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BSI BS ISO 20794-4:2020

Road vehicles. Clock extension peripheral interface (CXPI) -- Data link layer and physical layer
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BSI BS ISO 20794-4:2020

Road vehicles. Clock extension peripheral interface (CXPI) -- Data link layer and physical layer

PUBLISH DATE 2020
PAGES 70
BSI BS ISO 20794-4:2020

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.

SDO BSI: British Standards Institution
Document Number ISO 20794-4
Publication Date Feb. 13, 2020
Language en - English
Page Count 70
Revision Level
Supercedes
Committee AUE/16
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