本文档指定了CXPI数据链路层和CXPI物理层。 DLL基于: -基于优先级的CXPI网络接入； -基于内容的非破坏性仲裁； -广播帧传输和接收过滤；和 -与节点相关的错误检测和错误信号。 CXPI物理层（PHY）要求包括: -物理信令（PS）子层，指定时钟生成功能、CXPI帧的编码和解码以及逐位冲突解决逻辑的要求； -物理媒体连接（PMA）子层，指定信号成形波形逻辑的要求； -物理介质相关（PMD）子层，指定CXPI网络终端、静电放电保护等的要求。 ，以及设备连接器要求；和 -物理介质（PM），它规定了CXPI网络电缆/线束的要求。

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.