ISO INTERNATIONAL STANDARD 17458-4 First edition 2013-02-01 Road vehicles— FlexRay communications system Part 4: Electrical physical layer specification Véhicules routiers -Systeme de communications FlexRay- Partie 4: Spécification de la couche d'application électrique Reference number ISO 17458-4:2013(E) @ISO 2013 py IHS under itted without license from IHS Not for Resale ISO17458-4:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @IsO2013-All rights reserved py IHS unde etworking permitted without license from IHS Not for Resale ISO 17458-4:2013(E) Contents Page Foreword. Introduction. .vi 1 Scope. 2 Normative references. 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions ... 3.2 Abbreviated terms... 10 3.3 Symbols.... 4 Document reference according to Osl model ... 5 Conventions... 5.1 General 5.2 Notational and parameter prefix conventions.. 14 5.3 15 6 Communication channel basics 16 6.1 Objective.... 16 6.2 Propagation delay .... 16 6.3 Frame TSS length change . 18 6.4 6.5 FES1 length change .. 6.6 Collisions.. 19 6.7 Stochastic jitter.. 20 6.8 Wakeup patterns.... 20 7 Principle of FlexRay networking ..... 22 7.1 Objective.... 22 7.2 Interconnection of nodes. 22 7.3 8 Network components 24 8.1 Objective. 24 8.2 Cables 24 8.3 Connectors 25 8.4 8.5 Termination concept, 27 8.6 Common mode chokes 27 8.7 Dc bus load... 27 9 Network topology 28 9.1 Objective.... 28 9.2 Point-to-point connection. 29 9.3 Passivestar. 29 9.4 9.5 Activestarnetwork 31 9.6 Cascaded active stars. 32 9.7 Hybrid topologies... 9.8 Dual channel topologies. 10 Asymmetric delay budget.... 10.1 Objective... 33 10.2 Basic topology for asymmetric delay budget. 34 10.3 Definition of Test Planes...... CpyrightInemnationalOganzaStadardizatoghtsreserved ili No reproduction or networking permit ted withoutlicensefrom IHS Not for Resale ISO 17458-4:2013(E) 10.4 Requirements to the asymmetric delay budget.... 10.5 Definition of maximum asymmetric delay portions . .36 10.6 Other networks... 43 11 Signal integrity ... .43 11.1 11.2 Mask test at TP1 / TP11 44 12 Electrical bus driver ... .49 12.1 Overview... .49 12.2 Operation modes .. .50 12.3 Operation mode transitions.... 12.4 Bus driver - communication controller interface. .53 12.5 Bus driver - bus guardian interface (optional).. 57 12.6 Bus driver -- host interface ........ 12.7 Bus driver -- power supply interface..... 12.8 Bus driver - level shift interface (optional).. 63 12.9 Bus driver - bus interface .. 63 12.10 Bus driver -- wakeup interface (optional) .... 12.11 Remote wakeup event detector (optional) .78 12.12 Bus driver behaviour under fault conditions. 80 12.13 Busdriverfunctionalclasses.. .85 12.14 Bus driver signal summary...... 13 Active Star.. 13.1 Overview.. .88 13.2 Hardware overview... .88 13.3 Signal timing ... 13.4 Activestardeviceoperationmodes .98 13.5 Autonomous power moding flag (APM flag). .100 13.6 Branch operating states..... 101 13.7 Branch transmitter and receiver circuit .... 13.8 Active star - communication controller interface (optional) ..105 13.9 Active star - bus guardian interface (optional) 115 13.10 Active star -host interface (optional)..... 115 13.11 Active star - power supply interface .... 13.12 Active star - level shift interface (optional) 118 13.13 Active star -- bus interface ..... 118 13.14 Active star - wake interface (optional).... 13.15 Activestarfunctional classes.... 119 13.16 Active star behaviour under fault conditions 120 13.17 Active star signal summary..... 122 14 Interfacedefinitions.. 123 14.1 14.2 Communication controller - bus driver interface, ..123 14.3 Host..... 126 15 General fea