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

2 Partial Networking Application

Figure 2-1 represents a simplified mixed CAN FD network. ECU3 and ECU6 are partial networking capable ECUs. The rest of the ECUs are not PN capable. ECU1 and ECU8 represent the termination locations. CAN bus represents the CANH and CANL signals. PN enabled ECUs described in the following sections relate to ECU3 and ECU6 in this figure.

Figure 2-1 Simplified CAN FD Network

To understand partial networking in an application the PN capable CAN transceiver needs to be understood. Modes of operation and the impact of partial networking will be presented, followed by a deeper investigation of sleep mode and how utilizing PN creates two different levels of sleep. To understand how PN works, a brief explanation on a CAN frame is provided which will be followed up with a more detailed explanation. Lastly, information will be provided on how a mixed network similar to the simplified one provided will behave.