The female head of the CANFD connector is connected to the OBDII-16 connector, and the male head of the CANFD connector is connected to the diagnostic socket of the vehicle.
*CAN-FD data frame newly adds EDL bit, BRS bit, ESI bit in the control field, and adopts new DLC encoding method and new CRC algorithm (CRC field is extended to 21 bits)
*According to the length of the data field, different CRCs are used, such as CRC_17 (0-16Bytes), CRC21 (17-64Bytes)
*Does not support remote frames (no RTR bit)
For the conversion of the existing CAN system, the current mainstream has the following rules for compatibility with CAN and CAN-FD:
*Use separate two hardware channels in one system
*Under the unified platform, keep the original CAN processor and improve the CAN transceiver
*When using CAN-FD communication, sleep CAN node