【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】:FixedRadioSystems-Point-to-multipointequipment;Point-to-multipointdigitalradiosystemsinfrequencybandsintherange24,25GHzto29,5GHzusingdifferentaccessmethods-Part3:TimeDivisionMultipleAccess(TDMA)methods(Endorsementofthe
【原文标准名称】:固定无线电系统.点对多点设备.使用不同存取方法的在24.25～29.5GHz频率范围内工作的点对多点数字无线电系统.第3部分:时间分隔多路存取法
【标准号】:DINEN301213-3-2002
【标准状态】:作废
【国别】:德国
【发布日期】:2002-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:用户系统;接口(数据处理);电信传输法;信息处理;存取;频率;数字工程;电路网络;传输技术;频带;复接;无线电工程;时间;通信技术;数字无线电技术;多路连接;时间间隔多路存取;无线系统;无线中继迟系统;继电式无线电;传输法
【英文主题词】:
【摘要】:
【中国标准分类号】:M36
【国际标准分类号】:33_060_30
【页数】:1P;A4
【正文语种】:德语