PCB, PCB home automotive electronics is developing towards the direction of networking and intelligence, electronic control device will provide stable, reliable and low-cost network connection through CAN bus; Motors, switches, sensors, and headlights are networked via the local interconnection network (LIN).
Freescale solutions include: CAN/LIN bus door control scheme, headlight control scheme and CAN/LIN network solution based on 8-bit 908MCU; The 9S12C3216 LIN master controller controls steering wheel, light switch, air conditioning fan control (LINSlaveHVACBlower), air conditioning damper (LINSlaveHVACDamperDoor) and instrumentation (LINSlaveCluster).
Automotive network technology
Automakers and tier 1 suppliers face increasingly complex problems of harmonizing safety, powertrain, chassis and body systems. Emerging systems such as wire control, collision avoidance, and assisted driving all require a network that provides extremely high data rates in a predictable and reliable manner. MOST can support high data rates, however, the network standard is designed specifically for in-car multimedia connections. The CAN network CAN connect several ecus and the typical data rate is only 125k~lMbps.
In addition, CAN also USES priority mediation for message transmission, which means that low-priority messages are always transmitted after high-priority messages, and only the highest-priority messages CAN be guaranteed to be transmitted. The relatively low data rate and lack of fault tolerance make CAN unable to adapt to more advanced applications (such as wire control system), while LIN is essentially a cheap and relatively slow sub-network to connect CAN, which cannot reach the data rate required for the advanced security system used in the next generation of vehicles.