The DCB500 is a modem transceiver for multi-point multiplex communication network over noisy DC power-line. The device has a flexible Asynchronous (UART) and Synchronous (SPI) interfaces with host controllers commonly used in the automotive environment.
Messages from Electronic Control Unit (ECU) are stored in the internal transmit FIFO. The data is then coded by a strong error correction code especially designed to meet the power-line typical channel burst noises, and is modulated by a differential QPSK modulator that drives the noisy line (through a passive filter).
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The DC-BUS system consists of up to 16 modem devices (nodes). It provides services required to implement communication bus network. The DC-BUS multiplex network operate as a CSMA channel dedicated for data, control and even voice communication over noisy DC power-line. Main characteristics are:
Channels: 4 selectable channels
Data transfer rate: 500 Kbps.
Number of nodes: Up to 16 nodes per channel
The DCB500 device implements the power-line communication physical layer and part of the link layer (Modem, Channel coder, basic protocol). The transceiver has built-in CSMA mechanism for multiplex network operation. The DCB500 operates over a pre selected channel. Its SPI synchronous and Asynchronous UART interfaces enable transfer of unlimited length of data over DC power-line reducing dramatically the overhead associated with other protocols. It specially applicable for transfer of large files such as voice, MP3 music and compressed video.
Connection between multiple Electronic Control Units (ECU) in a car
An alternative and redundant communication channel for safety critical communication networks
Fast ECU remote programming
Music, video and voice transfer
High-speed sensor monitoring
New in-vehicles electronic systems require comprehensive communication capabilities. The DCB500 modem offers a unique communication solution for modules installed in locations having only a single DC power-line without the need of additional wires. This solution provides a reliable universal digital communication channel that withstands the noises on battery power-line, saving (i.e.) CAN / LIN transceiver(s) and cables.
