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ZedBoard DDR3 interface address space?

Former Member

Hi,
According to ZedBoard user guide, The multi-protocol DDR memory controller is configured for 32-bit wide accesses to a 512 MB address space.

But I was wondering, how would I be able to target only ONE of the Micron MT41K128M16HA-15E components?

In other words, for my specific application, I have two VDMAs that are streaming to DDR. But I would prefer to know that the data from one VDMA is streamed into only one of the Micron memory components, and my data from the second VDMA targets ONLY the second memory component!!

Thanks in advance,
--Rudy


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    Will there be a way for me to verify that I performed this correctly?

    Because I am afraid if try to read back from memory with the processor (in software), I will always get a 32-bit wide data back, since the processor only communicate with SDRAM on 32-bit wide boundary, correct?

    So, could you recommend any method for verification?
    Will there be anyway to temporarily disable one of the DDRs, and when I am reading back a 32-bit wide data, I would only see that 16-bit of this data is valid, which would correspond to either (Byte-0 & Byte-1), or (Byte-2, and Byte-3) !
    Or, maybe there is an easier way to verify this, but I just cannot see it?

    Thanks,
    --Rudy

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  • 0

    Will there be a way for me to verify that I performed this correctly?

    Because I am afraid if try to read back from memory with the processor (in software), I will always get a 32-bit wide data back, since the processor only communicate with SDRAM on 32-bit wide boundary, correct?

    So, could you recommend any method for verification?
    Will there be anyway to temporarily disable one of the DDRs, and when I am reading back a 32-bit wide data, I would only see that 16-bit of this data is valid, which would correspond to either (Byte-0 & Byte-1), or (Byte-2, and Byte-3) !
    Or, maybe there is an easier way to verify this, but I just cannot see it?

    Thanks,
    --Rudy

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