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1、历年真题《微型计算机接口技术》2010.01（OvertheyearsMicrocomputerInterfaceTechnology2010.01）January2010nationalhighereducationselfstudyexaminationPrinciplesandapplicationsofMicrocomputerCourseCode:02277Asinglechoice(thetitleof20items,eachitemof1points,atotalof20points)Inthefouroptionofeachi
2、temlistedinonlyoneisinlinewiththerequirementsofthesubject,pleasefillinthecodeinquestionafterthebrackets.Thewrongchoiceornot,choosenopoints.Thewordlengthofthe1.8086microprocessoris()A.1bitB.8bitC.16bitD.32bitThestandardASCIIcodefor2.digit"3"is"0110011",anditsASCIIcodewithpar
3、itycheckis()A.00110011B.01100110C.01100111D.1011001lWhen3.BPisusedasbaseaddressregister,theimpliedsegmentregisteris()A.CSB.DSC.ESD.SSWhenthe4.8086CPUwritesontheI/Oport,thecontrolsignalM//DT/is()A.M/=L,DT/=L,B.M/=L,DT/=HC.M/=H,DT/=L,D.M/=H,DT/=H5.chip8288usedasa(8088CPU)syst
4、emA.buslatch,B.bustransceiverC.buscontroller,D.busarbiter6.whenusingrepetitivecontrolinstructions,theregisterusedasarepeatcountcounteris()A.AXB.BXC.CXD.DX7.8086ofthememoryissegmented,andthecommandtodefineaparagraphis()A.MACROandENDM,B.SEGMENT,andENDSC.PROCandENDP,D.NAME,and
5、ENDThememorycapacityofthe8.DRAMchip2164is64K*1bits,andtherefreshmethodforthe2164chipis()A.refresheseachofthe1memorycellB.eachtimeandrefreshes128storageunitsC.refresheseachofthe256memorycellD.eachtimeandrefreshes512storageunits9.thefollowingarenotpartofthebasiccomponentof825
6、9AA.priorityidentifierPRB.flagregisterFRC.8bitinterruptrequestregisterIRRD.8bitinterruptmaskregisterIMR10.thefollowingstatementabout74LS373iscorrect()A.74LS373isa3-to8addressdecoder,andB.74LS373isa8DlatchC.74LS373ismainlyusedfordatabuffering,andD.74LS373ismainlyusedforaddre
7、ssbuffering11.thefollowingarenotpartoftheDMAdatatransfermodeA.interrupttransferB.requesttransferC.singlebytetransport,D.,grouptransfer12.thefollowingstatementabout8251AisincorrectA.8251AcanbeusedforsynchronousorasynchronouscommunicationTheB.8251Aprovides4controlsignalsthata
8、reconnectedtotheMODEMC.8251Acanproduce3bitterminationbitsD.8251Ahasparity,overflow
