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Altera_Forum's avatar
Altera_Forum
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18 years ago

vhdl Ram block not compiled and fitted as such

Basically i have written my own simple ram block in vhdl, which is dual port which the cyclone 2 should easily be able to happen. however whenever i compile and fit it the software just puts it into ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hello,

I think, not all types of dual-port ram can be inferred from HDL. It could be easier to use a megafunction instance. Cause "dual-port from HDL" wasn't supported in previous Quartus versions, I have megafunctions instances in most designs with dual-port, for special constructs, e. g. with different port widths, you need megafunction anyway.

I noticed, that Altera IP typically uses megafunction instances even for single port RAM/ROM.

Regards,

Frank