0723615191 STD.ISO 10859-ENGL1997 4851903 INTERNATIONAL ISO/IEC STANDARD 10859 First edition 1997-06 Information technology 8-bit backplane interface: STEbus and mechanical core specifications for microcomputers Technologies de l'information- Interfacedefond depanier8bits-Bus STE This material is reproduced from Iso documents under International Organization for Standardization (ISO) Copyright License number IHS/IcC/1996. Not for resale. No part of these Iso documents may be reproducedinanyform,electronicretrievalsystemorotherwise,exceptas aliowed in the copyright iaw of the country of use, or with the prior written coinsent of SO (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 7341o79),IHSortheISOLicensor'smembers. ZI IEC Tso Reference number ISO/IEC 10859: 1997(E) yright International Organization for Standardization Provided by IHS under license with ISO Not for Resale STD.IS0 10859-ENGL 1997 4851903 0723616 028 INTERNATIONAL ISO/IEC STANDARD 10859 First edition 1997-06 Information technology -- 8-bit backplane interface: STEbus and mechanical core specifications for microcomputers Technologies de l'information- Interfacedefonddepanier8bits-BusSTE @ISO/IEC1997 ISO/IEC Copyright Office · Case postale 56·CH-1211 Geneve 20·Switzerland IEC Copyright Intemational Organization for Standardization Notfor Resale STD.ISO 1OB59-ENGL 1997 4851903 0723617 T64 -2 - 10859@ISO/lEC:1997 CONTENTS Page FOREWORD 3 IEEE STANDARD FOR A 8-BIT BACKPLANE INTERFACE: STEBUS INTRODUCTION 4 Clause 1 General 5 2 Functional description.. 6 3 Signal lines... 10 4 Arbitration. 16 5 Data transfer protocol 18 6 Inter-board signalling . 32 7 Electrical specifications 36 Appendices A Applicable IEC specifications . 42 B Recommended bus termination arrangement 43 MECHANICALCORESPECIFICATIONS FORMICROCOMPUTERS Page INTRODUCTION 45 Clause 1 Scope. 46 2 Object 46 3 References.. 46 4 General arrangement. 47 5 Euroboard matrix. 49 6 Euroboard sizes... 50 7 Position of plug-in unit mounted connectors (Board types and box type) 55 8 Plug-in unit description .. 58 9 Plug-in unit dimensions...... 58 10 Backplane design and mounting positions.. 59 11 Subracks.. 83 12 Environmental specifications. 66 Copyright International Organization for Standardization Not for Resale 1997 STD.IS0 1OB59-ENGL EObT 0723618 9T0 10859@ISO/IEC:1997 3- Information technology - 8-bit backplane interface: sTEbus and mechanical core specifications for microprocessors FOREWORD ISo (the International Organization for Standardization) and IEC (the International Nationat bodies that are members of IsO or IEc participate in the development of International Standards through technical committee established by the respective organization to deal with particular fields of technical activity. IsO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison withISOand IEC,alsotakepart inthework. In the field of information technology, Iso and IEc have established a joint technical committee, ISO/IEC JTC1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an international Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/lEC 10859 was prepared by joint technical committee ISO/lEC JTC1, Information technology, SC 26:Microprocessor system. This standard is a merging of IEEE Std 1000-1987 and IEEE 1101-1987. It has been submitted to the National Committees for vote under the Fast Track Procedure. The numbering of the original clauses remains unchanged. Copyright International Organization for Standardizatior 4851903 0723619837 STD.IS0 10859-ENGL 1997 4 10859@ISO/IEC:1997 INTRODUCTION TO IEEE STANDARD FOR AN 8-BIT BACKPLANE INTERFACE: STEBUS The initial concept for STEbus was to produce a European version of the STDBus using the Eurocard form factor with the DIN41612 c