SAE J2411-2000 Single Wire CAN Network for Vehicle Applications.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/w
3、ww.sae.org Copyright 2000 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American National Standard J2411 ISSUED FEB2000 Issued2000-02 Single Wire CAN N
4、etwork for Vehicle Applications ForewordThe objective of this SAE Standard is to define a level of standardization in the implementation of low speed vehicle serial data network communications using the Controller Area Network (CAN) protocol. This low speed implementation of CAN is intended to provi
5、de a lower cost complement to the SAE J2284 High Speed CAN standard. The goal of this document is to define a serial data physical layer, data link layer and media design criteria to be installed in various automotive Electronic Control Units (ECU). This document will allow ECU and tool manufacturer
6、s to satisfy the needs of multiple end users with minimum modifications to the basic design. This document will benefit vehicle Original Equipment Manufacturers by achieving lower ECU costs due to higher industry volumes of the basic design. TABLE OF CONTENTS 1.Scope . 3 1.1Mission/Theme. 3 2.Refere
7、nces. 3 2.1Applicable Publications 3 2.1.1SAE Publications 3 2.1.2ISO Publications. 3 2.1.3Supplier Publications 3 2.1.4Other Publications 4 3.Definitions. 4 3.1Data Link Layer 4 3.2Dominant Signal. 4 3.3Media 4 3.4Physical Layer 4 3.5Protocol 4 3.6Radiated Emissions 4 3.7Radiated Immunity . 4 3.8Re
8、cessive Signal 4 4.Acronyms, Abbreviations, and Symbols. 4 SAE J2411 Issued FEB2000 -2- 5.Single Wire CAN System Requirements.4 5.1Physical and Data Link Layer Characteristics.4 5.2Message Format.5 5.3Bus Operation.5 5.3.1Normal Communication Mode 5 5.3.2High Speed Communication Mode.5 5.3.3ECU Sele
9、ctive Awake.7 5.3.4CAN Controller Clock Tolerance.7 5.3.5Bus Electrical Parameters 7 5.4Network Topology.9 5.4.1Loss of ECU Ground.9 5.4.2Bus Electrical Load Distribution11 5.4.3ESD Immunity.12 5.4.4ESD Transient Suppressor.12 5.4.5Bus Wiring Topology Configurations 12 5.4.6Bus Wiring Constraints .1
10、4 5.4.7Bus Wiring Practices to Improve EMC Performance16 5.4.8Bus Wiring Harness and ECU Connectors.16 5.5Radiated EMI Protection.17 5.6Fault Tolerant Modes17 5.7Ground Offset Voltage17 5.8Operating Battery Power Voltage Range17 5.8.1Normal Battery Voltage Power Operation.17 5.8.2Battery Power Overv
11、oltage Operation18 5.8.3Low Battery Voltage Operation.18 5.8.4Battery Offset Voltage.18 5.8.5Reverse Battery Blocking Diode.18 5.9Environmental Requirements .18 6.Single Wire CAN Transceiver Specification18 6.1Transceiver Pin Descriptions18 6.1.1GND Pin-Ground 19 6.1.2TxD Input Pin19 6.1.3Mode 0 and
12、 Mode 1 Input Pins.19 6.1.4RxD Output Pin.20 6.1.5VccIC Input Pin.20 6.1.6RSLEW Input Pin20 6.1.7Bus LOAD Input Pin20 6.1.8VBATT IC Input PIN 21 6.1.9CAN_Bus Input/Output Pin.21 6.1.10Transmit Operating Conditions.22 6.1.11Transceiver Mode Changes23 6.1.12Maximum Transceiver Propagation Delays23 6.1
13、.13Transceiver Electrostatic Discharge Immunity23 7.Validation24 Appendix A Single Wire CAN Bit Timing Analysis25 Appendix B Single Wire CAN High Speed Mode Analysis.27 Appendix C Nested SWC and DWC IC PC Board Layout32 SAE J2411 Issued FEB2000 -3- 1.ScopeThis SAE Recommended Practice defines the Ph
14、ysical Layer and portions of the Data Link Layer of the OSI model for data communications. In particular, this document specifies the physical layer requirements for any Carrier Sense Multiple Access/Collision Resolution (CSMA/CR) data link which operates on a single wire medium to communicate among
15、 Electronic Control Units (ECU) on road vehicles. Requirements stated in this document will provide a minimum standard level of performance to which all compatible ECUs and media shall be designed. This will assure full serial data communication among all connected devices regardless of supplier. Th
16、is document is to be referenced by the particular vehicle OEM Component Technical Specification which describes any given ECU in which the single wire data link controller and physical layer interface is located. Primarily, the performance of the physical layer is specified in this document. ECU env
17、ironmental and other requirements when provided in the Component Technical Specification, shall supercede the requirements of this document. The intended audience includes, but is not limited to, ECU suppliers, CAN controller suppliers, CAN transceiver suppliers, component release engineers, and veh
18、icle system engineers. 1.1Mission/ThemeThis specification describes the physical layer requirements for a single wire data link capable of operating with various CSMA/CR protocols such as the Bosch Controller Area Network (CAN) version 2.0. This serial data link network is intended for use in applic
19、ations where high data rate is not required and a lower data rate can achieve cost reductions in both the physical media components and in the microprocessor and/or dedicated logic devices which use the network. 2.References 2.1Applicable PublicationsThe following publications form a part of this sp
20、ecification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J551All partsPerformance Levels and Methods of Measurement of Electromagnetic Co
21、mpatibility for Vehicles and Devices SAE J1113All partsElectromagnetic Compatibility Measurement Procedures for Vehicle Components SAE J1213-1Glossary of Vehicle Networks for Multiplexing and Data Communications SAE J1930Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations and
22、Acronyms SAE J2284High Speed CAN (HSC) for Vehicle Applications at 500 KBPS SAE 970295Optimization of CAN Bit Timing Parameters 2.1.2ISO DOCUMENTSAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ISO 7498Data processing systemsOpen systems interconnection standard reference mode ISO
23、 7637Road vehiclesElectrical interference by conduction and couplingParts 1 and 2 2.1.3SUPPLIER PUBLICATIONS Delphi - Delco Electronics Automotive Systems - DK166153 - Single Wire CAN Transceiver Philips - AU5790 - Single Wire CAN Transceiver Infineon - TLE 6255 - Single Wire CAN Transceiver SAE J24
24、11 Issued FEB2000 -4- 2.1.4OTHER PUBLICATIONS Bosch Controller Area Network 2.0 specification CISPR 25 - Limits & Methods of Measurement of Radio Disturbance Characteristics for the Protection of Receivers used on board vehicles. 3.Definitions 3.1Data Link LayerThis provides for the reliable transfe
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