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GLees's avatar
GLees
Icon for Contributor rankContributor
2 years ago

Cyclone 10GX EMIF Won't fit DDR3 X16

I'm trying to implement a X16 DDR3 EMIF in a single bank (2K) of a Cyclone 10GX220. Quartus gives me an error saying that it won't fit. There are enough pins in the bank if I omit the DM signals. I...
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sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
2 years ago

IIRC, each bank is only 48 pins and 3 of the 4 I/O lanes (12 pins each) must be used for address/command. That means you can only fit a x8 EMIF in a single bank (DQ + DQS pins in the 4th lane leaving 3 unused pins). You would need 2 banks for x16.