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HT45F65 Datasheet(PDF) 190 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 190 Page - Holtek Semiconductor Inc |
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190 / 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 Bit3 RIDLE:Receiverstatus 0:datareceptionisinprogress(databeingreceived) 1:nodatareceptionisinprogress(receiverisidle) TheRIDLEflagisthereceiverstatusflag.Whenthisreadonlyflagis“0”,itindicates thatthereceiverisbetweentheinitialdetectionofthestartbitandthecompletionof thestopbit.Whentheflagis“1”,itindicatesthatthereceiverisidle.Betweenthe completionofthestopbitandthedetectionofthenextstartbit,theRIDLEbitis“1” indicatingthattheUARTreceiverisidleandtheRXpinstaysinlogichighcondition. Bit2 RXIF:ReceiveRXRdataregisterstatus 0:RXRdataregisterisempty 1:RXRdataregisterhasavailabledata TheRXIFflagisthereceivedataregisterstatusflag.Whenthisreadonlyflagis“0”, itindicatesthattheRXRreaddataregisterisempty.Whentheflagis“1”,itindicates thattheRXRreaddataregistercontainsnewdata.Whenthecontentsoftheshift registeraretransferredtotheRXRregister,aninterruptisgeneratedifRIE=1inthe UCR2register.Ifoneormoreerrorsaredetectedinthereceivedword,theappropriate receive-relatedflagsNF,FERR,and/orPERRaresetwithinthesameclockcycle.The RXIFflagisclearedwhentheUSRregisterisreadwithRXIFset,followedbyaread fromtheRXRregister,andiftheRXRregisterhasnodataavailable. Bit1 TIDLE:Transmissionstatus 0:datatransmissionisinprogress(databeingtransmitted) 1:nodatatransmissionisinprogress(transmitterisidle) TheTIDLEflagisknownasthetransmissioncompleteflag.Whenthisreadonly flagis“0”,itindicatesthatatransmissionisinprogress.Thisflagwillbesetto“1” whentheTXIFflagis“1”andwhenthereisnotransmitdataorbreakcharacterbeing transmitted.WhenTIDLEisequalto1,theTXpinbecomesidlewiththepinstate inlogichighcondition.TheTIDLEflagisclearedbyreadingtheUSRregisterwith TIDLEsetandthenwritingtotheTXRregister.Theflagisnotgeneratedwhenadata characterorabreakisqueuedandreadytobesent. Bit0 TXIF:TransmitTXRdataregisterstatus 0:characterisnottransferredtothetransmitshiftregister 1:characterhastransferredtothetransmitshiftregister(TXRdataregisterisempty) TheTXIFflagisthetransmitdataregisteremptyflag.Whenthisreadonlyflagis“0”, itindicatesthatthecharacterisnottransferredtothetransmittershiftregister.When theflagis“1”,itindicatesthatthetransmittershiftregisterhasreceivedacharacter fromtheTXRdataregister.TheTXIFflagisclearedbyreadingtheUARTstatus register(USR)withTXIFsetandthenwritingtotheTXRdataregister.Notethat whentheTXENbitisset,theTXIFflagbitwillalsobesetsincethetransmitdata registerisnotyetfull. |
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