SLLA383A February 2018 – August 2022 SN65HVDA100-Q1 , SN65HVDA195-Q1 , TLIN1022-Q1 , TLIN1029-Q1 , TLIN2022-Q1 , TLIN2029-Q1 , TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SJ-Q1
The SCI is the dominant interface used between LIN transceivers and the microcontrollers that communicate with them. Originally UART was used, but fault-free interface through UART is known to be difficult to achieve.
The microcontroller transmits bit frames, starting with the dominant start bit. This synchronizes all receivers on the bus, followed by the least significant bit to most significant bit, then a stop bit. This constitutes one SCI frame, and a LIN message is composed of multiple SCI frames.