You may have two options:
- either 40MHz directly feeded by crystal oscillator
- or 80MHz clock feeded from PLL
I am recommending to use following clock configurator:
Thank you for your answer.
If FR_MCR[CLKSEL] is 1 in MPC5748, check whether other configurations are required in flexray PE clock? I have configured FS80=80MHz.
Yes, it is the configuration