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HT45F65 Datasheet(PDF) 167 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 167 Page - Holtek Semiconductor Inc |
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167 / 231 page  Rev. 1.60 166 �ove��e� ��� �01� Rev. 1.60 167 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU SPI1 Interface SPI1 Communication TheSPI1interfaceisafullduplexsynchronousserialdatalink.Itisafourlineinterfacewithpin namesSDI1,SDO1,SCK1,SCS1B0andSCS1B1.PinsSDI1andSDO1aretheSerialDataInput andSerialDataOutputlines,SCK1istheSerialClocklineandSCS1B0andSCS1B1aretheSlave Selectline.AstheSPI1interfacepinsarepin-sharedwithnormalI/Opins,theSPI1interfacemust firstbeenabledbyselectingtheSPI1enableconfigurationoptionandsettingthecorrectbitsinthe SPI1C0andSPI1C1registers.AftertheSPI1configurationoptionhasbeenconfigureditcanalso beadditionallydisabledorenabledusingtheSPI1ENbitintheSPI1C0register.Communication betweendevicesconnectedtotheSPI1interfaceiscarriedoutinaslave/mastermodewithalldata transferinitiationsbeingimplementedbythemaster.TheMasteralsocontrolstheclocksignal. TheSCS1B0andSCS1B1pinarecontrolledbytheapplicationprogram,settheS1CSENbitto "1"toenabletheSCS1B0andSCS1B1pinfunctionandcleartheS1CSENbitto"0"toplacethe SCS1B0andSCS1B1pinintoafloatingstate. SCK1 SDO1 SDI1 SCS1B0 SCS1B1 SPI Maste� SPI Slave SPI Slave SCK SDI SDI SCS SCK SDI SDI SCS SPI1 Master/Slave Bus Connection TheSPI1functioninthisdeviceoffersthefollowingfeatures: • Fullduplexsynchronousdatatransfer • BothMasterandSlavemodes • LSBfirstorMSBfirstdatatransmissionmodes • Transmissioncompleteflag • Risingorfallingactiveclockedge • SAWCOLandS1CSENbitenabledordisableselect ThestatusoftheSPI1interfacepinsisdeterminedbyanumberoffactorssuchaswhetherthe deviceisinthemasterorslavemodeandupontheconditionofcertaincontrolbitssuchasS1CSEN andSPI1EN. |
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