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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?