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How to use full 32-bit data bus?

Sebastian Sabogal
Prodigy 10 points
Other Parts Discussed in Thread: TMS320F28335

This question can easily be answered if someone can point to me to the documentation and page number, I am probably not finding the right document.

I currently use the TMS320F28335 device. I believe this device operates with a 16-bit data bus by default, but would like to change this to 32-bit mode (if not already) for speed purposes for external devices.

Thanks,

  • 0
    Guru 192875 points

    Hi,

    Check this doc out, you'll get the setting required for enabling the 32-bit mode:

    5460.XINTF.pdf

    Note:

    The F2833x XINTF can be configured for 16-bit or 32-bit wide data bus.  But that doesn't change the address space.  The C28x address space is in 16-bit words.  For example, address 0x10_0000 is a 16-bit word.  Address 0x10_0000 is the next 16-bit word.  If you did a 32-bit read of address 0x10_0000, you would read the 16-bits from address 0x10_0000 and the 16-bits at address 0x10_0001.

    Regards,

    Gautam