1、BSI Standards PublicationBS ISO 11898-6:2013Road vehicles Controllerarea network (CAN)Part 6: High-speed medium access unit withselective wake-up functionalityBS ISO 11898-6:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 11898-6:2013.The UK participation
2、in its preparation was entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are respon
3、sible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 78537 5ICS 43.040.15Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards P
4、olicy and Strategy Committee on 30 November 2013.Amendments issued since publicationDate Text affectedBS ISO 11898-6:2013 ISO 2013Road vehicles Controller area network (CAN) Part 6: High-speed medium access unit with selective wake-up functionalityVhicules routiers Gestionnaire de rseau de communica
5、tion CAN Partie 6: Unit daccs au mdium haute vitesse avec fonctionnalit de rveil slectifINTERNATIONAL STANDARDISO11898-6First edition2013-11-01Reference numberISO 11898-6:2013(E)BS ISO 11898-6:2013ISO 11898-6:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reser
6、ved. 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
7、 at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 11898-6:2013ISO 11898-6:2013(E) ISO 2013 All rights reserved
8、iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols and abbreviated terms . 35 Functional description of medium access unit (MAU) with selective wake-up functionality 45.1 General . 45.2 Compliance classes 45.3 Configuration and status dat
9、a 45.4 Physical medium attachment sublayer specification. 56 Conformance tests .127 Electrical specification of high-speed medium access unit (HS-MAU) 127.1 Physical medium attachment sublayer specification127.2 CAN transceiver . 12Bibliography .14BS ISO 11898-6:2013ISO 11898-6:2013(E)ForewordISO (t
10、he 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 commit
11、tee 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 electrotech
12、nical 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
13、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.
14、 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
15、an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee
16、 responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment.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
17、 access unit Part 3: Low-speed, fault-tolerant, medium-dependent interface Part 4: Time-triggered communication Part 5: High-speed medium access unit with low-power mode Part 6: High-speed medium access unit with selective wake-up functionalityiv ISO 2013 All rights reservedBS ISO 11898-6:2013ISO 11
18、898-6:2013(E)IntroductionThis International Standard was first published as one document in 1993. It covered the controller area network (CAN) data link layer, as well as the high-speed physical layer.In the reviewed and restructured ISO 11898 series: ISO 11898-1 describes the data link layer includ
19、ing the logical link control (LLC) sublayer and the medium access control (MAC) sublayer as well as the physical signalling (PHS) sublayer; ISO 11898-2 defines the high-speed medium access unit (MAU); ISO 11898-3 defines the low-speed fault-tolerant medium access unit (MAU); ISO 11898-4 defines the
20、time-triggered communication; ISO 11898-5 defines the power modes of the high-speed medium access unit (MAU); ISO 11898-6 defines the selective wake-up functionality of the high-speed medium access unit (MAU). ISO 2013 All rights reserved vBS ISO 11898-6:2013BS ISO 11898-6:2013Road vehicles Controll
21、er area network (CAN) Part 6: High-speed medium access unit with selective wake-up functionality1 ScopeThis part of ISO 11898 specifies the controller area network (CAN) physical layer for transmission rates up to 1 Mbit/s. It describes the medium access unit (MAU) functions.This part of ISO 11898 r
22、epresents an extension of ISO 11898-2 and ISO 11898-5, specifying a selective wake-up mechanism using configurable CAN frames.Physical layer implementations according to this part of ISO 11898 are compliant with all parameters of ISO 11898-2 and ISO 11898-5. Implementations according to this part of
23、 ISO 11898, ISO 11898-2, and ISO 11898-5 are interoperable and can be used at the same time within one network.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edi
24、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7637-3, Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other t
25、han supply linesISO 11898-1, Road vehicles Controller area network (CAN) Part 1: Data link layer and physical signallingISO 11898-2:2003, Road vehicles Controller area network (CAN) Part 2: High-speed medium access unitISO 11898-5:2007, Road vehicles Controller area network (CAN) Part 5: High-speed
26、medium access unit with low-power mode3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 11898-1, ISO 11898-2, and ISO 11898-5 and the following apply.3.1bias unitsubpart of the transceiver which provides the biasing voltageNote 1 to entry: Figure 1 depi
27、cts the subparts of a transceiver.3.2bit ratenumber of bits per time during transmission, independent of bit representation3.3CAN nodecommunication participant of the CAN system which contains typically a transceiver, a CAN controller, and a processing unitINTERNATIONAL STANDARD ISO 11898-6:2013(E)
28、ISO 2013 All rights reserved 1BS ISO 11898-6:2013ISO 11898-6:2013(E)3.4CAN controllersubpart of a CAN node which implements the data link layer protocol and the physical signalling as defined in ISO 11898-13.5data mask bitoptional configuration bit to disable the data length code (DLC) and data fiel
29、d judgment for the wake-up frame validation3.6decoding unitsubpart of the control unit with selective wake-up function which analyses the CAN communication to detect wake-up framesNote 1 to entry: Figure 1 depicts the subparts of a transceiver.3.7mode control unitsubpart of the transceiver with sele
30、ctive wake-up function which controls all functions and other subparts of a transceiverNote 1 to entry: Figure 1 depicts the subparts of a transceiver.3.8selective wake-upfunctionality of a transceiver to make the operation of a CAN system with partial networking possible3.9receiversubpart of the tr
31、ansceiver which is responsible to transform physical bus signals to logical signals and provides them to the CAN controllerNote 1 to entry: Figure 1 depicts the subparts of a transceiver.3.10transceivercomponent that adapts logical signals to the physical layer and vice versaNote 1 to entry: Figure
32、1 depicts the subparts of a transceiver.3.11transmittersubpart of a transceiver which is responsible to transform logical signals to physical bus signals and sets them on the busNote 1 to entry: Figure 1 depicts the subparts of a transceiver.3.12CAN activity filter time (of a CAN node)tFilterduratio
33、n of dominant and recessive bus-levels on the bus lines CAN_H and CAN_L for detecting activity on the CAN bus3.13wake-up frameCAN frame which causes a wake-up of one or more CAN nodes after being analysed2 ISO 2013 All rights reservedBS ISO 11898-6:2013ISO 11898-6:2013(E)Figure 1 Subparts of a trans
34、ceiver3.14wake-up patterntwo periods of dominant bus-levels, separated by a period of recessive bus-level each of at least tFilter4 Symbols and abbreviated termsFor the purposes of this document, the symbols and abbreviated terms given in ISO 11898-1, ISO 11898-2, and ISO 11898-5 and the following a
35、pply.ID Identifier fieldPHS Physical signallingRINInternal receiver input resistorsVCAN_HVoltage on CAN_H bus lineVCAN_LVoltage on CAN_L bus lineVdiffDifferential CAN voltage ( = VCAN_H VCAN_L)WUF Wake-up frameWUP Wake-up pattern ISO 2013 All rights reserved 3BS ISO 11898-6:2013ISO 11898-6:2013(E)5
36、Functional description of medium access unit (MAU) with selective wake-up functionality5.1 GeneralThis specification discloses the respective hardware functionalities for CAN high-speed transceivers with selective wake-up capability. The transceivers with this capability shall be interoperable with
37、CAN transceivers according to ISO 11898-2 and ISO 11898-5 (for details, see Clause 7).If CAN transceivers with selective wake-up function are used, it is possible to define sub-networks of nodes, which only change to active state if they receive a configured wake-up frame.The node state is changed f
38、rom inactive to active only if the transceiver has received a frame and accepted it as a wake-up event. Acceptance of a CAN frame as a wake-up event is done by the mode control unit of the transceiver by comparing configured and received ID and, if not disabled, DLC and data. Configuration is done v
39、ia implementation specific interfaces (e.g. host interface). In case of erroneous communication, the transceiver shall wake-up upon or after an overflow of the internal error counter.CAN transceivers with selective wake-up function are able to recognize and decode CAN frames by the decoding unit. An
40、 automatic voltage biasing function at CAN_H and CAN_L is used in CAN transceivers with selective wake-up function.5.2 Compliance classesThe following compliance classes are defined. Compliant to ISO 11898-6:The CAN transceiver fulfils all requirements of this part of ISO 11898. Compliant to automat
41、ic voltage biasing as defined in ISO 11898-6:The CAN transceiver fulfils only the requirements of the automatic voltage biasing at the CAN pins (see 5.4.3.2).5.3 Configuration and status data5.3.1 GeneralThe transceiver shall support read access to all its configuration data.5.3.2 List of configurat
42、ion dataThe following configuration data are given. ID (mandatory) ID mask (mandatory) DLC (mandatory) Data field bits (mandatory) Bit rate (mandatory) Data mask bit (optional) Frame error counter overflow threshold value (optional)4 ISO 2013 All rights reservedBS ISO 11898-6:2013ISO 11898-6:2013(E)
43、5.3.3 List of status dataFurthermore, the following status data are defined. Frame error counter value (optional)5.3.4 Optional support of data mask bitOptionally, a data mask bit can be implemented to indicate if the DLC and data field bits shall be part of the WUF validation (data mask bit set) or
44、 if only the ID field shall be considered for the WUF validation (data mask bit not set).If the data mask bit is not implemented, the DLC and data field bits shall be part of the WUF validation.5.4 Physical medium attachment sublayer specification5.4.1 GeneralTwo different termination models are rec
45、ommended for the high-speed medium access unit according to Figure 2: termination with single resistor between CAN_H and CAN_L; split termination dividing the single resistor into two resistors with same value in series connection, while the centre tap is connected to a grounding capacitor and optio
46、nally to a dedicated split supply.Figure 2 Termination variants, single-resistor termination, and split terminationIn order to support low-power functionality, two different modes of operation are defined as follows. Normal mode: (as defined in ISO 11898-2) Low-power mode, which is split into the tw
47、o following sub-states: without selective wake-up function: (as defined in this part of ISO 11898 and in ISO 11898-5) with selective wake-up function: (as defined in this part of ISO 11898)5.4.2 Bus levels during normal modeThe CAN bus lines have one of the two logical states: recessive or dominant
48、(see Figure 3).The bus lines are in recessive state if the transmitters of all CAN nodes are switched off. In this case, the mean bus voltage is generated by the termination and by the internal resistance of each CAN nodes receiver. In the recessive state, VCAN_Hand VCAN_Lare fixed to a mean voltage
49、 level determined by the bus termination. Vdiffis less than a maximum threshold. The recessive state is transmitted during bus idle (see ISO 11898-1) or a recessive bit. Figure 3 illustrates the maximum allowed differential recessive bus voltage. Typically, the differential voltage is about 0 V. ISO 2013 All rights reserved 5BS ISO 11898-6:2013ISO 11898-6:2013(E)Optionally, the recessive bus state can be stabilized, making use of a dedicated split termination voltage (VSplit). This o
