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TMS320F28388D: RAM size for M4 is too small

Strong ZHANG
Expert 4670 points

Part Number: TMS320F28388D

Hi Team,

My customer want to use F28388 for servo application, they complain that the RAM size for M4 which is 96KB is too small,  for their two axis motor control, they will require at least 75KB for each axis and 150KB for total to store a lot of parameters that can be modified by their end customer. They will use C28x for motor control and M4 core for communication. So they don’t want to use RAM that are dedicated for C28x, do you have any suggestion for this issue that RAM for M4 is not enough?

  • 0
    TI__Guru** 116971 points

    Hi Zhang,

    Have customer already used the optimization on M4 to reduce the code size? Also have they partitioned the code properly so that every constant component of the code is mapped into flash and not in RAM. On M4 we have only 96KB RAM plus some additional MSG RAMs so user need to fit it and that much RAM only.

    Regards,

    Vivek Singh