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

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

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1   Scope

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.