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Altera_Forum
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10 years ago

MegaWizard ram not working with Memory content editor

I am using Quartus 13.0 with Altera DE2 development board. I generated a 1-port RAM in MegaWizard, and enabled the "In-system Memory Content Editor". The compiler gives the error message:

"Error (15684): M4K memory block WYSIWYG primitive "XYZ:XYZ|altsyncram:altsyncr am_component|altsyncram_asc1:auto_generated|altsyn cram_t682:altsyncram1|ram_block3a1" utilizes the dual-port dual-clock mode. However, this mode is not supported in Cyclone II device family in this version of Quartus II software. Please refer to the Cyclone II FPGA Family Errata Sheet for more information on this feature."

The error is gone when I disable the Memory Content Editor.

We tried another project, (same platform) , which had a MegaWizard ram and it works fine. So I doubt the part of the message "is not supported in Cyclone II device family in this version of Quartus II software".

I couldn't figure out what setting(s)/option(s) I need to change. They both seem to have similar setup.

Can someone help on figuring this out? http://www.alteraforum.com/forum//images/icons/icon11.png

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Hi Linda_4,

    In the 2nd project, is it that same CII device is used and if you use the same method to generate the 1-port RAM, there is no error when enabled "In-system Memory Content Editor"?
  • Altera_Forum's avatar
    Altera_Forum
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    10 years ago

    @tiny007: Yes. the exact same platform is used (same SW, HW, method to generate RAM)

    @nic_@ : I ran into that document earlier. I am using version 13.0. It compiles other projects with RAM perfectly.

    The problem is repeatable in the sense that both projects behave the same way on a colleague's computer with an older Quartus II (12.0). It seems it's some kind of setting an option here or there. :/