在芯片DataSheet的首页描述内容是： Supports CAN FD data rates up to 8 Mbps with up to 18 MHz SPI clock speed
但是在芯片DataSheet的第20页（8.1 Overview）的描述内容是： The TCAN4551-Q1 is a CAN FD controller with an integrated CAN FD transceiver supporting data rates up to 8 Mbps. The CAN FD controller meets the specifications of the ISO 11898-1:2015 high speed Controller Area Network (CAN) data link layer and meets the physical layer requirements of the ISO 11898-2:2016 High Speed Controller Area Network (CAN) specification providing an interface between the CAN bus and the CAN protocol controller supporting both classical CAN and CAN FD up to 5 megabits per second (Mbps).
