Looking through the RM0440 and the datasheet on the STM32G4,
I can't find information on the maximum recommended frequency for modul
CANFD.
Or it may be the same as for microcontroller up to 170 MHz?
HSE 8mhz -> PllM /2 -> PLLx85 /R /2 ... APB1 /1 -> PCLK1 170
or /Q /2 - > 170
There are also some strange things))
Or maybe I don't understand yet.
After startup, the registers are set to default values.
For different frequencies.
44.4.3FDCAN data bit timing and prescaler register (FDCAN_DBTP)
Address offset: 0x000C
Reset value: 0x0000 0A33
..
Note:
With an FDCAN clock of 8 MHz, the reset value 0x0000 0A33 configures the FDCAN for a
fast bit rate of 500 kbit/s.
The data phase bit rate must be higher than or equal to the nominal bit rate
FDCAN nominal bit timing and prescaler register (FDCAN_NBTP)
Address offset: 0x001C
Reset value: 0x0600 0A03
Note:
With a CAN kernel clock of 48 MHz, the reset value of 0x0600 0A03 configures the FDCAN
for a bit rate of 3 Mbit/s.
