National foreword

This British Standard is the UK implementation of ISO 11898‑2:2024. It supersedes BS ISO 11898‑2:2016, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee AUE/16, Data Communication (Road Vehicles).

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2024.

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/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO document 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) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31, Data communication.

This third edition cancels and replaces the second edition (ISO 11898‑2:2016), which has been technically revised.

The main changes are as follows:

Clause 5 is restructured, the parameters are categorized by static parameter and dynamic parameter;
Table 13 with bit rates above 1 Mbit/s and up to 2 Mbit/s is in this edition Table 15 (parameter set A). Table 14 with bit rates above 2 Mbit/s and up to 5 Mbit/s is now Table 16 (parameter set B). The parameter set C (see Table 17 and Table 18) in this edition is newly introduced;
Annex A in this edition is newly introduced; it specifies HS-PMAs with the SIC mode and the FAST mode. Annex B and Annex C in this edition are Annex A and Annex B in the previous edition. The content is unchanged.

A list of all parts in the ISO 11898 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

The ISO 11898 series provides requirement specifications for the CAN data link layer and physical layer. It is intended for chip implementers, e.g. ISO 11898‑1 for CAN protocol controllers and this document for CAN transceivers. Related conformance test plans are given in the ISO 16845 series. The CAN data link layer models the open system interconnect (OSI) data link layer; it is internally subdivided into logic link control (LLC) and medium access control (MAC). ISO 11898‑1 also specifies the CAN physical coding sublayer (PCS) by means of the attachment unit interface (AUI). Optionally, the PCS also provides the PWM encoding to be linked to a CAN SIC XL transceiver, which provides the PWM decoding.

The open system interconnect (OSI) layers above the data link layer (e.g. the network layer) are not specified in the ISO 11898 series.

Figure 1 shows the relation between the OSI layers and the CAN sublayers.

1 Scope

This document specifies physical medium attachment (PMA) sublayers for the controller area network (CAN). This includes the high-speed (HS) PMA without and with low-power mode capability, without and with selective wake-up functionality. Additionally, this document specifies PMAs supporting the signal improvement capability (SIC) mode and the FAST mode in Annex A. The physical medium dependent (PMD) sublayer is not in the scope of this document.

2 Normative references

3 Terms and definitions

4 Abbreviated terms

5 HS-PMA function

5.1 Base requirements

5.2 HS-PMA test circuit

5.3 Static parameter

5.4 Dynamic parameter

5.5 Wake-up from low-power mode

6 Conformance

Bibliography

BS ISO 11898-2:2024

Road vehicles. Controller area network (CAN) - High-speed physical medium attachment (PMA) sublayer

Current, Under Review

Published:

31 Mar 2024