SLAAET4 April   2025 MSPM0G3506 , MSPM0G3507 , MSPM0G3518 , MSPM0G3519

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 MCAN Features
  5. 2Sysconfig Configuration for MCAN Module
    1. 2.1 MCAN Clock Frequency
    2. 2.2 MCAN Basic Configuration
      1. 2.2.1 Transmitter Delay Compensation (TDC)
      2. 2.2.2 Bit Timing Parameters
      3. 2.2.3 Message RAM Configuration
        1. 2.2.3.1 Standard and Extended ID Filter Configuration
          1. 2.2.3.1.1 How to Add More Filters
        2. 2.2.3.2 TX MSG RAM
        3. 2.2.3.3 RX MSG RAM
    3. 2.3 Advanced Configuration
    4. 2.4 Retention Configuration
    5. 2.5 Interrupts
    6. 2.6 Pin Configuration and PinMux
  6. 3Demo Project Descriptions
    1. 3.1 TX Buffer Mode
    2. 3.2 TX FIFO Mode
    3. 3.3 RX Buffer Mode
    4. 3.4 RX FIFO Mode
  7. 4Debug and Design Tips to Resolve/Avoid CAN Communication Issues
    1. 4.1 Minimum Number of Nodes Required
    2. 4.2 Why a Transceiver is Needed
    3. 4.3 Bus Off Status
    4. 4.4 Using MCAN in Low Power Mode
    5. 4.5 Debug Checklist
      1. 4.5.1 Programming Issues
      2. 4.5.2 Physical Layer Issues
      3. 4.5.3 Hardware Debug Tips
  8. 5Summary
  9. 6References

1 Introduction

CAN is a serial protocol that was originally developed for automotive applications. Due to robustness and reliability, CAN is available in diverse applications such as industrial equipment, medical electronics, trains, aircraft, and so forth. CAN protocol features sophisticated error detection and confinement mechanisms and is capable of simple wiring at the physical level. The original CAN protocol standard is now referred to as classical CAN to distinguish from the more recent CAN FD standard. Figure 1-1 shows the typical wiring for CAN bus.

Typical CAN Bus Figure 1-1 Typical CAN Bus

CAN Flexible Data Rate (CAN FD) is an enhancement to the classical CAN in terms of higher bit rates and the number of bytes transferred in one frame, thus increasing the effective throughput of communication. While classical CAN supports bit rates up to 1Mbps and a payload size of 8 bytes per frame, CAN FD supports bit-rates up to 5Mbps and a payload size of up to 64 bytes per frame. Figure 1-2 shows the frame structure for CAN FD frames.

CAN FD Frame Figure 1-2 CAN FD Frame