What is ISO 20794‑7 about?
ISO 20794‑7 is part seven of the multi-series standard on clock extension peripheral interface (CXPI) data link and physical layer conformance test plan.
ISO 20794‑7 specifies the conformance test plans for the CXPI data link layer and the CXPI physical layer. ISO 20794‑7 also specifies the conformance test plan for error detection.
Additionally, ISO 20794‑7 describes the concept of conformance test plan operation.
Who is ISO 20794‑7 for?
ISO 20794‑7 on data link and physical layer conformance test plan is useful for:
- Road vehicle manufacturers
- Designers and developers of clock extension peripheral interface (CXPI)
- Automotive engineers
- Vehicle switches and sensors manufacturers
- Data link and physical layer designers and developers
Why should you use ISO 20794‑7?
CXPI is an automotive low-speed single wire network. It is an enabler for reducing vehicle weight and fuel consumption by reducing wire counts to simple devices like switches and sensors.
CXPI serves as and is designed for automotive control applications, for example door control group, light switch and HVAC (Heating Ventilation and Air Condition) systems.
ISO 20794‑7 covers the data link and physical layer conformance test cases (CTC) to verify the requirements described in ISO 20794-4:2020 data link layer and physical layer document.
ISO 20794‑7 provides the set-up parameters, which specify data link layer and physical layer properties of the IUT. The IUT-specific data sheet includes set-up parameters, which the test system requires to perform the CTCs.
ISO 20794‑7 gives the data link layer conformance test that evaluates the operation of the response field (L_PDU), whether those are transmitted and received in the correct order according to ISO 20794-4.
ISO 20794‑7 verifies that the clock output function of the IUT complies with the CXPI specification.
ISO 20794‑7 verifies that the detection function of the byte error complies with the CXPI specification.
