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external parallel ADC and f28346

Andrew Barnes
Intellectual 600 points

I've been using MSP430's for about 10 years and I'm just starting with the TMS series.  We have the DIM168 control card for evaluation and I want to connect up a parallel ADC.  My sample rate will be ~3MSPS so I suspect I'll be using DMA transfer with the XINTF.

As I understand it the XINTF maps into 3 memory regions on the f28346.  Does this mean that an entire region is consumed with my ADC or do I need to build in some address decoding logic to make the ADC map to one specific memory location?

Once again I'm new to this so please be gentle.

  • 0
    TI__Guru* 93800 points

    Andrew Barnes said:
    As I understand it the XINTF maps into 3 memory regions on the f28346.  Does this mean that an entire region is consumed with my ADC or do I need to build in some address decoding logic to make the ADC map to one specific memory location?

    Hi Andrew,

    Yes - you would need to use an address line to connect to different devices.  Another idea is to use a GPIO as an enable signal to turn on / off different external devices.  You would need to pull the GPIO before access and back again after the access.