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Altera_Forum's avatar
Altera_Forum
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12 years ago

ROM at ModelSim - data port is in High-Z State

Hi all.

Im new to FPGAs.

I have built some circuit with ROM memory (added with MegaWizard).

The problem is memory output port is in the High-Z state all the time. I have connected clock to 50M clock, and address bus to 10-bit binary counter.

I have "uploaded" ROM init state file also.

Can you help me?

5 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    Do you have warnings in Modelsim related to unspecified ROM initialization file?

  • Altera_Forum's avatar
    Altera_Forum
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    Please help me, I will go crazy :| Timings are OK. Whats wrong with configuration?

  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    Please help me, I will go crazy :| Timings are OK. Whats wrong with configuration?

    --- Quote End ---

    Configuration looks OK. Check Memory List in Modelsim.
  • Altera_Forum's avatar
    Altera_Forum
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    Memory list is empty. How I can load something?

    Also I noticed that warning: "Warning (113007): Byte addressed memory initialization file "127.hex" was read in the word-addressed format"