Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 1: Physical and data-link layers (ISO 11992-1:2019)
This document describes the data link layer (DLL) and physical layer (PHY) for the two CAN-based network interfaces specified in the 11992-series.The DLL sub-clauses are composed of:— DLL protocol entity requirements — DLL device interface requirements and— DLL network system requirements.Normally, the physical signalling sub-layer is implemented in the CAN protocol controller. The physical medium attachment sub-layer is normally implemented in the CAN transceiver or the System Base Chip (SBC). Optionally, it can comprise also additional protection circuitry. The media-dependent sub-layer comprises the connectors and the cabling.The physical signalling (PS) sub-clauses are composed of:— PS entity requirements — PS device interface requirements and— PS network system requirements.The physical medium attachment (PMA) sub-clauses are composed of:— PMA protocol entity requirements and— PMA device interface requirements.The physical medium dependent (PMD) sub-clauses are composed of:— PMD entity requirements — PMD device interface requirements and— PMD network system requirements.
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