SPRUIN7C March 2020 – March 2024 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1
The required frequency tolerance for the CAN bit clock depends on the bit timing setup and network configuration, and can be as tight as 0.1%. Since the main system clock (in the form of PERx.SYSCLK) can not be precise enough, the bit clock can also be connected to XTAL using the CLKSRCCTL2 register. There is an independent selection for each CAN module.
To provide correct operation, the frequency of the CAN bit clock must be less than or equal to the SYSCLK frequency.