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HT45F65 Datasheet(PDF) 191 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 191 Page - Holtek Semiconductor Inc |
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191 / 231 page  Rev. 1.60 190 �ove��e� ��� �01� Rev. 1.60 191 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU UCR1 Register TheUCR1registertogetherwiththeUCR2registeraretheUARTcontrolregistersthatareused tosetthevariousoptionsfortheUARTfunctionsuchasoverallon/offcontrol,paritycontrol,data transferbitlength,etc.Furtherexplanationoneachofthebitsisgivenbelow: Bit 7 6 5 4 3 2 1 0 �a�e UARTE� B�O PRE� PRT STOPS TXBRK RX8 TX8 R/W R/W R/W R/W R/W R/W R/W R W POR 0 0 0 0 0 0 x 0 “x”:unknown Bit7 UARTEN:UARTfunctionenablecontrol 0:disableUART.TXandRXpinsareI/Oorotherpin-sharedfunctions 1:enableUART.TXandRXpinsfunctionasUARTpins TheUARTENbitistheUARTenablebit.Whenthisbitisequalto“0”,theUART willbedisabledandtheRXpinaswellastheTXpinwillbesetasI/Oorotherpin- sharedfunctions.Whenthebitisequalto“1”,theUARTwillbeenabledandtheTX andRXpinswillfunctionasdefinedbytheTXENandRXENenablecontrolbits. WhentheUARTisdisabled,itwillemptythebuffersoanycharacterremainingin thebufferwillbediscarded.Inaddition,thevalueofthebaudratecounterwillbe reset.IftheUARTisdisabled,allerrorandstatusflagswillbereset.AlsotheTXEN, RXEN,TXBRK,RXIF,OERR,FERR,PERRandNFbitswillbecleared,whilethe TIDLE,TXIFandRIDLEbitswillbeset.OthercontrolbitsinUCR1,UCR2and BRGregisterswillremainunaffected.IftheUARTisactiveandtheUARTENbitis cleared,allpendingtransmissionsandreceptionswillbeterminatedandthemodule willberesetasdefinedabove.WhentheUARTisre-enabled,itwillrestartinthe sameconfiguration. Bit6 BNO:Numberofdatatransferbitsselection 0:8-bitdatatransfer 1:9-bitdatatransfer Thisbitisusedtoselectthedatalengthformat,whichcanhaveachoiceofeither 8-bitor9-bitformat.Whenthisbitisequalto“1”,a9-bitdatalengthformatwillbe selected.Ifthebitisequalto“0”,thenan8-bitdatalengthformatwillbeselected.If 9-bitdatalengthformatisselected,thenbitsRX8andTX8willbeusedtostorethe 9thbitofthereceivedandtransmitteddatarespectively. Bit5 PREN:Parityfunctionenablecontrol 0:Parityfunctionisdisabled 1:Parityfunctionisenabled Thisbitistheparityfunctionenablebit.Whenthisbitisequalto1,theparityfunction willbeenabled.Ifthebitisequalto0,thentheparityfunctionwillbedisabled. Bit4 PRT:Paritytypeselectionbit 0:Evenparityforparitygenerator 1:Oddparityforparitygenerator Thisbitistheparitytypeselectionbit.Whenthisbitisequalto1,oddparitytypewill beselected.Ifthebitisequalto0,thenevenparitytypewillbeselected. |
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