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What does LIN bus mean in automobiles?

1 Answers

LeRyan

07/24/25 2:46pm

LIN bus is a low-cost serial communication network defined for automotive distributed electronic systems. Below is an introduction to LIN bus: 1. Definition: LIN bus is a low-cost serial communication network defined for automotive distributed electronic systems. It serves as a supplement to other automotive multiplex networks such as Controller Area Network (CAN) and is suitable for applications that do not require high bandwidth, performance, or fault tolerance. The LIN bus is based on the SCI (UART) data format and adopts a single-master/multi-slave mode, which is a special case of UART. 2. Working Principle of LIN Bus: The control units controlled by the LIN bus are generally distributed in a relatively close space. Data transmission is single-wire, and the maximum length of the data line can reach 40m. In the master node, a 1kΩ resistor is configured to terminate the 12V power supply, while in the slave nodes, a 30kΩ resistor is configured to terminate the 12V power supply. Each node supplies power to the bus through a resistor connected to the positive terminal of the battery, and each node can pull down the bus voltage through its internal transmitter.

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