38.2 Modes of Operation

The CAN FD Protocol Module has eight modes of operation:

  • Configuration mode
  • Normal CAN FD mode: Supports mixing of CAN FD and CAN 2.0 messages.
  • Normal CAN 2.0 mode: Will generate error frames when receiving CAN FD messages. The FDF bit is forced to zero and only CAN 2.0 frames are sent, even if the FDF bit is set in the transmit message object.
  • Disable mode
  • Listen Only mode
  • Restricted Operation mode
  • Internal Loopback mode
  • External Loopback mode

The modes of operations can be grouped into four main groups: Configuration, Normal, Sleep and Debug (see Figure 38-2).