International ISO Standard IS017987-3 Second edition Road vehicles Local Interconnect 2025-07 Network (LIN) - Part 3: Protocol specification Véhicules routiers - Réseau Internet local (LIN) - Partie 3: Spécification du protocole Reference number ISO 17987-3:2025(en) @ ISO 2025 IS0 17987-3:2025(en) COPYRIGHT PROTECTED DOCUMENT @ IS0 2025 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or ISO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2025 - All rights reserved ii IS0 17987-3:2025(en) Contents Page Foreword. .V Introduction ..vi Scope. 1 .1 2 Normative references .1 3 Terms, definitions, symbols and abbreviated terms .1 3.1 Terms and definitions 3.2 Symbols, 3.3 Abbreviated terms ..4 Node concept. 4.1 General. ..5 4.2 Concept of operation ..6 4.2.1 Commander and responder 4.2.2 Frames. ..6 4.2.3 Data transport ..7 Protocol requirements ..7 5 5.1 Signal. .7 5.1.1 Management 5.1.2 Types. ..7 5.1.3 Consistency Packing. 5.1.4 .7 5.1.5 Reception and transmission ..8 Frame. 5.2 ..9 5.2.1 Transfer. .9 5.2.2 Structure. 5.2.3 Frame length .13 Frame types. .14 5.2.4 5.3 Schedule tables. .19 5.3.1 General ..19 5.3.2 Time definitions. ..19 5.3.3 ..19 Frame slot 5.3.4 Schedule table handling 20 5.4 Task behaviour model 20 5.4.1 20 General 5.4.2 Commander task state machine 20 5.4.3 Responder task state machine. 20 5.5 Status management .23 5.5.1 23 General 5.5.2 Concept.. 23 5.5.3 Event-triggered frames 23 5.5.4 Reporting to the cluster .23 6 Node configuration and identification .24 6.1 General .24 LIN product identification. 6.2 .24 6.2.1 Supplier ID, function ID and variant ID .24 6.2.2 Serial number. .24 25 6.2.3 Wildcards. 6.3 Responder node model 25 25 6.3.1 Memory model. 6.3.2 Responder node configuration variants 25 6.3.3 26 Initial node address 6.3.4 PDU structure. .27 6.3.5 Node configuration handling. .29 6.3.6 Node configuration services .30 @ IS0 2025 - All rights reserved iii IS0 17987-3:2025(en) .35 Annex A (normative) Definition of properties, frame identifiers and various examples .39 Annex B (informative) LIN history and version compatibility Annex C (normative) LIN auto addressing procedures. ..43 Annex D (normative) LIN AA Procedure C. .45 Annex E (normative) LIN AA Procedure D .53 Annex F (normative) LIN AA Procedure E. .59 Bibliography. ..74 @ IS0 2025 - All rights reserved iv IS0 17987-3:2025(en) 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 established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/lEC Directives, Part 1. In particular, the different approval criteria needed for the different types of IsO documents should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives). Iso draws attention to the possibility that the implementation of this document may involve the use of (a)