SLLA521B January   2022  – June 2022 TCAN1145-Q1 , TCAN1146-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction – Partial Networking
  4. 2Partial Networking Application
    1. 2.1 Modes of Operation and Partial Networking
    2. 2.2 Sleep Mode and Partial Networking
    3. 2.3 Wake-Up Frame
    4. 2.4 Classical High-speed CAN, CAN FD, and PN
    5. 2.5 Mixed Network Information
  5. 3CAN Frames and Wake-up Frames
    1. 3.1 CAN Frame Structure
    2. 3.2 Wake-up Frames
      1. 3.2.1 ID Field Match
      2. 3.2.2 Data Length Code (DLC) Match
      3. 3.2.3 Data Match
      4. 3.2.4 CRC Match
      5. 3.2.5 Acknowledge Match
    3. 3.3 Error Counter
    4. 3.4 Selective Wake FD Passive
  6. 4Selective Wake Registers
  7. 5Configuring Partial Networking
    1. 5.1 Valid CAN Message ID Example
    2. 5.2 Valid Data Example
  8. 6Summary
  9. 7References
  10. 8Revision History

3.4 Selective Wake FD Passive

The TCAN114x-Q1 can be configured to either ignore CAN-FD frames (no change to the error counter) by setting SW_FD_PASSIVE=1 to enable FD Passive mode, or treat them as error frames (increment the error counter) by setting SW_FD_PASSIVE=0. Most applications will prefer to ignore CAN-FD frames and use the FD Passive feature. As the CAN-FD frame format is different than a Classical CAN frame format following the FDF bit, the internal frame decoder will ignore the remaining part of the CAN-FD frame by waiting for the next Bus Idle, indicated by a run of six recessive (1) bits.