Alcance
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.