ISO INTERNATIONAL STANDARD 17458-2 First edition 2013-02-01 Road vehicles— FlexRay communications system Part 2: Data link layer specification Véhicules routiers-Systeme de communications FlexRay Partie 2: Spécification de la couche de liaison de données Reference number ISO 17458-2:2013(E) @ISO 2013 py IHS under lic Not for Resale ISO 17458-2:2013(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 memberbody 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 @ ISO 2013 - All rights reserved py IHS unde ermittedwithoutlicensefrom IHS Not for Resale ISO 17458-2:2013(E) Contents Page Foreword. Introduction. .vi 1 Scope. 2 Normativereferences. 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions .. 3.2 3.3 Abbreviated terms.. 4 Document overview... 10 5 Conventions 5.1 General 11 5.2 Notational conventions. 11 5.3 SDL conventions 12 5.4 Bit rates ... 5.5 Roles of a node in a FlexRay cluster.. 15 5.6 Synchronisation methods 15 5.7 Network topology considerations 5.8 Example node architecture... 24 6 Protocol operation control .. 29 6.1 Principles.... 29 6.2 6.3 The protocol operation control process........... 7 Coding and Decoding .. 7.1 Principles... 59 7.2 Description. 59 7.3 7.4 Bit strobing process... 96 7.5 Wakeup pattern decoding process.. 99 8 Frame Format... 8.1 103 8.2 FlexRay header segment (5 bytes) ... 8.3 FlexRay payload segment (0-254 bytes), 8.4 FlexRay trailer segment.. 111 8.5 CRC calculation details..... 111 9 Media Access Control. 113 9.1 Principies..... 113 9.2 Description... 123 9.3 Mediaaccesscontrolprocess 126 10 Frame and Symbol processing .... 143 10.1 143 10.2 Description... .143 10.3 149 11 Wakeup and Startup... 161 11.1 161 11.2 Cluster wakeup ... .162 11.3 Communication startup and reintegration... 167 CopyrightInterational OrganizatinforStandardizalinights reserved ili No reproduction or networking permitted without license from IHS Not for Resale ISO 17458-2:2013(E) 12 Clock synchronisation ... 12.1 Introduction ..190 12.2 Time representation 191 12.3 Synchronisation process... 12.4 Startupoftheclocksynchronisation ..200 12.5 Time measurement. ..204 12.6 Correction term calculation. .208 12.7 Clock correction.... 12.8 Sync frame configuration .. ..223 12.9 Time gateway interface .... 225 13 Controller Host Interface.. 226 13.1 Principles. 13.2 Description .227 13.3 Interfaces 228 Annex A (normative) System parameters ..268 A.1 Protocol constants ..268 A.2 Performance constants Annex B (normative) Configuration constraints B.1 General.. .271 B.2 Bit rates. 271 B.3 Parameters ..272 B.4 Calculation of configuration parameters for nodes in a TT-D cluster.... ..281 B.5 Configuration of cluster synchronisation method and node synchronisation role ..334 B.6 Calculation of configuration parameters for nodes in a TT-L cluster .... 335 B.7 Calculation of configuration parameters for nodes in a TT-E cluster... Annex C (normative) Wakeup application notes ...345 C.1 Scope... ..345 C.2 Wakeup initiation by the host... ..345 C.3 Host reactions to status flags signalled by the communication controller.. .348 c.4 Retransmission of wakeup patterns .... .349 C.5 Transition to startup.. ..349 C.6 Wakeup during operation .. .350 Bibliography.. .352 ISO2013-All rightsreserved Not for Resale ISO 17458-2:2013(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization.