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Altera_Forum's avatar
Altera_Forum
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11 years ago

Effect of ROM port width of LE usage?

I created a single port ROM with a port width of 237 bits to meet my application need. However this seemed to cause the usage of around 15,000 additional logic elements. I don't think it's storing th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

The problems you are having sound like what Tricky said in the first response, where Quartus isn't mapping your HDL code to M4K elements, it's mapping it to LE's. Did you write the code yourself, or did you use one of the templates or the recommended coding guidelines?

If you use MegaWizard to create a 256-bit ROM and just connect the 237-bits you care aobut, you'll get zero LE used.