HT45F3W 데이터시트(HTML) 74 Page - Holtek Semiconductor Inc |
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74 / 167 page  Rev. 1.50 74 De�e��e� 01� �01� Rev. 1.50 75 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU SCKO Function TheSCKOOutputallowsthedevicetosupplyexternalhardwarewithaclocksignalsynchronised tothemicrocontrollerclock. SCKO Operation TheSCKOfunctioniscontrolledusingtheSCKOCregister.Asthepin,SCKO,issharedwithPC1, therequiredpinfunctionischosenviatheSCKCbitintheSCKOCregister.Theclocksourcefor theSCKOOutputissourcedfromadividedratiooftheinternalfSYSclock.TheSCKCbitinisthe overallon/offcontrol,settingSCKCbitto“1”enablestheSCKO,settingSCKCbitto“0”disables it.TherequireddivisionratioofthesystemclockisselectedusingtheSCKS1andSCKS0bitsin thesameregister.IftheSCKOisenabled,theoutputsignalintheoutputmodeofPC1willbethe SCKOsignalgeneratedbythesystemclock.Theinputmodealwaysremainsitsoriginalfunctions. OncetheSCKOisselected,theSCKOoutputsignaliscontrolledbyPC1dataregisteronly. SCKOC Register Bit 7 6 5 4 3 2 1 0 Na�e — — — SCKC SCKS1 SCKS0 — SCKOS R/W — — — R/W R/W R/W — R/W POR — — — 0 0 0 — 0 Bit7~5 Unimplemented,readas“0” Bit4 SCKC:SelectI/OorSCKoutputfunction 0:I/O 1:SCKoutput Bit3~2 SCKS1, SCKS0:SCKoutputfrequencyselection(SCKOpin) 00:fSYS/1 01:fSYS/2 10:fSYS/4 11:fSYS/8 Bit1 Unimplemented,readas“0” Bit0 SCKOS:PC1/SCKOoutputsink/sourcecurrentoption 0:normalI/Ocurrent 1:normalI/Ocurrent/2 I/O Pin Structures TheaccompanyingdiagramsillustratetheinternalstructuresofsomegenericI/Opintypes.As theexactlogicalconstructionoftheI/Opinwilldifferfromthesedrawings,theyaresuppliedasa guideonlytoassistwiththefunctionalunderstandingoftheI/Opins.Thewiderangeofpin-shared structuresdoesnotpermitalltypestobeshown. |
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