【英文标准名称】:Informationtechnology-SmallComputerSystemInterface(SCSI)-Part115:ParallelInterface-5(SPI-5)
【原文标准名称】:信息技术.小型计算机系统接口(SCSI).第115部分:平行接口-5(SPI-5)
【标准号】:ISO/IEC14776-115-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-11
【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】:信息技术;信息交换;接口(数据处理);多触点连接器;规范(验收);信息处理;数据处理;界面;数据交换;定义;计算机;通信规程;配置;网络互连;小型计算机系统接口;电性能;数据总线;机械性能;尺寸
【英文主题词】:dataexchange;configuration;multi-contactconnectors;electricalproperties;dataprocessing;informationinterchange;databus;informationprocessing;definition;specifications;dimensions;informationtechnology;networkinterconnection;specification(approval);computers;definitions;interfaces(dataprocessing);smallcomputersysteminterface;communicationprocedures;interfaces;mechanicalproperties
【摘要】:ThispartofISO/IEC14776definesthemechanical,electrical,timing,andprotocolrequirementsoftheSCSIparallelinterfacetoallowconformingSCSIdevicestointer-operate.TheSCSIparallelinterfaceisalocalI/Obusthatmaybeoperatedoverawiderangeoftransferrates.TheobjectivesoftheSCSIparallelinterfaceare:a)Toprovidehostcomputerswithdeviceindependencewithinaclassofdevices.Thus,differentdiskdrives,tapedrives,printers,opticalmediadrives,andotherSCSIdevicesmaybeaddedtothehostcomputerswithoutrequiringmodificationstogenericsystemhardware.Provisionismadefortheadditionofspecialfeaturesandfunctionsthroughtheuseofvendor-specificoptions.Reservedareasareprovidedforfuturestandardization.b)ToprovidecompatibilitysuchthatconformingSPI-2,SPI-3devicesmayinteroperatewithSPI-5devicesgiventhatthesystemsengineeringiscorrectlydone.ConformingSPI-2,SPI-3,andSPI-5devicesshouldrespondinanacceptablemannertorejectSPI-5protocolextensions.SPI-5protocolextensionsaredesignedtobepermissiveofsuchrejectionsandthusallowSPI-2andSPI-3devicestocontinueoperationwithoutrequiringtheuseoftheextensions.TheinterfaceprotocolincludesprovisionfortheconnectionofmultipleSCSIinitiatorports(i.e.,SCSIdevicescapableofinitiatinganI/Oprocess)andmultipleSCSItargetports(i.e.,SCSIdevicescapableofrespondingtoarequesttoperformanI/Oprocess).Distributedarbitration(i.e.,bus-contentionlogic)isbuiltintothearchitectureofthisstandard.AdefaultprioritysystemawardsinterfacecontroltothehighestprioritySCSIdevicethatiscontendingforuseofthebusandanoptionalfairnessalgorithmisdefined.Thisstandarddefinesthephysicalattributesofaninput/outputbusforinterconnectingcomputersandperipheraldevices.ThesetofSCSIstandardsspecifiestheinterfaces,functions,andoperationsnecessarytoensureinteroperabilitybetweenconformingSCSIimplementations.Thisstandardisafunctionaldescription.Conformingimplementationsmayemployanydesigntechniquethatdoesnotviolateinteroperability.Thisstandardhasmadeobsoletesingle-endedandmultimodesignalingalternatives.Implementationsthatusesingle-endedormultimodesignalingalternativesshouldreferencetheSCSIParallelInterface-2standard(ISO/IEC14776-112).
【中国标准分类号】:L65
【国际标准分类号】:35_200
【页数】:326P.;A4
【正文语种】:英语