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Sushmita's avatar
Sushmita
Icon for Occasional Contributor rankOccasional Contributor
5 years ago
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What is the maximum Avalon memory-mapped interface data width supported for MAX 10 device?

Hi, I want to use MAX 10 Fpga with NIOS II. I referred the below mentioned document. In this, it is mentioned that MAX 10 can support x16 interface ( in table 2.2 for various packages), but the maxi...
  • NurAida_A_Intel's avatar
    NurAida_A_Intel
    5 years ago

    Dear Susmita,

    Firstly, no problem for contacting us, It's what I'm here for. Even, me myself is also still learning. Learning process never ends I can say. So, don't be sorry 😊

    Interface width : The total number of DQ pins of the memory device.

    DQ/DQS group size: The number of DQ bits per DQS group.

    Let's say for example your total interface width (DQ width) is 16 bits.

    • The maximum supported DQ group size in Max 10 is 8bits.
    • So, there will be 2 group of data (DQS) which is 8 bits + 8bits =16 bits.

    To summarize based on above example:

    1. Total interface width = 16 bits
    2. DQ/DQS group size = 8 bits per DQS group
    3. Number of DQS group = 2

    Hope this helps.

    Thanks

    Regards,

    Aida

NurAida_A_Intel's avatar
NurAida_A_Intel
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi Susmita,

It’s me Aida. Hope you still remember me. Glad to serve you again. 😊

Kindly refer to my reply below.

1. How to calculate the avalon memory mapped data width for any device based on DQ group size?

[Aida]: MAX 10 supports only Half rate, which results in a width of 4× the memory data width.

2. Does Max 10 support x 16 interface?

[Aida]: Yes, but not for all Max 10 devices and packages support x16 interface. Refer to Max 10 EMIF handbook under section Table 2-2: Supported Maximum External Memory Interface Width in MAX 10 Device Packages for MAX 10 device packages support that support x16 interface.--> https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/max-10/ug_m10_emi.pdf

3. If yes, what is the maximum of DQ groups in MAX 10?

[Aida]: The maximum DQ group is x8 data.

Hope this helps. Let me know if there are any concern/questions.

Thanks

Regards,

Aida