Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributortrue dual port == 2 x M20Ks
Seems like invoking true dual port (2 R/W ports) doubles the M20K resources - is this correct and if so where is it documented? I don't see it mentioned in https://www.altera.com/en_us/pdfs/lit...
Altera_ForumHonored Contributor
Honored ContributorDocumentation is here:
http://quartushelp.altera.com/17.1/index.htm#reference/glossary/def_m20k.htm where it claims that the single M20K width is restricted to 20b when in true dual port mode. I speculate that the RAM cell shadows the memory contents in two halves and does some internal magic to appear as true dual port. I just wish Altera was more explicit about the cost for using it.
