PCI Express to DDR2 SDRAM Reference Design
from Altera Corporation
Overview
Altera offers a PCI Express to DDR2 SDRAM reference design that demonstrates the operation of Altera's PCI Express (PCIe) MegaCore® product. This reference design provides an interface between the Altera® PCIe MegaCore function and the Altera DDR2 SDRAM Controller MegaCore function that enables access to external DDR2 SDRAM memory through the PCIe bus. It also represents an example of a typical user application that interfaces to the system side of the Altera PCIe MegaCore function.
Features
- Supports PCIe root complex to PCIe end point memory read and write transactions
- Supports PCIe end point to PCIe root complex direct memory access (DMA) read and write transactions
- Demonstrates how to use the PCIe MegaCore function
- Demonstrates how to use the DDR2 SDRAM Controller MegaCore function
- Also demonstrates how to use the DDR2 SDRAM High-Performance Controller MegaCore function
- Uses the dual-port FIFO buffer function from the library of parameterized modules (LPM)
- Supports the Stratix® II GX FPGA with internal transceivers
- Also supports the ArriaTM GX FPGA with internal transceivers
Demonstrated Altera Technology
- Stratix II GX and Arria GX FPGAs with transceiver technology
- Altera PCIe MegaCore function
- Altera DDR2 SDRAM Controller MegaCore function (for the Stratix II GX FPGA version)
- Altera DDR2 SDRAM High-Performance Controller MegaCore function (for the Arria GX FPGA version)
Block Diagram

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Reference Designs Disclaimer
These reference design illustrations may be used within Altera Corporation devices only and remain the copyrighted property of Altera. They are being provided on an "as-is" basis and as an accommodation, and therefore all warranties, representations, or guarantees of any kind (whether express, implied or statutory) including, without limitation, warranties of merchantability, non-infringement, or fitness for a particular purpose, are specifically disclaimed. Altera expressly does not recommend, suggest, or require that these examples be used in combination with any other product not provided by Altera.
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