Abstract: Based on Local Interconnect Network (LIN) car bus techn ology, in DP-51H MCU data communications integration imitation experiment instr ument, provided a network soft and hardware debugging and emulation condition to implement LIN-bus communications, taked into account car performances of work in special condition, development of a car light control system based on LIN-bu s, according to LIN protocol, designed and developed intelligence master and sla ve node. We completed hardware component selection and designed of master circui t. Software analysis and procedure realization. In the design of the light syste m, the communication of LIN bus is according to the norm of LIN1.2 completely. T he LIN interface is based on the standard UART/SCI. It adopt to the single line standard of ISO9141, the LIN network consists of single master node and multiple slave node concept, provided the convenient user API.

Key words: car light control system, LIN-bus, transceiver TJA1020