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TMS320F28035: Need to add external memory 16 bit address 16 bit word.

Michael Gambuzza
Prodigy 100 points

Part Number: TMS320F28035
Other Parts Discussed in Thread: C2000WARE

Hello,

I have a design now that uses the TMS320F28035 but my client wants to add memory to the design but maintain most of the existing code compatibility. I don't know if this is possible with this part or I need to migrate to a different one.  Any suggestions would be helpful.

Thanks

  • 0
    TI__Guru** 117431 points
    Hi Michael,

    F28035 device does have external memory interface hence you can not connect external memory device. You can refer F28335 device which has external interface to see if that meets your requirement.

    Regards,

    Vivek Singh
  • 0 in reply to Vivek Singh
    Prodigy 100 points
    Vivek, thanks for the reply. Is there an example document you can point me to that shows an example? I guess I'm having trouble identifying where the Address and data lines exit.
  • 0 in reply to Michael Gambuzza
    TI__Guru 62975 points

    Michael,

    The F28335 XINTF Reference Manual includes signal descriptions.  Software examples are in C2000Ware: \C2000Ware_XXXX\device_support\f2833x\examples\xintf_run_from

    Can you elaborate on how much memory you need to add and how it will be used?  For example, is the memory for storing program instructions or just data?  What are the throughput requirements?

    If the memory is only used for low-throughput data storage, you could use a SPI-based memory.

    If the needed memory size is not too big, you can upgrade to F2806x with more embedded Flash and RAM.  The F2803x feature set is more compatible with F2806x than F2833x.

    You can also consider the newer F28004x device for improved capabilities and even more memory than F2806x, but this would require additional migration effort.

    -Tommy

  • 0 in reply to tlee
    Prodigy 100 points
    Tommy: In hindsight I think I can use a serial RAM on the SPI. It's a 256KB requirement so I think I can stay with the existing part. Thanks for the response.