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GB/T 43940-2024 English PDF

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GB/T 43940-2024: 4 Mb/s digital time division command/response multiplex-data bus test plan
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 43940-20241319 Add to Cart 8 days 4 Mb/s digital time division command/response multiplex-data bus test plan Valid

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Basic data

Standard ID: GB/T 43940-2024 (GB/T43940-2024)
Description (Translated English): 4 Mb/s digital time division command/response multiplex-data bus test plan
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L55
Classification of International Standard: 31.200
Word Count Estimation: 66,673
Date of Issue: 2024-04-25
Date of Implementation: 2024-08-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 43940-2024: 4 Mb/s digital time division command/response multiplex-data bus test plan

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 31:200 CCSL55 National Standards of People's Republic of China 4Mb/s digital time-division command/response type Multiplexed data bus test method Multiplex-DataBusTestPlan Released on 2024-04-25 2024-08-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Abbreviations 2 5 General requirements 3 5:1 General 3 5:2 Monitoring requirements 3 5:3 4Mb/s digital time-division command/response multiplexed data bus operation requirements 3 5:4 Hardware Feature Requirements 4 5:5 Transformer Coupling Method 4 5:6 Connector Polarity 6 5:7 Characteristic impedance 6 5:8 Stub Coupling 6 5:9 Power on/off noise 6 6 Electrical performance test 7 6:1 RT electrical performance test 7 6:2 BC terminal electrical performance test 13 6:3 BM end electrical performance test 13 7 Protocol Features and Terminal Operations 13 7:1 Protocol Features 13 7:2 Terminal Operation 23 8 RT protocol test 25 8:1 Test requirements 25 8:2 RT Operation 25 8:3 Selective RT Operations 34 9 BC end protocol test 41 9:1 Test requirements 41 9:2 BC side operation 41 9:3 BC side selection operation 49 10 BM end protocol test 53 10:1 Test requirements 53 10:2 Responsive UUT Operation 53 10:3 Optional BM Replacement Message Operation 59 10:4 Responsive BM Operations 59

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting: Please note that some of the contents of this document may involve patents: The issuing organization of this document does not assume the responsibility for identifying patents: This document was proposed and coordinated by the National Technical Committee for Standardization of Aerospace Technology and Its Applications (SAC/TC425): This document was drafted by: Beijing Institute of Microelectronics Technology, China Academy of Space Electronics Technology, China Academy of Launch Vehicle Technology, Xi'an Aeronautical Computing Technology Research Institute of China Aviation Industry Corporation and Shenzhen Fengrunda Technology Co:, Ltd: The main drafters of this document are: Yao Yongchang, Chen Lei, Wang Yong, Zhang Wei, Quan Haiyang, Xiong Kaili, Li Yongfeng, Zhang Qirong, Wang Keliang, Zhu Xiangdong, Zhao Kang, Zhou Hao, Niu Shiqi, Yao Tingwei, Ji Sharu, Wang Shikui, Feng Wei: 4Mb/s digital time-division command/response type Multiplexed data bus test method

1 Scope

This document describes the electrical performance test and protocol test of a 4Mb/s digital time-division command/response multiplexed data bus: Test Methods: This document applies to devices, boards, equipment, subsystems or System testing:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document: For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document: GB/T 14241-1993 Information processing system bus interface (Eurobus A) GB/T 18759:3-2009 Open numerical control system for mechanical electrical equipment Part 3: Bus interface and communication protocol

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 Dynamic Bus Control dynamicbuscontrol An operation that grants control of the bus system to a specified terminal: 3:2 multiplexdatabus A system consisting of a data bus and related terminals and capable of performing multiplex transmission operations: 3:3 An operation to determine whether there is any message transmission on the bus: 3:4 Redundant data bus redundantdatabus Use more than one data bus and provide more than one data transfer path between subsystems: 3:5 After receiving the broadcast instruction, the RT sets the corresponding status word position to "1", indicating that the valid instruction word received by this RT is a broadcast instruction word: 3:6 Dynamic bus reception dynamicbusacceptance The response status:
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