GB/T 41588.1-2022Road vehicles - Controller area network(CAN) - Part 1: Data link layer and physical signalling (English PDF)

Foreword

This document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.

This Document is Part 1 of GB/T 41588 Road Vehicles - Controller Area Network. GB/T 41588

has published the following parts.

--- Part 1.Data Link Layer and Physical Signaling;

--- Part 2.High-Speed Medium Access Unit;

--- Part 3.Low-Speed Fault-Tolerant, Medium-Dependent Interface;

--- Part 4.Time-Triggered Communication.

This Document equivalently adopts ISO 11898-1.2015 Road Vehicles - Controller Area

Network (CAN) - Part 1.Data Link Layer and Physical Signaling.

This Document made the following editorial modifications.

--- According to the requirements of GB/T 1.1, transfer the "Consistency" in Clause 2 to

Clause 12 of ISO11898-1.2015;

--- Add "ISO/IEC 8802-2" to the Normative References in Clause 2.

Please note some contents of this Document may involve patents. The issuing agency of this

Document shall not assume the responsibility to identify these patents.

This Document was proposed by Ministry of Industry and Information Technology of People's

Republic of China.

This Document shall be under the jurisdiction of National Technical Committee of Auto

Standardization (SAC/TC 114).

Drafting organizations of this Document. Zhejiang Geely Holding Group Co., Ltd.; China

Automotive Technology and Research Center Co., Ltd.; China FAW Group Co., Ltd.; Great

Wall Motor Company Limited; Huizhou Desay SV Automotive Co., Ltd.; Xingkedi Technology

(Taizhou) Co., Ltd.; FAW-Volkswagen Automotive Co., Ltd.; Dongfeng Motor Group

Company Limited; SAIC GM Wuling Automobile Company Limited; Neusoft Group (Dalian)

Co., Ltd.; Pan-Asia Technical Automotive Center Co., Ltd.; CATARC Automotive Test Center

(Tianjin) Co., Ltd.; and CATARC (Tianjin) Automotive Engineering Research Institute Co., Ltd.

Drafting staffs of this Document. Hu Zhengnan, Zhen Haichuan, Wu Yonghui, Shan Bokai, Zhu

Tong, Ji Guotian,, Li Changlong, Liu Bin, Wu Yuzhi, Shi Xiaomi, Lv Liang, Fan Zhirong, Tan

Huaqiang, Ding Jie, Sun Wang, Liu Le, Han Guangsheng, Tan Tingyue, Che Changfa, Du

Road Vehicles - Controller Area Network (CAN)

- Part 1.Data Link Layer and Physical Signaling

1 Scope

This Document specifies the characteristics of setting up an interchange of digital information

between modules implementing the CAN data link layer. Controller area network is a serial

communication protocol, which supports distributed real-time control and multiplexing for use

within road vehicles and other control applications.

This Document specifies the Classical CAN frame format and the newly introduced CAN

Flexible Data Rate Frame format. The Classical CAN frame format allows bit rates up to 1

Mbit/s and payloads up to 8 byte per frame. The Flexible Data Rate frame format allows bit

rates higher than 1 Mbit/s and payloads longer than 8 byte per frame.

This Document describes the general architecture of CAN in terms of hierarchical layers

according to the ISO reference model for open systems interconnection (OSI) according to

ISO/IEC 7498-1.The CAN data link layer is specified according to ISO/IEC 8802-2 and

ISO/IEC 8802-3.

This Document contains detailed specifications of the following (see Figure 2).

--- logical link control sub-layer;

--- medium access control sub-layer;

--- physical coding sub-layer.

There are three implementation options. They are the following.

--- support of the Classical CAN frame format only, not tolerating the Flexible Data Rate

frame format;

--- support of the Classical CAN frame format and tolerating the Flexible Data Rate frame

format;

--- support of the Classical CAN frame format and the Flexible Data Rate frame format.

The last option is recommended to be implemented for new designs.

NOTE. Implementations of the first option can communicate with implementations of the third option

only as long as the Flexible Data Rate frame format is not used; otherwise, Error Frames are generated.

There are opportunities to run implementations of the first option also in CAN networks using the

Flexible Data Rate frame format, but these are not in the scope of this Document.

2 Normative References

The provisions in following documents become the essential provisions of this Document

through reference in this Document. For the dated documents, only the versions with the dates

indicated are applicable to this Document; for the undated documents, only the latest version

(including all the amendments) is applicable to this Document.

ISO/IEC 7498-1 Information Technology - Open Systems Interconnection - Basic

Reference Model. The Basic Model

NOTE. GB/T 9387.1-1998 Information Technology - Open Systems Interconnection - Basic

Reference Model - Part 1.The Basic Model (ISO/IEC 7498-1.1994, IDT)

ISO/IEC 8802-2 Information Technology - Telecommunications and Information

Exchange between Systems - Local and Metropolitan Area Networks - Specific

Requirements - Part 2.Logical Link Control

NOTE. GB/T 15629.2-2008 Information Technology - Telecommunications and Information

Exchange between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part

2 Logical Link Control (ISO/IEC 8802-2.1998, IDT)

ISO/IEC 8802-3 Information Technology - Telecommunications and Information

Exchange between Systems - Local and Metropolitan Area Networks - Specific

Requirements - Part 3.Standard for Ethernet

NOTE. GB/T 15629.3-2014 Information Technology - Telecommunications and Information

Exchange between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part

3 Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and

Physical Layer (ISO/IEC 8802-3.2000, MOD)

3 Terms and Definitions

For the purposes of this Document, the following terms and definitions apply.