ISO 11898-2:2016

Road vehicles — Controller area network (CAN) — Part 2: High-speed medium access unit

ISO 11898-2:2016 specifies the high-speed physical media attachment (HS-PMA) of the controller area network (CAN), a serial communication protocol that supports distributed real-time control and multiplexing for use within road vehicles. This includes HS-PMAs without and with low-power mode capability as well as with selective wake-up functionality. The physical media dependant sublayer is not in the scope of this document.

Véhicules routiers — Gestionnaire de réseau de communication (CAN) — Partie 2: Unité d'accès au support à haute vitesse

General Information

• Status: Withdrawn
• Publication Date: 13-Dec-2016
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ISO/TC 22/SC 31 - Data communication
• Drafting Committee: ISO/TC 22/SC 31/WG 3 - In-vehicle networks
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 22-Mar-2024
• Completion Date: 19-Apr-2025

Relations

• Consolidated By: ISO 21187:2021 - Milk — Quantitative determination of microbiological quality — Guidance for establishing and verifying a conversion relationship between results of an alternative method and anchor method results
• Effective Date: 06-Jun-2022
• Revised: ISO 11898-2:2024 - Road vehicles — Controller area network (CAN) — Part 2: High-speed physical medium attachment (PMA) sublayer
• Effective Date: 06-Jun-2022
• Revises: ISO 11898-2:2003 - Road vehicles — Controller area network (CAN) — Part 2: High-speed medium access unit
• Effective Date: 16-Aug-2014

Standards Content (Sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 11898-2
ISO/TC 22/SC 31 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-12-17 2016-03-16
Road vehicles — Controller area network (CAN) —
Part 2:
High-speed medium access unit
Véhicules routiers — Gestionnaire de réseau de communication (CAN) —
Partie 2: Unité d’accès au support à haute vitesse
ICS: 43.040.15
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11898-2:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 11898-2:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

ISO/DIS 11898-2:2015(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
5 Functional description of the HS-PMA . 2
5.1 General . 2
5.2 HS-PMA test circuit . 3
5.3 Transmitter characteristics . 3
5.4 Receiver characteristics . 6
5.5 Receiver input resistance . 7
5.6 Transmitter and receiver timing behaviour . 8
5.7 Maximum ratings of V , V and V .
CAN_H CAN_L Diff 10
5.8 Maximum leakage currents of CAN_H and CAN_L .11
5.9 Wake-up from low-power mode .11
5.9.1 Overview .11
5.9.2 Basic wake-up.11
5.9.3 Wake-up pattern wake-up .12
5.9.4 Selective wake-up . .12
5.10 Bus biasing .17
5.10.1 Overview .17
5.10.2 Normal biasing .17
5.10.3 Automatic voltage biasing .17
6 Conformance .20
Annex A (informative) ECU and network design .21
ISO/DIS 11898-2:2015(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 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11898-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31, Data
communication.
ISO 11898 consists of the following parts, under the general title Road vehicles — Controller area
network (CAN):
— Part 1: Data link layer and physical signalling
— Part 2: High-speed medium access unit
— Part 3: Low-speed fault tolerant physical medium attachment
— Part 4: Time-triggered communication
iv © ISO 2015 – All rights reserved

ISO/DIS 11898-2:2015(E)
Introduction
ISO 11898 was first published as one document in 1993. It covered the CAN data link layer as well as
the high-speed physical layer. In the reviewed and restructured ISO 11898- series parts 1 and 4 defined
the CAN protocol and time-triggered CAN (TTCAN) while the parts 2, 5 and 6 defined the high-speed
physical layer, and part 3 defined the low-speed fault tolerant physical layer.
ISO 11898-2:2003, ISO 11898-5:2007 and ISO 11898-6:2013 have been withdrawn and replaced by this
version of ISO 11898-2.
Figure 1 shows the relation of the OSI (Open System Interconnection) layers and its sub-layers to the
ISO 11898 part 1 and part 2 as well as part 3.
Key
AUI attachment unit interface
MDI media dependant interface
OSI open system interconnection
Figure 1 — Overview of ISO 11898 specification series
The International Organization for Standardization (ISO) [and/or] International Electro-technical
Commission (IEC) draws attention to the fact that it is claimed that compliance with this document may
involve the use of a patent concerning the selective wake-up function given in 5.9.4.
ISO [and/or] IEC take[s] no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the ISO [and/or] IEC that he/she is willing to negotiate
licenses under reasonable and non-discriminatory terms and conditions with applicants throughout
ISO/DIS 11898-2:2015(E)
the world. In this respect, the statement of the holder of this patent right is registered with ISO [and/or]
IEC. Information may be obtained from:
Audi AG Elmos Semiconductor AG Renesas Electronics Europe GmbH
August-Horch-Str. Heinrich-Hertz-Str. 1 Arcadiastr. 10
85045 Ingolstadt 44227 Dortmund 40472 Düsseldorf
Germany Germany Germany
BMW Group Freescale Semiconductor Inc. Robert Bosch GmbH
Knorrstr. 147 Schatzbogen 7 PO Box 30 02 20
80788 München 81829 München 70442 Stuttgart
Germany Germany Germany
Continental Teves AG & Co. oHG General Motors Corp. STMicroelectronics Application
Guerickestr. 7 30001 VanDyke, Bldg 2-10 GmbH
60488 Frankfurt am Main Warren, MI 48090-9020 Bahnhofstrasse 18
Germany United States of America 85609 Aschheim Dornach
Germany
Denso Japan Corp. NXP BV Volkswagen AG
1-1, Showa-cho, Kariya-shi High Tech Campus 60 PO Box 011/1770
Aichi-ken 448-8661 5656 AG Eindhoven 38436 Wolfsburg
Japan The Netherlands Germany
Attention is drawn to the possibility that some of the elements of this document may be the subject
of patent rights other than those identified above. ISO [and/or] IEC shall not be held responsible for
identifying any or all such patent rights. ISO (www.iso.org/patents) and IEC (http://patents.iec.ch)
maintain on-line databases of patents relevant to their standards. Users are encouraged to consult the
databases for the most up to date information concerning patents.
vi © ISO 2015 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 11898-2:2015(E)
Road vehicles — Controller area network (CAN) —
Part 2:
High-speed medium access unit
1 Scope
This part of ISO 11898 specifies the high-speed physical media attachment (HS-PMA) of the controller
area network (CAN) a serial communication protocol that supports distributed real-time control
and multiplexing for use within road vehicles. This includes HS-PMAs without and with low-power
capability as well as with selective wake-up functionality. The physical media dependant sub-layer is
not in the scope of this part.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this part and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC 7498-1:1994, Information technology — Open Systems Interconnection — Basic Reference Model:
The Basic Model — Part 1
ISO 11898-1:2015, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and
physical signalling
ISO 16845-2:2014, Road vehicles — Controller area network (CAN) conformance test plan — Part 2: High-
speed medium access unit with selective wake-up functionality
3 Terms and definitions
For the purpose of this document, the terms and definitions given in ISO 11898-1 and the following
apply. See figure A.1 in Annex A for a visualization of the definitions.
3.1
attachment unit interface (AUI)
The attachment unit interface is the interface between the PCS that is specified in part 1 of ISO 11898
and the PMA that is specified in this of ISO 11898.
3.2
ground (GND)
electrical signal ground
3.3
medium attachment unit (MAU)
unit that comprises the physical media attachment and the media dependent interface
3.4
media dependent interface (MDI)
interface that ensures proper signal transfer between the media and the physical media attachment
3.5
physical coding sublayer (PCS)
sub-layer that performing bit encoding/decoding and synchronization
ISO/DIS 11898-2:2015(E)
3.6
physical media attachment (PMA)
sub-layer that converts physical signals into logical signals and vice versa
3.7
transceiver
implementation that comprises one or more physical media attachments
4 Symbols and abbreviated terms
For the purpose of this part, the symbols and abbreviated terms given in ISO 11898-1 and the following
apply. Some of these abbreviations are also defined in ISO 11898-1. If the definition of the term here is
different from the definition in ISO 11898-1, this definition applies.
AUI attachment unit interface
EMC electro-magnetic compatibility
ESD electro static discharge
GND ground
HS-PMA high-speed PMA
MAU medium attachment unit
MDI media dependent interface
PCS Physical coding sub-layer
PMA physical media attachment
PMD physical media dependent
WUF wake-up frame
WUP wake-up pattern
5 Functional description of the HS-PMA
5.
...

INTERNATIONAL ISO
STANDARD 11898-2
Second edition
2016-12-15
Road vehicles — Controller area
network (CAN) —
Part 2:
High-speed medium access unit
Véhicules routiers — Gestionnaire de réseau de communication
(CAN) —
Partie 2: Unité d’accès au support à haute vitesse
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
5 Functional description of the HS-PMA . 3
5.1 General . 3
5.2 HS-PMA test circuit . 3
5.3 Transmitter characteristics . 4
5.4 Receiver characteristics . 8
5.5 Receiver input resistance . 9
5.6 Transmitter and receiver timing behaviour . 9
5.7 Maximum ratings of V , V and V .
CAN_H CAN_L Diff 11
5.8 Maximum leakage currents of CAN_H and CAN_L .12
5.9 Wake-up from low-power mode .12
5.9.1 Overview .12
5.9.2 Basic wake-up.13
5.9.3 Wake-up pattern wake-up .13
5.9.4 Selective wake-up . .13
5.10 Bus biasing .18
5.10.1 Overview .18
5.10.2 Normal biasing .18
5.10.3 Automatic voltage biasing .18
6 Conformance .20
Annex A (informative) ECU and network design .21
Annex B (informative) PN physical layer modes .29
Bibliography .30
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 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 31, Data
communication.
This second edition cancels and replaces the first edition (ISO 11898-2:2003), which has been
technically revised, with the following changes:
— max output current on CANH/CANL has been defined (Table 4);
— optional TXD timeout has been defined (Table 7);
— receiver input resistance range has been changed (Table 10);
— Bit timing parameters for CAN FD for up to 2 Mbps have been defined (Table 13);
— Bit timing parameters for CAN FD for up to 5 Mbps have been defined (Table 14);
— content of ISO 11898-5 and ISO 11898-6 has been integrated to ensure there is one single ISO
Standard for all HS-PMA implementations;
— selective wake-up (formerly ISO 11898-6) CAN FD tolerance has been defined;
— wake-filter timings (formerly in ISO 11898-5) have been changed (Table 20)
— requirements and assumptions about the PMD sublayer have been shifted to Annex A, to clearly
focus on the HS-PMA implementation.
A list of all parts in the ISO 11898 series can be found on the ISO website.
iv © ISO 2016 – All rights reserved

Introduction
ISO 11898 was first published as one document in 1993. It covered the CAN data link layer as well as
the high-speed physical layer. In the reviewed and restructured ISO 11898 series, ISO 11898-1 and
ISO 11898-4 defined the CAN protocol and time-triggered CAN (TTCAN) while ISO 11898-2 defines the
high-speed physical layer, and ISO 11898-3 defined the low-speed fault tolerant physical layer.
Figure 1 shows the relation of the Open System Interconnection (OSI) layers and its sublayers to
ISO 11898-1, this document as well as ISO 11898-3.
Key
AUI attachment unit interface
MDI media dependant interface
OSI open system interconnection
Figure 1 — Overview of ISO 11898 specification series
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this document may involve the use of a patent concerning the selective wake-up
function given in 5.9.4.
ISO takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured ISO that he/she is willing to negotiate licenses under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In
this respect, the statement of the holder of this patent right is registered with ISO. Information may be
obtained from the following:
Audi AG Elmos Semiconductor AG Renesas Electronics Europe GmbH
August-Horch-Str. Heinrich-Hertz-Str. 1 Arcadiastr. 10
85045 Ingolstadt 44227 Dortmund 40472 Düsseldorf
Germany Germany Germany
BMW Group Freescale Semiconductor Inc. Robert Bosch GmbH
Knorrstr. 147 6501 W. William Canon Drive PO Box 30 02 20
80788 München Austin, Texas 70442 Stuttgart
Germany United States Germany
Continental Teves AG & Co. oHG General Motors Corp. STMicroelectronics Application
Guerickestr. 7 30001 VanDyke, Bldg 2-10 GmbH
60488 Frankfurt am Main Warren, MI 48090-9020 Bahnhofstrasse 18
Germany United States of America 85609 Aschheim Dornach
Germany
DENSO CORP. NXP BV Volkswagen AG
1-1, Showa-cho, Kariya-shi High Tech Campus 60 PO Box 011/1770
Aichi-ken 448-8661 5656 AG Eindhoven 38436 Wolfsburg
Japan The Netherlands Germany
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. ISO shall not be held responsible for identifying any
or all such patent rights. ISO (www.iso.org/patents) maintains on-line databases of patents relevant
to their standards. Users are encouraged to consult the databases for the most up to date information
concerning patents.
vi © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 11898-2:2016(E)
Road vehicles — Controller area network (CAN) —
Part 2:
High-speed medium access unit
1 Scope
This document specifies the high-speed physical media attachment (HS-PMA) of the controller area
network (CAN), a serial communication protocol that supports distributed real-time control and
multiplexing for use within road vehicles. This includes HS-PMAs without and with low-power mode
capability as well as with selective wake-up functionality. The physical media dependant sublayer is
not in the scope of this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11898-1:2015, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical
signalling
ISO 16845-2, Road vehicles — Controller area network (CAN) conformance test plan — Part 2: High-speed
medium access unit with selective wake-up functionality
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11898-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
NOTE See Figure A.1 for a visualization of the definitions.
3.1
attachment unit interface
AUI
interface between the PCS that is specified in ISO 11898-1 and the PMA that is specified in this document
3.2
ground
GND
electrical signal ground
3.3
legacy implementation
HS-PMA implementation that has been released prior to the publication of this document
3.4
low-power mode
mode in which the transceiver is not capable of transmitting or receiving messages, except for the
purposes of determining if a WUP or WUF is being received
3.5
medium attachment unit
MAU
unit that comprises the physical media attachment and the media dependent interface
3.6
media dependent interface
MDI
interface that ensures proper signal transfer between the media a
...