ISO 20794-5-2020 PDF
Name in English:
St ISO 20794-5-2020
Name in Russian:
Ст ISO 20794-5-2020
Original standard ISO 20794-5-2020 in PDF full version. Additional info + preview on request
Full title and description
Road vehicles — Clock extension peripheral interface (CXPI) — Part 5: Application layer conformance test plan. This International Standard defines a conformance test plan for implementations of the CXPI application layer, specifying test objectives and test cases to verify correct application-layer behaviour and interoperability in CXPI-based vehicle sub-networks.
Abstract
This document specifies the conformance test plan for ISO 20794-2:2020 (the CXPI application layer). It defines conformance test cases and procedures covering concept of operation, network management, transfer management and error management for the application layer, and supplies requirements for test setup, execution and verdict criteria.
General information
- Status: Published (International Standard; under systematic review in ISO records).
- Publication date: 2020-10 (first edition, 2020).
- Publisher: International Organization for Standardization (ISO); prepared by ISO/TC 22/SC 31.
- ICS / categories: 43.040.15 (Car informatics / on-board computer systems).
- Edition / version: Edition 1 (2020).
- Number of pages: 51 (ISO bibliographic listing; some national/adopted copies show differing pagination due to forewords/annexes).
Scope
Specifies a structured conformance test plan for the CXPI application layer (ISO 20794-2). The scope covers conformance test cases, test conditions and criteria that exercise application-layer services and behaviours — including message structure, service interface parameters, communication methods, network management functions, transfer control and application-layer error handling — to determine whether an implementation conforms to the application-layer specification.
Key topics and requirements
- Conformance test plan structure for the CXPI application layer (test objectives, test setup, IUT — Implementation Under Test — configuration, pass/fail verdicts).
- Test cases addressing concept of operation and normal/edge communication scenarios.
- Network management-related tests (node addressing, wake-up/management behaviours, timeouts and state transitions).
- Transfer management tests (message transfer, segmentation/reassembly where applicable, sequence and length handling).
- Error management and robustness tests (error detection, error reporting, recovery behaviour and relevant CRC/indicator handling).
- Alignment with other ISO 20794 parts and OSI-layer references (tests assume compliance of lower layers or reference lower-layer conformance results).
Typical use and users
Used by automotive OEMs, Tier‑1 suppliers, ECU and sensor manufacturers, test and certification laboratories, and tool vendors developing protocol analyzers and test suites. Typical activities include pre‑integration conformance testing, supplier acceptance testing, diagnostic tool validation and formal certification of CXPI application‑layer implementations.
Related standards
Part of the ISO 20794 CXPI family. Closely related documents include ISO 20794-2 (Application layer specification), ISO 20794-3 (Transport and network layer), ISO 20794-4 (Data link and physical layer), and the conformance test-plan parts ISO 20794-6 and ISO 20794-7 that address lower-layer conformance testing. These documents together define the CXPI protocol stack and its test methods.
Keywords
CXPI; Clock Extension Peripheral Interface; application layer; conformance test plan; ISO 20794-5:2020; automotive communications; protocol testing; ISO/TC 22/SC 31; network management; error management.
FAQ
Q: What is this standard?
A: ISO 20794-5:2020 is the application-layer conformance test plan for the CXPI (Clock Extension Peripheral Interface) automotive communication protocol; it specifies the test cases and procedures used to verify compliance with the ISO 20794-2 application-layer specification.
Q: What does it cover?
A: It covers conformance test objectives, test setups, individual test cases and verdict criteria for application-layer functions: concept of operation, message transfer and structure, network management, transfer management and error handling. The tests are intended to show whether an implementation meets the requirements of ISO 20794-2.
Q: Who typically uses it?
A: Automotive system integrators, ECU and sensor manufacturers, test houses, certification bodies and tool vendors use this standard to validate CXPI application-layer behaviour and interoperability before integration into vehicle networks.
Q: Is it current or superseded?
A: ISO 20794-5:2020 is published (first edition, 2020). ISO bibliographic records indicate it is under systematic review (published documents are normally reviewed on a five‑year cycle); users should check ISO or their national body for the latest status or any amendments.
Q: Is it part of a series?
A: Yes — it is part of the ISO 20794 series standardizing the CXPI protocol (parts include application, transport/network, data link/physical, and corresponding conformance test-plan parts). The series harmonizes CXPI protocol definitions and test methods across OSI layers.
Q: What are the key keywords?
A: CXPI, clock extension peripheral interface, application layer, conformance testing, ISO 20794-5, automotive networking, protocol conformance, test plan, ISO/TC 22/SC 31.