MC9S12XF512 microcontroller is a new type of automotive microcontroller, including high speed, low power consumption, high stability, low price, small size and other characteristics, with 2-way FlexRay. Practice has proved that the FlexRay communication module using MC9S12XF512 and TJA1080ATS/2 has strong peripheral expansion ability, strong anti-interference ability, small size, and has the characteristics of high performance, high reliability and stability. It is mainly composed of the minimum system module controlled by the single-chip microcomputer, the dual FlexRay bus transceiver circuit module, the clock module, the reset and BDM debugging interface circuit module, the power supply module and the independent bus interface circuit module.