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JWils26's avatar
JWils26
Icon for New Contributor rankNew Contributor
7 years ago

Why does the auto precharge input signal disappear in Qsys for the DDR3 memory controller IP block when Hard Memory Interface is enabled?

The enable Auto-Precharge Control option remains selected, but if you change between not using the Hard interface to using it, the signal is no longer present in Qsys. This is targeting a Cyclone V SoC, IP is the DDR3 SDRAM Controller with UniPHY Intel PFGA IP.

1 Reply

  • NurAida_A_Intel's avatar
    NurAida_A_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    7 years ago

    Hi JWils26,

    Unfortunately hard memory controller doesn't support auto-precharge control and won't enable "local_autopch_req" as shown in attachment.

    You can consider to use regular soft memory controller that support auto-precharge control (uncheck hard memory interface) option in DDR3 UNIPHY IP.

    I am really sorry for any inconvenience cause.

    Thanks

    Regards,

    NAli1