ISO 20794-5:2020

INTERNATIONAL ISO
STANDARD 20794-5
First edition
2020-10
Road vehicles — Clock extension
peripheral interface (CXPI) —
Part 5:
Application layer conformance test
plan
Véhicules routiers — Interface périphérique d’extension d'horloge
(CXPI) —
Partie 5: Plan de test de conformité de la couche application
Reference number
©
ISO 2020
© ISO 2020
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 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 Conventions . 4
6 General test specification considerations . 4
6.1 General . 4
6.2 Test conditions . 4
6.3 IUT requirements. 4
6.4 CTC definition . 4
6.5 Test system set-up . 5
6.6 Configuration of test system and IUT . 6
6.6.1 General. 6
6.6.2 IUT-specific set-up parameters . 7
6.6.3 User_Specific configurations. 8
6.6.4 W/S_Init configurations . . . 8
6.6.5 W/S_Passive configurations . 8
6.6.6 W/S_RdySleep configurations . 8
6.6.7 W/S_NotRdySleep configurations . 8
6.6.8 A_WSSup configurations . 9
6.6.9 NonW/S configurations . 9
6.6.10 ErrDet configurations . 9
6.6.11 Event configurations . . 9
6.6.12 Polling configurations . 9
6.7 SUT initialisation .10
6.7.1 General.10
6.7.2 Default initialisation .10
6.7.3 Sleep initialisation .10
6.7.4 Power-off initialisation .10
6.7.5 Transmission prohibition initialisation .10
6.7.6 Clock supply of secondary clock master initialisation .10
7 Application conformance test plan .10
7.1 General .10
7.2 Network management .10
7.2.1 General.10
7.2.2 State transition definition .11
7.2.3 State transition CTCs .11
7.2.4 Wake-up request/notification of master node trigger CTCs.15
7.2.5 Wake-up request/notification of slave node trigger CTCs.18
7.2.6 Sleep request/notification CTCs .25
7.2.7 Network Management multi clock master processing CTCs .31
7.3 Fault management .34
7.3.1 Error detection/recovery CTCs .34
7.3.2 CXPI network error CTCs .41
7.3.3 SCT error CTCs .42
7.3.4 Error notification between CXPI nodes CTCs .43
8 Application layer conformance test plan .45
8.1 General .45
8.2 Transfer management CTCs .45
8.2.1 General.45
8.2.2 7.CTC_10.1 – Master node event-triggered method .45
8.2.3 7.CTC_10.2 – Slave node event-triggered method .46
8.2.4 7.CTC_10.3 – Master node polling method .46
8.2.5 7.CTC_10.4 – Slave node polling method .47
8.2.6 7.CTC_10.5 – Behaviour of unknown or invalid ReqId reception .48
8.2.7 7.CTC_10.6 – Master node sets unused bits in response message .48
8.2.8 7.CTC_10.7 – Slave node sets unused bits in response message .49
Bibliography .51
iv © ISO 2020 – All rights reserved

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 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.
A list of all parts in the ISO 20794 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
ISO 20794 (all parts) specifies the application (partly), application layer, transport layer, network
layer, data link layer, and physical layer requirements of an in-
...