Road vehicles. Interchange of digital information on electrical connections between towing and towed vehicles. Physical and data-link layers
43.040.15 - Car informatics. On board computer systems
This document describes the data link layer (DLL) and physical
layer (PHY) for the two CAN-based network interfaces specified in
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
PMA protocol entity requirements; and
PMA device interface requirements.
The physical medium dependent (PMD) sub-clauses are composed
PMD entity requirements;
PMD device interface requirements; and
PMD network system requirements.
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