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  • ISO
    ISO 20794-4:2020 Road vehicles - Clock extension peripheral interface (CXPI) - Part 4: Data link layer and physical layer
    Edition: 2020
    $572.69
    / user per year

Content Description

This document specifies the CXPI data link layer and the CXPI physical layer.

The DLL is based on:

— priority-based CXPI network access;

— non-destructive content-based arbitration;

— broadcast frame transfer and acceptance filtering; and

— node related error detection and error signalling.

The CXPI physical layer (PHY) requirements comprise of:

— physical signalling (PS) sub-layer, which specifies the requirements of the clock generation function, the encoding and decoding of CXPI frames, and bit-wise collision resolution logic;

— physical media attachment (PMA) sub-layer, which specifies the requirements of the signal shaping waveform logic;

— physical media dependent (PMD) sub-layer, which specifies the requirements of the CXPI network termination, electrostatic discharge protection, etc., and device connector requirements; and

— physical media (PM), which specifies the requirements of the CXPI network cable/wiring harness.



About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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