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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT69F360 датащи(PDF) 165 Page - Holtek Semiconductor Inc |
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HT69F360 датащи(HTML) 165 Page - Holtek Semiconductor Inc |
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165 / 235 page  Rev. 1.30 1�4 �ove��e� 1�� �01� Rev. 1.30 1�5 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM USR register TheUSRregisteristhestatusregisterfortheUART,whichcanbereadbytheprogramtodetermine thepresentstatusoftheUART.AllflagswithintheUSRregisterarereadonly.Furtherexplanation oneachoftheflagsisgivenbelow: Bit 7 6 5 4 3 2 1 0 �a�e PERR �F FERR OERR RIDLE RXIF TIDLE TXIF R/W R R R R R R R R POR 0 0 0 0 1 0 1 1 Bit7 PERR:Parityerrorflag 0:Noparityerrorisdetected 1:Parityerrorisdetected ThePERRflagistheparityerrorflag.Whenthisreadonlyflagis“0”,itindicatesa parityerrorhasnotbeendetected.Whentheflagis“1”,itindicatesthattheparityof thereceivedwordisincorrect.ThiserrorflagisapplicableonlyifParitymode(oddor even)isselected.Theflagcanalsobeclearedbyasoftwaresequencewhichinvolves areadtothestatusregisterUSRfollowedbyanaccesstotheRXRdataregister. Bit6 NF:Noiseflag 0:Nonoiseisdetected 1:Noiseisdetected TheNFflagisthenoiseflag.Whenthisreadonlyflagis"0",itindicatesnonoise condition.Whentheflagis"1",itindicatesthattheUARThasdetectednoiseonthe receiverinput.TheNFflagissetduringthesamecycleastheRXIFflagbutwillnot besetinthecaseofasoverrun.TheNFflagcanbeclearedbyasoftwaresequence whichwillinvolveareadtothestatusregisterUSRfollowedbyanaccesstotheRXR dataregister. Bit5 FERR:Framingerrorflag 0:Noframingerrorisdetected 1:Framingerrorisdetected TheFERRflagistheframingerrorflag.Whenthisreadonlyflagis“0”,itindicates thatthereisnoframingerror.Whentheflagis“1”,itindicatesthataframingerror hasbeendetectedforthecurrentcharacter.Theflagcanalsobeclearedbyasoftware sequencewhichwillinvolveareadtothestatusregisterUSRfollowedbyanaccessto theRXRdataregister. Bit4 OERR:Overrunerrorflag 0:Nooverrunerrorisdetected 1:Overrunerrorisdetected TheOERRflagistheoverrunerrorflagwhichindicateswhenthereceiverbufferhas overflowed.Whenthisreadonlyflagis“0”,itindicatesthatthereisnooverrunerror. Whentheflagis“1”,itindicatesthatanoverrunerroroccurswhichwillinhibitfurther transferstotheRXRreceivedataregister.Theflagisclearedbyasoftwaresequence, whichisareadtothestatusregisterUSRfollowedbyanaccesstotheRXRdata register. Bit3 RIDLE:Receiverstatus 0:Datareceptionisinprogress(databeingreceived) 1:Nodatareceptionisinprogress(receiverisidle) TheRIDLEflagisthereceiverstatusflag.Whenthisreadonlyflagis“0”,itindicates thatthereceiverisbetweentheinitialdetectionofthestartbitandthecompletionof thestopbit.Whentheflagis“1”,itindicatesthatthereceiverisidle.Betweenthe completionofthestopbitandthedetectionofthenextstartbit,theRIDLEbitis“1” indicatingthattheUARTreceiverisidleandtheRXpinstaysinlogichighcondition. |
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