This reference design showcases controller area network: flexible data-rate communication (CAN FD) on Hercules™ TMS570 microcontrollers using the TCAN4550 CAN FD controller. The interface between the TMS570 and the TCAN parts is done through a serial peripheral interface (SPI). This example can be used to implement CAN FD communication on any Hercules™ microcontroller that does not natively support CAN FD.