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KMich2's avatar
KMich2
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6 years ago

How do I select which hard memory controller to use if my FPGA has two controllers?

I am using an Arria V GX which is suppose to have 2 hard memory controllers. How do I select which one to activate as the UNIPHY memory controller seems to only work with bank 7 but my memory device ...
NurAida_A_Intel's avatar
NurAida_A_Intel
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hi KMich2,

As per you said the device have 2 hard memory controllers (HMC), so I assume you are using Arria V GX A1 or A3 Device.

By right, both Bank 4 and 7 is usable for this device.

May I know what is the data width you used and what type of fitter error you seen?

Just for your reference, you may refer to this handbook (page 264) in below link to get more information on Hard Memory Controller in Arria V device.

https://www.intel.com/content/www/us/en/programmable/documentation/sam1403480004852.html#sam1403479856478

Regards,

NAli1

  • KMich2's avatar
    KMich2
    Icon for New Contributor rankNew Contributor
    6 years ago

    Hi,

    The device I am using is 5AGXMA3D6F27C6.

    The controller width is 32, the DQ bus is 16 bits.

    The error messages I am getting are as follows:

    Error (175006): Could not find path between the HPHY and destination pin

    Info (175027): Destination: pin DDR3_CSn

    Info (175015): The I/O pad DDR3_CSn is constrained to the location PIN_W13 due to: User Location Constraints (PIN_W13)

    Info (14709): The constrained I/O pad is contained within this pin

    Error (175022): The HPHY could not be placed in any location to satisfy its connectivity requirements

    Info (175021): The pin was placed in location W13

    Info (175029): 1 location affected

    Info (175029): MEMPHY_X55_Y90_N1

    I assume there must be a setting to make the device on bank 4 the master, but it's not clear what this setting should be or how to enter it, as there is no option to select the device in the UniPHY IP wizard, any advice?