We are currently setting up a project using STM32H743 and need to implement CAN / CAN-FD. When activating FDCAN1 or 2 in Cube as Mode "FD", two additional checkboxes can be activated: Enable_FDCAN_TXFD and Enable_FDCAN_RXFD. When activating these, two additional RX/TX Pins are activated on the chip. What is the purpose of these Pins? Do we need to enable them to have CAN-FD work properly? I could not find any declaration of this.
Thank you for any help.