SPRUJ53 April 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
Each CAN-FD module has 4KB of message RAM embedded locally and exclusively accessible by the CAN-FD module.
In systems that use one or both CAN-FD modules, there is the ability to re-assign the RAM to the CPU memory domain in data space only. The MCANRAMACC register in the CPU_SYS_REGs registers provides control of each CAN-FD instance RAM assignment individually. Once set, the CAN-FD module has no access to these RAMs. If the CAN-FD module is used at all in the system, the CAN-FD module is not recommended to allocate to the CPU.