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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT67F488 датащи(PDF) 116 Page - Holtek Semiconductor Inc |
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HT67F488 датащи(HTML) 116 Page - Holtek Semiconductor Inc |
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116 / 171 page  Rev. 1.60 116 �ove��e� ��� �016 HT67F488/HT67F489 TinyPowerTM A/D Flash MCU with LCD & EEPROM UCR1 Register TheUCR1registertogetherwiththeUCR2registerarethetwoUARTcontrolregistersthatareused tosetthevariousoptionsfortheUARTfunction,suchasoverallon/offcontrol,paritycontrol,data transferbitlengthetc.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.TXandRXpinsareasI/Oorotherpin-sharedfunctionalpins 1:EnableUART.TXandRXpinsfunctionasUARTpins TheUARTENbitistheUARTenablebit.IftheTXandRXpinsaresharedwiththe LCDoutputsandtheUARTinterfaceandLCDdriverarebothenabledsimultaneously, theLCDdriverwillhavetheprioritytousethecorrespondingpinsasLCDoutputs. Whenthisbitisequalto“0”,theUARTwillbedisabledandtheRXpinaswellasthe TXpinwillbeasGeneralPurposeI/Oorotherpin-sharedfunctionalpins.Whenthe bitisequalto“1”,theUARTwillbeenabledandtheTXandRXpinswillfunctionas definedbytheTXENandRXENenablecontrolbits. 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 Thisistheparityenablebit.Whenthisbitisequalto“1”,theparityfunctionwillbe enabled.Ifthebitisequalto“0”,thentheparityfunctionwillbedisabled.Replacethe mostsignificantbitpositionwithaparitybit. Bit4 PRT:Paritytypeselectionbit 0:Evenparityforparitygenerator 1:Oddparityforparitygenerator Thisbitistheparitytypeselectionbit.Whenthisbitisequalto“1”,oddparitytype willbeselected.Ifthebitisequalto“0”,thenevenparitytypewillbeselected. Bit3 STOPS:NumberofStopbitsselection 0:Onestopbitformatisused 1:Twostopbitsformatisused Thisbitdeterminesifoneortwostopbitsaretobeused.Whenthisbitisequalto“1”, twostopbitsareused.Ifthisbitisequalto“0”,thenonlyonestopbitisused. |
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