SDRAM Controller / PHY, DDR/DDR2 (Xilinx, NWL)




Alliance Program Tier:


  • Spartan-6 LX
  • Spartan-6 LXT

DDR/DDR2 PHY only solution

The Spartan®-6 FPGA DDR/DDR2 SDRAM PHY core was developed by Northwest Logic for distribution by Xilinx. This reference design core was designed to meet the needs of customers who have custom or legacy DDR/DDR2 controllers and require just the physical interface (PHY) solution for Spartan-6 devices. The PHY core reference design files and documentation can be downloaded directly from Xilinx (see links at right). Support for the PHY only solution is also provided by Xilinx.

Key Features

  • DDR/DDR2 multi-component and DIMM interface support
  • Support for x4 to x72 DDR2 interfaces
  • Up to 400 Mbps data rate
  • Support for x32 DDR2 components

DDR/DDR2 Complete Controller (w/PHY) Solution

The Spartan-6 FPGA DDR/DDR2 SDRAM Controller core was developed by Northwest Logic to offer customers a complete and easy to use “off the shelf” DDR/DDR2 memory interface solution. This core is distributed and supported by Northwest Logic and uses the same PHY technology as the PHY only solution above. The controller fully supports features such as Additive Latency, differential DQS, and on-die termination (ODT). The controller includes a command queue which allows new commands to be issued on every clock cycle. This results in no delay between requests, enabling up to 100% memory throughput (not including refresh cycles), even for the shortest burst length setting (BL4). Contact Northwest Logic for more information.

Key Features

  • High performance access logic with read and write queuing enables highest possible throughput for all burst length settings (BL4, BL8).
  • Up to 400 Mb/s/pin data rate on Spartan-6
  • Bank management logic monitors status of each SDRAM bank (up to 8 banks) – banks only opened or closed when necessary, minimizing access delays

Products and/or services provided by Alliance Program Members are sold or licensed solely by the Member and not Xilinx. Please be advised that Xilinx hereby disclaims any warranties, express or implied, including warranties of merchantability, fitness for a particular purpose, or noninfringement with respect to any such products and/or services.