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Altera_Forum
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14 years ago

DDR2 HPCII v11.0 problem, thanks for help !

everything seems well, however, local_init_done is always low, what's wrong? I tried both the full calibration and "skip the calibration", it doesn't change anything, the local_init_done is alway...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Yes I can see activity on DQ/DQS at the startup on oscilloscope, so it does do something.. but fails (local_init_done does not go high)

Yes length matching was done as per DDR2 requirements (~3.5"). Clocks are routed differentially

Could it be reset? I am just trying double registering asynchronous.

Can you please look at attached schematics.

-- I used phy_clk (125Mhz) as my application clock to read/write from ALTMEMPHY. Is this OK?