International Standard
ISO 20794-4:2020
Road vehicles — Clock extension peripheral interface (CXPI) — Part 4: Data link layer and physical layer
Reference number
ISO 20794-4:2020
Edition 1
2020-02
International Standard
Read sample
ISO 20794-4:2020
72870
Published (Edition 1, 2020)

ISO 20794-4:2020

ISO 20794-4:2020
72870
Language
Format
CHF 194
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Abstract

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.

General information

  •  : Published
     : 2020-02
    : International Standard published [60.60]
  •  : 1
     : 56
  • ISO/TC 22/SC 31
    43.040.15 
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