Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

DDR2 External Memory Interface

Hi,

I want to test one DDR2 memory using the example with ALTMEMPHY megafunction on cyclone IV, it compiles without errors or critical warnings, but when I use the ALTMEMPHY External Memory Interface Debug Toolkit it stops at the stage "Read resynchronisation phase calibration", anyone knows how to solve this?,

Thank you.

1 Reply

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

    I've read from the uniphy doc that calibration failure at the read stage usually involves problem with address/command clock phase and address/command board skew and delay. what numbers did you use for those parameters?