The Local Interconnect Network (LIN) is a single-wire, low-speed serial communication protocol used for automotive applications. It is designed to be a cost-effective alternative to other automotive communication protocols, such as CAN.
The LIN protocol is based on a master-slave architecture. There is one master node, which initiates all communication, and one or more slave nodes, which respond to requests from the master.
The LIN protocol supports two types of frames: header frames and response frames. Header frames are sent by the commander/master node to request data from a responder/slave node. Response frames are sent by slave nodes in response to request frames.
The LIN protocol can be used to transmit a variety of data types, including sensor data, actuator commands, and diagnostic information.
The header in total consists of at least 13 bits for the SYNC break, 1 delimiter bit, 10 SYNC field bits (1 start bit, 8 bits for synchronization, and 1 stop bit), and 10 identifier bits (1 start bit, 6 bits for the identifier, 2 bits for parity, and 1 stop bit).
The response in total consists of 10 bits for each byte of data (1 start bit, 8 bits for data, 1 stop bit), for up to 8 data bytes, and 10 bits for checksum (1 start bit, 8 bits for checksum solution, 1 stop bit).