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Altera_Forum's avatar
Altera_Forum
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10 years ago

Dual ports - infer or megawizard advantages/disadvantages

Hi all, elementary question perhaps but is there any advantage in instantiating a dual port RAM (or any memory type buffer for that matter) using the IP Catalog/Megafunction Wizard rather than inferr...
Altera_Forum's avatar
Altera_Forum
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10 years ago

Inference is usually prefered, as it allows portability into Xilinx devices. You can use attributes on infered ram to force the ram type to M9k/MLAB etc.

There are some things that cannot be infered, like write-before-read mode.

Have you read the coding style guidelines from the Quartus handbook - there is a whole section of templates to infer different styles of RAM