VXI总线及其接口技术

1072.2006.14(8)ComputerMeasurement&Control:2006-01-05;:2006-02-10:(1957-),,,,,(1980-),,,,,:1671-4598(2006)08-1072-03:TP274.2:BVXI张勇,毛凯,杨光,赵宇静(,100074):VXI,,,VXI,VXI,VXI,VXI,,,:VXI;;VXI-BusandInterfaceTechnologyZhangYong,MaoKai,YangGuang,ZhaoYujing(ElectromechanicalResearchInstituteofBeijing,Beijing100074,China)Abstract:VXI-Busisahottopicinthefieldoftestingandcontrolnowadays,aswellastheresearchforelandinthedesignofinstruments.ThecharacteristicsofVXI-Busareintroducedatfirst,thentheVXI-Busspecificationisexpoundedindetails,andtheinterfaceschemesofthecommondevices,whichareusedintheVXI-Bus,arepresentedatlast.Accordingtothescheme,theVXI-Businterfacehasbeensuccessfullyusedinactualautomaticmeasurementsystem.Itisindicatedthroughexperimentthatthissystemhasgoodperformanceandstability,andachievesexpectantobjective.Keywords:VXI-Bus;busnorm;businterface0VXI(VXIbus)VMEbusExtensionsforInstrumentation,VMEVXI,,IEEE488,,[1]VXI,,,:;!32,;∀,;#;∃,;%,VXI,,,VXI1VXI11VXIVXI,,VXIVXIVXI&∋,VXI,111VXIVXI1,,,VXIVXI,;;VXI:GPIBRS-232CMXIbusIEEE1394VMEbus,IEEE1394,,,,1112VXI,8,:VXI1073VXI256,,0255VXI1624321616K,64,64,64,VXI6412VXIVXIVME,,VXI8[2]:VME;!;∀;#;∃;%;(;)VXI396DINP1P2P3,P1,P2P3[3]VXIVME(1)CLK10:10MHz,0,(2)MODID:,0112MODID(3)TTL:TTLTRG0~TTLTRG7,TTL0,(4)ECL:ECLTRG0~ECLTRG5,TTL,,(5)LBUS:,(6)CLK100SYNC100:100MHz100MHz(7):VXI∗5V∗12V,∗12V()-2V,-52V(ECL)13VXIVXI2,,;,VXI;,,,,,488-VXI4882,,,213116,1616K64,64,V,:=215+214+V*64=49152+V*64A15~A0:A15A141,A1664K!64,6(A5~A0)064,64∀8A13~A634132364,107414VXI,,,A164,A24A322VXIVXI,VXI[4],21VXIVXI,,CPU,,,VXI,RAMCPUVXI5&1∋&2∋&∋FPGA,DTACK*CPU(RAM/),RAM,RAM,RAM/RAM,BUSY*,,/,DTACK*CPUIRQn*,VXIIRQn*,IACKIN*,,CPU,,VXI,[5]522VXIVXIVXI6,G*,G*:G*=A15+A14(A13++Q7)+(A12++Q6)+(A06++Q0)+LACK*+LWORD*+AM5+AM4+AM3+AM1+AM08(74LS688)DTACK*DS0*DS1*,DS0*DS1*,DTACK*,4D74LS175,16MHzSYSCLK,625ns63VXI,NI5VPP,VXI,VXI,VXI,:[1].VXI[M].:,1996.[2],.VXI[M].:,1999.[3],[R].,1997.[4],,.[M].:,1994.[5].VXI[D].,1999.