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Patina's avatar
Patina
Icon for New Contributor rankNew Contributor
4 years ago

Cyclone 10 LP M9K Packed Mode

Hi, I am using Cyclone 10 LP. I need to use M9K memory in Packed Mode because my project requires a lot of small memory blocks for small LUT (look-up table). The size of the LUTs is 8 bits...
paveetirrasrie_Altera's avatar
paveetirrasrie_Altera
Icon for Frequent Contributor rankFrequent Contributor
4 years ago

Hi Patina,


Please give me a little time to investigate this issue, I will contact you back as soon as I find a possible solution.


Regards

Pavee


  • Patina's avatar
    Patina
    Icon for New Contributor rankNew Contributor
    4 years ago

    Hi Paveetirra,

    I appreciate your reply.

    This is my first time to open and check the Fitter RAM Summary because I have never ran out of memory in my past projects.

    For that reason, I'm afraid I don't correctly understand and interpret what the Fitter RAM Summary says.

    The error I originally got was that my design requires 317 blocks but my FPGA (10CL080YU484) has only 305 blocks.

    Please open the attached PDF file.

    I need eighteen 24 bit * 340 words memory blocks and a lot more for other (image) buffers and Nios II as well.

    If I use Double Port Mode, the message says "your design requires 317 blocks".

    After changing the structure as shown in the figure from Dual Port to Single Port, the error message disappeared and reports says JUST 305 blocks are used.

    It seems Fitter allocates the memory blocks in Packed Mode.

    But judging from what Fitter RAM Summary says, I am not sure if Packed Mode is successfully applied by Fitter.

    Especially, why "M9Ks" column is "2" and "Location" column is "M9K_X87_Y7_NO, M9K_X55_Y20_NO".

    Again, that is why I am wondering if I correctly understand and interpret the summary or not.

    Or, I am afraid what I am doing is incorrect.

    Thanks for your help.

    Patina