ISO 20794-7:2020

Road vehicles — Clock extension peripheral interface (CXPI) — Part 7: Data link and physical layer conformance test plan

This document specifies the conformance test plans for the CXPI data link layer and the CXPI physical layer. It also specifies the conformance test plan for error detection. Additionally, this document describes the concept of conformance test plan operation.

Véhicules routiers — Interface périphérique d’extension d'horloge (CXPI) — Partie 7: Plan de test de conformité des couches de liaison de données et physique

General Information

• Status: Published
• Publication Date: 29-Oct-2020
• 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: 6060 - International Standard published
• Start Date: 30-Oct-2020
• Due Date: 11-May-2020
• Completion Date: 30-Oct-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20794-7
First edition
2020-10
Road vehicles — Clock extension
peripheral interface (CXPI) —
Part 7:
Data link and physical layer
conformance test plan
Véhicules routiers — Interface périphérique d’extension d'horloge
(CXPI) —
Partie 7: Plan de test de conformité des couches de liaison de données
et physique
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
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Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 1
4.1 Symbols . 1
4.2 Abbreviated terms . 2
5 Conventions . 3
6 General test specification considerations . 3
6.1 General . 3
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 Default configurations . 8
6.6.4 L_ErrDet1 configurations . 8
6.6.5 L_ErrDet2 configurations . 8
6.6.6 L_Arbit configurations . . 8
6.6.7 L_Unknown configurations . 8
6.7 SUT initialisation . 8
6.8 Additional test system set-up capabilities . 9
6.8.1 CXPI network data generator . 9
6.8.2 TXD data generator .11
6.8.3 TX data generator .13
PWM
6.8.4 RX data generator .14
PWM
6.8.5 Other requirements .16
7 Data link layer conformance test plan .16
7.1 General .16
7.2 CTP – Timing parameters .16
7.2.1 2.CTC_1.1 – IBS length .16
7.2.2 2.CTC_1.2 – IFS length .17
7.2.3 2.CTC_1.3 – Frame reception starting condition 1 without the error bit .18
7.2.4 2.CTC_1.4 – Frame reception starting condition 1 with the error bit .18
7.2.5 2.CTC_1.5 – Frame reception starting condition 2 without the error bit .19
7.2.6 2.CTC_1.6 – Frame reception starting condition 2 with the error bit .20
7.2.7 2.CTC_1.7 – Frame reception starting condition 3 .20
7.2.8 2.CTC_1.8 – Maximum length of the frame .21
7.3 CTP – Frame transmission/reception .22
7.3.1 2.CTC_2.1 – Response to L_PID field.22
7.3.2 2.CTC_2.2 – L_PID field transmission .23
7.3.3 2.CTC_2.3 – L_PTYPE field transmission .23
7.3.4 2.CTC_2.4 – L_PTYPE field response function .24
7.3.5 2.CTC_2.5 – L_FI_DLC ≠ 1111 and frame data verification 1.25
7.3.6 2.CTC_2.6 – L_FI_DLC ≠ 1111 and frame data verification 2 if DLC is
1101 or 1110 (Ftype = NormalCom) .26
2 2
7.3.7 2.CTC_2.7 – L_FI_DLC = 1111 /L_FI_DLCext ≥ 0 and frame data verification .27
7.3.8 2.CTC_2.8 – Given CRC of frame with L_FI_DLC ≠ 1111 .28
7.3.9 2.CTC_2.9 – Given CRC of frame with L_FI_DLC = 1111 /L_FI_DLCext ≥ 0 .29
7.3.10 2.CTC_2.10 – Frame transmission completion .30
7.3.11 2.CTC_2.11 – Frame reception completion .30
7.4 CTP – Network access .31
7.4.1 2.CTC_3.1 – Arbitration function 1 (arbitration by using carrier sense) .31
7.4.2 2.CTC_3.2 – Arbitration function 2 (IUT loses arbitration and transitions
into receiving state).32
7.5 CTP – Error detection .33
7.5.1 2.CTC_4.1 – Byte error .33
7.5.2 2.CTC_4.2 – CRC error .35
7.5.3 2.CTC_4.3 – Parity error of the L_PID field without the error bit .36
7.5.4 2.CTC_4.4 – Parity error of the L_PID field with the error bit .37
7.5.5 2.CTC_4.5 – Parity error of the L_PTYPE field without the error bit .37
7.5.6 2.CTC_4.6 – Parity error of the L_PTYPE field with the error bit .38
7.5.7 2.CTC_4.7 – Data length code error with L_FI_DLC ≠ 1111 .39
7.5.8 2.CTC_4.8 – Data length error with L_FI_DLC = 1111 /L_FI_DLCext ≥ 0 .40
7.5.9 2.CTC_4.9 – Data length code error L_FI_DLC ≠ 1111 and if DLC is 1101
2 2
or 1110 (Ftype = DiagNodeCfg) .41
7.5.10 2.CTC_4.10 – Data length code error L_FI_DLC = 1111 /L_FI_DLCext ≤ 12
(Ftype = DiagNodeCfg) .42
7.5.11 2.CTC_4.11 – Framing error in receiving node .43
7.5.12 2.CTC_4.12 – Framing error in transmitting node .44
7.5.13 2.CTC_4.13 – Ignore error (no support of L_FI_DLC = 1111 ) .44
8 Physical layer conformance test plan (PMA – PS separate type) .45
8.1 CTP – Operational conditions and calibration .45
8.1.1 Initial configuration.45
8.1.2 1.CTC_1.1 – Clock transmission 1 .46
8.1.3 1.CTC_1.2 – Clock transmission 2 .47
8.1.4 1.CTC_1.3 – Clock transmission 3 .49
8.1.5 1.CTC_1.4 – Detection of clock existence .51
8.1.6 1.CTC_1.5 – Arbitration function (stop transmission by arbitration) .52
8.1.7 1.CTC_1.6 – Operating voltage range .54
8.1.8 1.CTC_1.7 – Bit synchronisation .55
8.2 CTP – Wake-up pulse .57
8.2.1 General.
...