Standard format

  • SOF - Start of Frame,:1 bit
  • Message ID: 11 bit
    • bit 11 and 4 ard masked. 11 - 2 = 9 bit remaining
    • 2^9 = 512 different CAN frames in a single can network
  • RTR - Remote Transmit Request: 1 bit
    • 1: Remote frame
    • 0: Data frame
  • Reserved bit: R1 and R0, 2 bits total
  • DLC - Data Length Code: 4 bit
  • Data: 0 to 8 bytes
  • Checksum: 15 bit
  • CD - checksum delimiter: 1bit
  • ACK: 1 bit
  • AD - Ack delimiter: 1 bit
  • EOF - End of Frame: 7 bits
  • IFS - Interframe Space

Extended format