CAN

CAN, that is, "Controller Area Network" one of the bus widely used in the international scene. CAN was originally designed for the automotive environment as the micro-controller communications, exchange information between the in-vehicle ECU, to form automotive electronic control network. CAN network can be articulated more than 100 nodes, the rate up to 1 Mb / s, which makes real-time control very easy. And hardware error verification also increases the anti-electromagnetic interference ability of CAN.

CAN Bus Features
1. Destructive competition based on the priority of the bus arbitration.
2. Filter can receive help address the multi-frame transmission.
3. Error with error detection and automatic re-frame the function.
4. Data transmission can be divided into data broadcasting and remote data-on-demand.

Advantages of CAN data transmission system

Data bus and other components come together to be a data transmission system, the advantages of CAN data transmission system are mainly embodied in the following areas:
1. Minimize the sensor signals to for high-speed data transmission.
2. Minimize the use of ECU and ECU pins to save the limited space of electronic control modules.
3. Network freedom, and strong expansion. If the system needs to add new features, just upgrade the software. It has a powerful advantage on complex car network.
4. Each electronic control module has real-time monitoring on connected CAN-bus, the ECU will store fault code if there is failure.
5. CAN data bus is with national standards for data exchange of electronic control modules in different vehicles.
6. Bus utilization, a longer distance data transmission (up to 10 KM), high data transfer rate (up to 1 M bit / s).
7. Save a lot of non-ferrous metals, the cost is relatively low.

LIN

LIN is Local Interconnect Network, a car bottom network agreement raised by Audi and Volvo. Its purpose is to give a cheap, reliable low-speed network, as the low-end network the common agreement in car network-level and gradually replace the current low-end bus system. This standard and the application of its corresponding development, testing and maintenance platform will reduce the development, production, use and maintenance costs of car electronic systems.

LIN characteristics:
1. Single master / more supplement structure
2. Cheap hardware based on the UART / SCI interface
3. Self-synchronization with non- oscillator from nodes
4. Latency and guarantee the correctness of signal transmission
5. Cheap single-bus architecture
6. Data transmission speed of 20 Kbit / S
7. Flexible system configuration
8. Synchronized with the broadcast send / receive mode
9. Cumulative data and calibration and error detection function
10. Fault node detection
11. Cheap single device. Cheap way to send the one-way transmission, up to a maximum of 40 m / S.

LIN and CAN comparison

In a sense, LIN is the economic CAN communications network, can be located in the CAN communications layer. In the vehicle network, LIN in a low-end, with the CAN and other Class B or C-class network, its low speed, simple structure, low prices in the car, and these networks are complementary relationship. As automotive products, including components and whole machine, the price and complexity of the very sensitive, low-end network systems in motor vehicles using the LIN will show its necessity and superiority.