Forum Discussion

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

DDR2 with CYCLONE IV E series

Hi, I will design a board. I want to use either Cyclone III (EP3C120F780I7N) or Cyclone IV E (EP4CE115F29I7N) series FPGA. I have seen that there lots of boards which include Cyclone III and...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

It is the same DDR2 specification for CY3 or CY4.

I use EP4C75 with MT47H16 on my board, like CY3 FPGA DEV -DK63C120-.

The max speed depend on the speed grade of the FPGA :

C7: DDR2-333 (167MHz)

C6: DDR0-400 (200MHz)

Just be carefull with PIN assignment of the DQ group :(DQS,DM, DQx) should be connect to the same group.

More over you should be carefull with the routing, because all tracks must have the same length.

Good luck