SAE J 2602-2-2012 LIN Network for Vehicle Applications Conformance Test.pdf

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4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2602/2_201211SURFACE VEHICLE RECOMMENDED PRACTICE J2602-2 NOV2012 Issued 2005-09

5、 Revised 2012-11 Superseding J2602-2 SEP2005 LIN Network for Vehicle Applications Conformance Test RATIONALE Usage of SAE J2602-2 over the past few years have uncovered some errors in the tests and typos in the documents. As new parts have been developed with additional functionality questions have

6、been raised as to the preferred behavior of these devices. The release of the spec corrects these errors and answers the known questions that have arisen. This update has removed references to the LIN 2.0 Conformance tests and has replaced them with tests in this document such that this document inc

7、ludes the entire required J2602-1 test suite. FOREWORD The objective of this document is to define a standard conformance test for SAE J2602-1 devices. The goal of this document is to define a basic conformance test for SAE J2602-1 Master and Slave nodes that can be used to determine the suitability

8、 of devices for use. This is not a complete Qualification test. This does not replace the individual suppliers IC and/or module qualification. TABLE OF CONTENTS 1. SCOPE 3 1.1 Mission/Theme 4 1.2 Overview . 4 1.3 Relationship to the LIN Conformance Test Specification . 4 2. REFERENCES 5 2.1 Applicab

9、le Documents 5 2.1.1 SAE Publications . 5 2.1.2 ISO Documents . 5 2.1.3 Supplier Publications 5 2.1.4 Other Publications . 5 3. DEFINITION OF TERMS 5 4. ACRONYMS, ABBREVIATIONS, AND SYMBOLS 6 SAE J2602-2 Revised NOV2012 Page 2 of 66 5. LIN SYSTEM REQUIREMENTS . 6 5.1 LIN Specification Package 7 5.2

10、J2602-1 Serial Data Link Characteristics 7 5.3 Detection of Errors by Master (reference 4.1, LIN 2.0 Protocol Specification) . 7 5.4 Frame Processing by Slave Tasks (reference 4.2.2, LIN 2.0 Protocol Specification) 8 5.4.1 Slave Node Error Behavior . 8 5.4.2 Slave Task in a Master Node Error Behavio

11、r . 10 5.5 Master and Slave Message Transmission Time Tolerance (reference 2.2, LIN 2.0 Protocol Specification) . 11 5.5.1 Length of SYNCH BREAK LOW PHASE (DUT as Master) 12 5.5.2 Variation of Length of SYNCH BREAK LOW PHASE (DUT as Slave). 12 5.5.3 Length of SYNCH BREAK DELIMITER (DUT as Master) 13

12、 5.5.4 Variation of Length of SYNCH BREAK DELIMITER (DUT as Slave) . 13 5.5.5 Length of Header (DUT as Master) 14 5.5.6 Variation of Length of Header (DUT as Slave) . 14 5.5.7 Length of Frame (DUT as Slave Answering to a Master Request) 15 5.6 LIN Product Identification (reference 2.4, LIN 2.0 Diag

13、and Config Specification) . 15 5.7 Mandatory Node Configuration Requests (reference LIN 2.0 Diag and Config Specification) 16 5.7.1 General Configuration Requirements . 16 5.7.2 NAD and Message ID Assignment . 17 5.7.3 Targeted Reset . 22 5.7.4 Broadcast Reset Slave Response (DUT as Slave) 22 5.8 Ma

14、ster and Slave Message Format 24 5.8.1 Checksum (reference 2.1.5, LIN 2.0 Protocol Specification) 24 5.8.2 Signal Consistency (reference 1.2, LIN 2.0 Protocol Specification) . 24 5.8.3 Signal Encoding Types (reference 1.1, LIN 2.0 Protocol Specification) . 24 5.8.4 Signal Management 24 5.8.5 Unused

15、Bits in the Data Field (reference 2.3, LIN 2.0 Protocol Specification) . 24 5.8.6 J2602-1 Slave Status Byte 24 5.9 Message Types . 24 5.9.1 Availability of Unconditional Frames (reference 2.3.1, LIN 2.0 Protocol Specification) . 24 5.9.2 Event Triggered Frames (reference 2.3.2, LIN 2.0 Protocol Spec

16、ification) 24 5.9.3 Sporadic Frame (reference 2.3.3, LIN 2.0 Protocol Specification) . 25 5.10 Large Calibration Configuration 25 5.10.1 Calibrating/Configuring a Slave 25 5.10.2 Slave Part Number Reporting . 26 5.11 Small Calibration Configuration 26 6. J2602-1 API REQUIREMENTS 27 6.1 Master Node C

17、onfiguration API 27 6.2 Diagnostic Transport Layer API 27 6.3 Additional API Requirements 27 7. J2602-1 BUS OPERATION 28 7.1 Normal Communication Mode and Transmission Rate 28 7.1.1 Master Node Bit Time Measurement 28 7.1.2 Slave Node Bit Time Measurement 29 7.2 Sleep/Wake Mode in Master and Slave 3

18、1 7.2.1 Wake-up of Master and Slave (reference 5.1, LIN 2.0 Protocol Specification) 32 7.2.2 Go To Sleep (reference 5.2, LIN 2.0 Protocol Specification) 34 7.3 LIN Controller Clock Tolerance . 36 7.4 Bus Electrical Parameters . 36 7.4.1 LIN Bus Signals and Loading Requirements 37 7.5 Master / Slave

19、LIN Data Link (UART) Requirements . 49 7.5.1 Sample Point . 50 7.5.2 Synchronization . 53 7.5.3 Transmit Message Buffering . 53 SAE J2602-2 Revised NOV2012 Page 3 of 66 7.6 LIN ECU Requirements 53 7.6.1 ECU Circuit Requirements 53 7.6.2 Board Layout Requirements . 54 7.7 Network Topology . 54 7.7.1

20、Loss of ECU Ground at Master or Slave Node . 54 7.7.2 Loss of ECU Battery 55 7.7.3 Bus Electrical Load Distribution 55 7.7.4 Bus Wiring Topology Configurations 55 7.7.5 Bus wiring constraints . 55 7.7.6 Bus Wiring Practices to Improve EMC Performance 55 7.7.7 Bus Wiring Harness and ECU connectors 55

21、 7.8 Master / Slave ESD Immunity . 55 7.9 Master / Slave EMC Testing Requirements 55 7.10 Fault Tolerant Modes 55 7.10.1 ECU Power Loss - Master / Slave 56 7.10.2 Bus Wiring Short to Ground - Master / Slave . 57 7.10.4 Bus Wiring Short to Battery . 58 7.10.5 Short / Open in Other Circuits . 60 7.11

22、Ground Offset Voltage 60 7.12 Operating Battery Power Voltage Range 60 7.12.1 Normal Battery Voltage Power Operation . 60 7.12.2 Battery Power Over-Voltage Operation 62 7.12.3 Low Battery Voltage Operation . 63 7.12.4 Battery Offset Voltage . 64 7.12.5 Reverse Battery Blocking Diode . 64 7.13 Enviro

23、nmental Requirements 64 7.13.1 Transmit Operating Conditions . 64 8. NOTES 65 8.1 Marginal Indicia . 65 1. SCOPE This document covers the tests to be performed on all SAE J2602-1 defined Master and Slave nodes. Tests described in this document will ensure a minimum standard level of performance to w

24、hich all compatible Electronic Control Unit (ECUs) and media shall be designed. This will assure full serial data communication among all connected devices regardless of supplier. The goal of SAE J2602-2 is to improve the interoperability and interchangeability of LIN devices within a network by ver

25、ifying the devices pass a minimum set of tests. To allow for easy cross-reference, this document is arranged such that the conformance test for a given section in SAE J2602-1 is in the same section in SAE J2602-2. This document is to be referenced by the particular vehicle Original Equipment Manufac

26、turer (OEM) component technical specification that describes any given ECU in which the LIN data link controller and physical layer interface is located. Primarily, the performance of the physical layer is specified in this document. ECU environmental and other requirements, when provided in the com

27、ponent technical specification, shall supersede the requirements of this document. The intended audience includes, but is not limited to, ECU suppliers, LIN controller suppliers, LIN transceiver suppliers, component release engineers and vehicle system engineers. SAE J2602-2 Revised NOV2012 Page 4 o

28、f 66 1.1 Mission/Theme This serial data link network is intended for use in applications 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 (ASICs) which use the network

29、. 1.2 Overview LIN is a single wire, low cost, Class A communication protocol. LIN is a master-slave protocol, and utilizes the basic functionality of most Universal Asynchronous Receiver Transmitter (UART) or Serial Communication Interface (SCI) devices as the protocol controllers in both Master an

30、d Slave devices. To meet the target of “Lower cost than either an OEM proprietary communications link or Controller Area Network (CAN) link” for low speed data transfer requirements, a single wire transmission media based on the ISO 9141 specification was chosen. The protocol is implemented around a

31、 UART/SCI capability set, because the silicon footprint is small (lower cost). Many small microprocessors are equipped with either a UART or SCI interface (lower cost), and the software interface to these devices is relatively simple to implement (lower software cost). Finally, the relatively simpli

32、stic nature of the protocol controller (UART/SCI) and the nature of state-based operation, enable the creation of Application Specific Integrated Circuits (ASICs) to perform as input sensor gathering and actuator output controlling devices, in the vein of Mechatronics. All message traffic on the bus

33、 is initiated by the Master device. Slave devices receive commands and respond to requests from the Master. Since the Master initiates all bus traffic, it follows that the Slaves cannot communicate unless requested by the Master. However, Slave devices can generate a bus wakeup, if their inherent fu

34、nctionality requires this feature. The “LIN Consortium” developed the set of LIN specifications. The Consortium is a group of automotive OEMs, semiconductor manufacturers, and communication software and tool developers. The LIN specification set is “released” by the LIN Steering Committee, a closed

35、subset of the members. Associate Consortium members contribute to the formation of the specifications through participation in LIN Work Groups; however, the direction of the Work Groups and the final released content of the specifications is the responsibility of the LIN Steering Committee. The LIN

36、Conformance Test Specification contains tests for the Physical Layer, Data Link Layer, Node Configuration and Network Management, and EMC. 1.3 Relationship to the LIN Conformance Test Specification This document includes all required tests for a J2602-1 node. This document no longer references the L

37、IN Conformance Test Specification Package, version 1.0 dated August 1, 2004. SAE J2602-2 Revised NOV2012 Page 5 of 66 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SA

38、E publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1213-1 Glossary of Vehicle Networks for Multiplexing and Data Communicati

39、ons SAE J1930 Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and AcronymsEquivalent to ISO/TR 15031-2 SAE J2602-1 LIN Network for Vehicle Applications SAE J2602-3 File Structures for a Node Capability File (NCF) 2.1.2 ISO Documents Available from American National Standa

40、rds Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 9141 Road vehicles - Diagnostic systems - Requirements for interchange of digital information 2.1.3 Supplier Publications See Appendix A for list of supplier documents/devices. 2.1.4 Other Publications

41、LIN Specification Package version 2.0 dated September 23, 2003 available at www.lin-subbus.org ES-XW7T-1A278-AC - Ford Component and Subsystem Electromagnetic Compatibility Worldwide Requirements and Test Procedures available at . This document shall be referred to as the Ford EMC Spec. 3. DEFINITIO

42、N OF TERMS 3.1 Glossary 3.1.1 Aging Factor of the Clock This is provided by the supplier of the clock device (crystal, ceramic resonator, etc.) and is the portion of the maximum total clock tolerance over the device lifetime due to aging (time). SAE J2602-2 Revised NOV2012 Page 6 of 66 4. ACRONYMS,

43、ABBREVIATIONS, AND SYMBOLS API Application Program Interface ASIC Application Specific Integrated Circuit CAN Controller Area Network CTS Component Technical Specification DLC Diagnostic Link Connector DNN Device Node Number DUT Device Under Test ECU Electronic Control Unit EMC Electromagnetic Compa

44、tibility ESD Electrostatic Discharge ISO International Organization for Standardization Kbits/s Thousands of data bits per s LDF LIN Description File LIN Local Interconnect Network LSB Least Significant Byte Lsb Least significant bit MSB Most Significant Byte Msb Most significant bit NAD Node Addres

45、s for Diagnostics NCF Node Capability File OEM Original Equipment Manufacturer RE Radiated Emissions RI Radiated Immunity SCI Serial Communication Interface UART Universal Asynchronous Receiver/Transmitter 5. LIN SYSTEM REQUIREMENTS General Test Assumptions 1 All slave devices shall have at least on

46、e request message to which they respond. 2 The Cload and Rload values specified shall include the characteristics of the test tool, so that this is the entire load external to the DUT. 3 All slave devices are assumed to contain 220 pF nominal capacitance and 30 K nominal resistance. 4 All Master dev

47、ices are assumed to contain 680 pF nominal capacitance and 1K nominal resistance. 5 The power supply voltage shall be 12 V unless otherwise specified. 6 The ambient temperature shall be between 20 and 28 C (68 and 82.4 F). 7 The length of each wire segment shall be between 0.5 and 2 m in length unle

48、ss otherwise specified. 8 Each wire segment shall consist of 20 or 22 gauge copper wire. 9 The value of all external load resistors shall be within 0.1% of the specified resistance value. 10 The value of all external load capacitors shall be within 1.0% of the specified capacitance value. SAE J2602-

49、2 Revised NOV2012 Page 7 of 66 5.1 LIN Specification Package This section is informative in nature and does not require any tests. 5.2 J2602-1 Serial Data Link Characteristics This section is informative in nature and does not require any tests. 5.3 Detection of Errors by Master (reference 4.1, LIN 2.0 Protocol Specification) This test verifies that the Master DUT stops transmitting the header when the Synch symbol is not $5