CRC field

CRC field

The CRC field contains the CRC sequence followed by a recessive CRC delimiter. In CAN FD frames, the CRC field also contains the stuff count. The 15-bit CRC sequence is used for Classical CAN. The 17-bit and 21-bit CRC sequences are respectively used for CAN FD frames with up to 16-byte or longer than 16-byte data field. The hamming distance is specified as 6. The CRC sequence is able to detect 5 randomly distributed bit failures or a burst failure of up to 15 bit in SOF, arbitration, control, and data fields.