The two provided CAN-FD capable buses are identical, with the exception that CAN0 supports sleep mode and CAN1 does not. Sleep mode is connected such that when the VEK280 is a device, it can be put to sleep through CAN functions provided for in the transceiver. For more information, see the TI TCAN1043A datasheet and the VEK280 schematic page 41.
Buses are connected from the VE2802 through LPD_MIO pins. LPD_MIO[14:15], PMC_MIO[37:38] make up CAN0 and LPD_MIO[16:17] makes up CAN1. CAN0 has additional pins allocated to enable sleep mode.
CAN0 connects to a TI TCAN1043A CAN FD transceiver (U372). The output bus connects to screw terminal J392 for easy prototyping. Separate 60.4Ω resistors can be added to CAN0_CANL and CAN0_CANH using J395 and J396, respectively. CAN0 also has the INH output from U372 connected back to the VE2802 (U1) to aid in sleep mode control. See the VEK280 schematic pages 11 and 41 for details.
CAN1 connects to a TI TCAN1043A CAN FD transceiver (U373). The output bus connects to screw terminal J393 for easy prototyping. Separate 60.4Ω resistors can be added to CAN1_CANL and CAN1_CANH using J398 and J397, respectively. See the VEK280 schematic pages 11 and 41 for details.