Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

true 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_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

By nature of a dual-port RAM, their can be only one storage cell for each bit, in so far it's not possible that two single port RAMs mimic a dual port RAM.

--- Quote Start ---

However, there is no mention of this restriction in the ug_ram_rom.pdf. If you have a user guide for RAM/ROM it would be very helpful to provide the restrictions on usage there of.

--- Quote End ---

Yes, it would be helpful. I see however, that the user guide only specifies the parameter ranges, but not the available combinations. It's only listed in the device handbook.