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ISO 20794-4:2020

Road vehicles -- Clock extension peripheral interface (CXPI) -- Part 4: Data link layer and physical layer

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Kehtiv alates 05.02.2020
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05.02.2020
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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.
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