1、 ISO 2016 Road vehicles Controller area network (CAN) Part 2: High-speed medium access unit Vhicules routiers Gestionnaire de rseau de communication (CAN) Partie 2: Unit daccs au support haute vitesse INTERNATIONAL STANDARD ISO 11898-2 Second edition 2016-12-15 Reference number ISO 11898-2:2016(E) I
2、SO 11898-2:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT 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 phot
3、ocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 2
4、2 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 11898-2:2016(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms 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
5、 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 CAN_H , V CAN_Land V Diff11 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
6、12 5.9.2 Basic wake-up13 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
7、 .29 Bibliography .30 ISO 2016 All rights reserved iii Contents Page ISO 11898-2:2016(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
8、 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 col
9、laborates 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 appr
10、oval 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
11、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
12、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 conformit y assessment, as well as information about ISOs adherence to the World Trade Organiz
13、ation (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
14、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 b
15、een 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
16、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
17、 2016 All rights reserved ISO 11898-2:2016(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, ISO 11898-1 and ISO 11898-4 defined the CAN protocol and t
18、ime-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.
19、Key AUI attachment unit interface MDI media dependant interface OSI open system interconnection F i g u r e 1 O v e r v i e w o f I S O 1 1 8 98 s p e c i f i c a t i o n s e r i e s The International Organization for Standardization (ISO) draws attention to the fact that it is claimed that complian
20、ce 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 r
21、easonable 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: ISO 2016 All rights reserved v ISO 11898-2:2016(E) Audi AG August-Horc
22、h-Str. 85045 Ingolstadt Germany Elmos Semiconductor AG Heinrich-Hertz-Str. 1 44227 Dortmund Germany Renesas Electronics Europe GmbH Arcadiastr. 10 40472 Dsseldorf Germany BMW Group Knorrstr. 147 80788 Mnchen Germany Freescale Semiconductor Inc. 6501 W. William Canon Drive Austin, Texas United States
23、 Robert Bosch GmbH PO Box 30 02 20 70442 Stuttgart Germany Continental Teves AG so no other HS-PMA implementations are connected to the media. The behaviour of an HS-PMA implementation connected to other HS-PMAs is outside the scope of this subclause. Refer to A.2 for consideration when multiple HS-
24、PMAs are connected to the same media. The voltages and currents that are required on the CAN_L and CAN_H signals are specified in Tables 2 to 6. Table 2 specifies the output characteristics during dominant state. Figure 3 illustrates the voltage range for the dominant state.4 ISO 2016 All rights res
25、erved ISO 11898-2:2016(E) Table 2 HS-PMA dominant output characteristics Parameter Notation Value Condition Min V Nom V Max V Single ended voltage on CAN_H V CAN_H +2,75 +3,5 +4,5 R L= 50 65 Single ended voltage on CAN_L V CAN_L +0,5 +1,5 +2,25 R L= 50 65 Differential voltage on normal bus load V Di
26、ff +1,5 +2,0 +3,0 R L= 50 65 Differential voltage on effective resistance during arbitration V Diff +1,5 Not defined +5,0 R L= 2 240 a Optional: Differential voltage on extended bus load range V Diff +1,4 +2,0 +3,3 R L= 45 70 a2 240 is emulating a situation with up to 32 nodes sending dominant simul
27、taneously. In such case, the effective load resistance for a single node decreases (a node does drive only a part of the nominal bus load). Assuming a MAX R Lof 70 , this scenario covers a 32 nodes network. (2 240 /70 per node = 32 nodes.) All requirements in this table apply concurrently. Therefore
28、 not all combinations of V CAN_Hand V CAN_Lare compliant with the defined differential voltage (see Figure 3). Measurement setup according to Figure 2 (only one HS-PMA present): R L , see “Condition” column above C 1= 0 pF (not present) C 2= 0 pF (not present) C RXD= 0 pF (not present) Key V Diff d
29、ifferential voltage between CAN_H and CAN_L wires V CAN_H single ended voltage on CAN_H wire V CAN_L single ended voltage on CAN_L wire Figure 3 Voltage range of V CAN_Hduring dominant state of CAN node, when V CAN_Lvaries from m i n i m u m t o m a x i m u m v o l t a g e l e v e l ( 5 0 6 5 b u s l o a d c o n d i t i o n ) ISO 2016 All rights reserved 5
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