• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 82 subscribers
  • Views 1037 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS320F28379D: EMIF1 add SDRAM question

Walsh
Intellectual 950 points

Part Number: TMS320F28379D

Hi,

We used TMS320F28379D in the project. Now EMIF1 of TMS320F28379D have been used to exchange data with FPGA.

Can i add a SDRAM with EMIF1 yet?  Does this effect exchange data between EMIF1 and FPGA?

If any problem, please help to advise.

If no problem, could you help to provide hardware schematic and read and write time sequence for us reference?

Many thanks.

Walsh

  • 0
    TI__Guru 62975 points

    Walsh,

    I assume that you are using one of CS2/3/4 of EMIF1 to communicate with the FPGA.  If so, you can connect an SDRAM to CS0 in parallel for shared operation. 

    [edit] An example of this is in the TRM:

    Some issues that may arise are:

    1. Performance may be degraded when concurrent operations are requested on both memories -- the EMIF will need to process them serially
    2. Some EMIF1 SDRAM signals are multiplexed with address signals so you may lose some address range on the async interface

    The EMIF timing diagrams are in the datasheet.

    -Tommy

  • 0 in reply to tlee
    Intellectual 950 points
    Dear Tommy:

    Thanks, understand.

    Walsh