
Communication Buses for SoC Architectures 65
FIGURE 2.22
In-car intelligent elements.
2.9.1 Automotive
The most widely used automotive bus architecture is the CAN bus. The CAN
(Controller Area Network) is a multimaster broadcast serial bus standard for
connecting electronic control units (ECUs). Originally developed by Robert
Bosch GmbH in 1986 for in-vehicle networks in cars. Bosch published the
CAN 2.0 specification in 1991 [13]. It currently dominates the automotive
industry, also having considerable impact in other industries where noise im-
munity and fault tolerance are more important than raw speed, such as factory
automation, building automati