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Altera_Forum's avatar
Altera_Forum
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12 years ago

ROM outputting values incorrectly

Hello, I am working on a project for my Electrical and Computer Engineering class at my college. I am supposed to save the patterns to make each number from 0 to 255 display on 7-segment displa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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If it's a ROM MegaFunction, please consider that addresses are registered on rising edge of the clock. Data output will either appear shortly after the new address takes effect (unregistered mode) after the next clock edge (registered mode).

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Thank you, FvM! Since we set the MegaFunction to be registered for the output, I messed around with the clock's frequency in simulations and realized it was doing just what you were describing. I imagine once I can test it on hardware everything will be set. Thanks again!