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Altera_Forum's avatar
Altera_Forum
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12 years ago

can I turn off the auto-refresh in the DDR2 controller with ALTMENPHY

Hi all,

I am working on a video frame buffer which is using the cyclone 4E FPGA and the altera megafunction DDR2 SDRAM controller with ALTMENPHY.

I am dealing with the streaming video data, thus I don't need the auto-refresh function in the DDR2 controller. is it possible to turn it off so that I may save some bandwidth?

Thanks

Daniel

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    Did you read the user manual? I think you'll set USER_REFRESH_EN to true and never request a refresh.

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    --- Quote Start ---

    Did you read the user manual? I think you'll set USER_REFRESH_EN to true and never request a refresh.

    --- Quote End ---

    yes I have tryed that. but it makes no difference.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    It may be the case that parameter isn't passed to the hp_controller instance. May be you need to edit the wrapper instance generics manually.