GPIB USB总线控制器【外文原文】.pdf

756 GPIB Instrument Control PCMCIA-GPIB
for PCMCIA GPIB Interface
Tel: (512)794-0100•Fax: (512)683-9300•info@ National Instruments management ofPCMCIAcard andsystemresources. Card andSocket istheCardinterface. AboveSocketServices layer, Services whichprovides control andusePC Cards withoutinformationaboutthehardware to implementPCMCIAsockets,giving higher-level software theabilityto that controls sockets ards. Itmasksthedetailsofhardware used level ofsoftware, provides auniversal software interfacetothehardware are andCard SocketServices layer, TheSocketServices Services. thelowest called “hotinsertion.”ThetwolayersofPCMCIA-definedsystemsoftware, on-the-fly withoutpoweringdownorrebooting thesystem–acapability card caninsert,remove, orevenswapPC Cards Type Icard ,theType IIcard is5mmthick,andtheType III The PCCard (PCMCIA)standard includes cards PC patibility applications. Typical power consumptionisonly65mA. and portability, afeature especiallyimportantinbattery-powered mobile IEEE designedthePCMCIA-GPIBforlowpowerconsumption Talker, Listener, andController functionsandthoserequired by IEEE TNT4882C ASICmakesthePCMCIA-GPIBamaximum-performance system onstartuporwhenyouinsertthecard. TheNationalInstruments with thePlugandPlaystandard andisautomaticallyconfigured bythe Card Standard