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HT45F3W Datasheet(PDF) 115 Page - Holtek Semiconductor Inc |
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HT45F3W Datasheet(HTML) 115 Page - Holtek Semiconductor Inc |
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115 / 167 page  Rev. 1.50 114 De�e��e� 01� �01� Rev. 1.50 115 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU TheSPIfunctioninthisdeviceoffersthefollowingfeatures: • FullduplexsynchronousdatatransferBothMasterandSlavemodes • LSBfirstorMSBfirstdatatransmissionmodes • Transmissioncompleteflag • Risingorfallingactiveclockedge • SupportIDLEmode,theSPImodulecanoperateafterhaltinstructionisexecuted ThestatusoftheSPIinterfacepinsisdeterminedbyanumberoffactorssuchaswhetherthedevice isinthemasterorslavemodeandupontheconditionofcertaincontrolbitssuchasCSENnand SPInEN. ThereareseveralconfigurationoptionsassociatedwiththeSPIinterface.Theyareconfiguration optionsdetermineiftheCSENnandWCOLnfunctionsaretobeused. Configuration Option Function CSENn Fun�tion ena�le/disa�le WCOLn Fun�tion ena�le/disa�le SPI Interface Configuration Options SPI Control Register SPI0C0 Register Bit 7 6 5 4 3 2 1 0 Na�e SPI0� SPI01 SPI00 — — — SPI0EN — R/W R/W R/W R/W — — — R/W — POR 1 1 1 — — — 0 — Bit7~5 SPI02~SPI00:SPI0OperatingModeControl 000:SPI0mastermode;SPI0clockisfSYS/4 001:SPI0mastermode;SPI0clockisfSYS/16 010:SPI0mastermode;SPI0clockisfSYS/64 011:SPI0mastermode;SPI0clockisfSUB 100:SPI0mastermode;SPI0clockisTM0CCRPmatchfrequency/4 101:SPI0slavemode 110:Unusedmode 111:Unusedmode ThesebitssetuptheoveralloperatingmodeoftheSPI0function.Aswellasselecting iftheSPI0function,theyareusedtocontroltheSPI0Master/Slaveselectionandthe SPI0Masterclockfrequency.TheSPI0clockisafunctionofthesystemclockbutcan alsobechosentobesourcedfromtheTM0.IftheSPI0SlaveModeisselectedthen theclockwillbesuppliedbyanexternalMasterdevice. Bit4~2 Unimplemented,readas"0" Bit1 SPI0EN:SPI0Control 0:Disable 1:Enable Thebitistheoverallon/offcontrolfortheSPI0interface.WhentheSPI0ENbitis clearedtozerotodisabletheSPI0interface,theS0DI,S0DO,S0CKandS0CSlines willbeinafloatingconditionandtheSPI0operatingcurrentwillbereducedtoa minimumvalue.WhenthebitishightheSPI0interfaceisenabled. Bit0 Unimplemented,readas"0" |
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