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【英文标准名称】:Informationtechnology-Smallcomputersysteminterface(SCSI)-Part112:ParallelInterface-2(SPI-2)
【原文标准名称】:信息技术.小型计算机系统接口(SCSI).第112部分:平行接口-2(SPI-2)
【标准号】:ISO/IEC14776-112-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-05
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1/SC25
【标准类型】:()
【标准水平】:()
【中文主题词】:多触点连接器;尺寸;数据总线;计算机;小型计算机系统接口;信息交换;通信规程;界面;接口(数据处理);配置;数据交换;网络互连;数据处理;信息处理;机械性能;规范(验收);定义;规范;信息技术;电性质和电现象
【英文主题词】:Communicationprocedures;Computers;Configuration;Databus;Dataexchange;Dataprocessing;Definition;Definitions;Dimensions;Electricalpropertiesandphenomena;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces;Interfaces(dataprocessing);Mechanicalproperties;Multi-contactconnectors;Networkinterconnection;SCSI;Specification(approval);Specifications
【摘要】:Thisinternationalstandarddefinesthemechanical,electrical,timing,andprotocolrequirementsoftheSCSIparallelinterfacetoallowconformingdevicestointeroperate.TheSCSIparallelinterfaceisalocalI/Obusthatmaybeoperatedoverawiderangeoftransferrates.TheobjectivesoftheSCSIparallelinterfacearea)Toprovidehostcomputerswithdeviceindependencewithinaclassofdevices.Thus,differentdiskdrives,tapedrives,printers,opticalmediadrives,andotherdevicesmaybeaddedtothehostcomputerswithoutrequiringmodificationstogenericsystemhardware.Provisionismadefortheadditionofspecialfeaturesandfunctionsthroughtheuseofvendor-specificoptions.Reservedareasareprovidedforfuturestandardization.b)ToprovidecompatibilitysuchthatproperlyconformingSCSI-2devicesmayinteroperatewithSCSI-3devicesgiventhatthesystemsengineeringiscorrectlydone.ProperlyconformingSCSI-2devicesshouldrespondinanacceptablemannertorejectSCSI-3protocolextensions.SCSI-3protocolextensionsaredesignedtobepermissiveofsuchrejectionsandthusallowtheSCSI-2devicestocontinueoperationwithoutrequiringtheuseoftheextension.Theinterfaceprotocolincludesprovisionfortheconnectionofmultipleinitiators(SCSIdevicescapableofinitiatinganI/Oprocess)andmultipletargets(SCSIdevicescapableofrespondingtoarequesttoperformanI/Oprocess).Distributedarbitration(i.e.,bus-contentionlogic)isbuiltintothearchitectureofSCSI.AdefaultprioritysystemawardsinterfacecontroltothehighestprioritySCSIdevicethatiscontendingforuseofthebusandanoptionalfairnessalgorithmisdefined.Thisstandarddefinesthephysicalattributesofaninput/outputbusforinterconnectingcomputersandperipheraldevices.Figure1isintendedtoshowthegeneralstructureofSCSIstandards.Thefigureisnotintendedtoimplyarelationshipsuchasahierarchy,protocolstack,orsystemarchitecture.ThisinternationalstandardisintendedasanalternatetotheSCSI-3ParallelInterfaceStandard.Thisinternationalstandard,inadditiontocontainingalltheinformationintheSCSI-3ParallelInterfaceStandardcontainsinformationandspecificationsforLVDandfast-40alongwithmanyotherimprovements.
【中国标准分类号】:L65
【国际标准分类号】:35_200
【页数】:203P;A4
【正文语种】:英语


【英文标准名称】:Nuclearpowerplants-Instrumentationandcontrolimportanttosafety-Generalrequirementsforsystems
【原文标准名称】:核电站中对于安全具有重要意义的仪表与控制装置的通用系统要求
【标准号】:IEC61513-2011
【标准状态】:现行
【国别】:国际
【发布日期】:2011-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC45A
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Checks;Classifying(documents);Computerizedcontrol;Controltechnology;Definitions;Electricalengineering;Instrumentation;Lifecycles;Life(durability);Nuclearpowerplants;Nuclearreactors;Nuclearsafety;Nucleartechnology;Pressurizedwaterreactors;Qualityassurance;Reactorinstrumentation;Reactorsafety;Reactorvessels;Riskanalysis;Safety;Safetyengineering;Safetyrequirements;Safetystudies
【摘要】:
【中国标准分类号】:F82
【国际标准分类号】:27_120_20
【页数】:205P;A4
【正文语种】:英语