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Altera_Forum
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9 years ago

PC doesn't boot when RXM_BAR4 connects ext DDR3 cntrlr in AVMM DMA PCIe Qsys design

Hi, I am stumped with this one. I have modified the Altera stratix V PCIe AVMM DMA reference design to include a UniPhy based external DDR3 controller to the Qsys. The target fpga is sitting ...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Thank you DSL. That may explain it. But I'm still confused why by connecting RXM_Bar4 to the external DDR3 controller the PC doesn't boot. I see that the PCIe doesn't link train in this case as the link leds on the board do not come up. Whereas if I increase the range of the card memory, the pc doesn't boot, but the link leds indicate that the card did link train and enter L0 state.

Best regards,

Sanjay