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Altera_Forum's avatar
Altera_Forum
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17 years ago

DDR Sdram

Hi everyone,

i want to implement a simple system with a Nios and a ddr sdram controller on a stratix ii development board. I have created it with sopc builder but when i try to compile it i always receive, during Timing Analyzer, the error

"Error: Couldn't find the clock output pins. Stop.

Error: 0 DQ pins found for variation 'ddr_sdram_0' but it was configured to be 16 bits wide.

Error: Can't find hierarchy path.

Error: The hierarchy path could not be found, possibly due to previous errors"

Can anyone help me?

Thank you!

4 Replies

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

    Search www.altera.com for "Couldn't find the clock output pins. Stop" including the quotes. You will get one search hit, which will take you to MegaCore release notes that have a suggestion for that error.

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

    I followed the suggestion found in altera document "megacore ip library, release note and errata" but i couldn't solve my problem.

    Any idea?

    I'm using Quartus 7.2