14.6.1 Clock Configuration

The sample point of all nodes in a CAN FD network should be at the same position. Hence, it is recommended to use the same clock frequency and bit time settings for all nodes. Therefore, a CAN clock (FCAN) of 80 MHz, 40 MHz or 20 MHz is recommended.

The CLKSEL bit allows the selection of the clock source to the CAN FD module.

  • If CLKSEL = 1, CAN module operates at system clock.
  • If CLKSEL = 0, then the clock from the CAN clock generator will be selected.