This altdq and altdqs megafunction user guide (PDF) provides a design example to implement double data rate (DDR) I/O interface using altdq and altdqs megafunctions. This example uses the MegaWizard® Plug-In Manager in the Quartus® II software. The steps to generate the megafunctions using the MegaWizard are described in detail in the user guide.
Example
This design example illustrates how to:
- Create DDR I/O interface using the altdq and altdqs megafunction and the MegaWizard Plug-in Manager
- Implement the design and assign EP2C5T144C6 device to the project
- Compile and simulate the design
Figure1 illustrates the DDR I/O interface created using altdq and altdqs blocks.
The following design files are used in this example:
The use of this design is governed by, and subject to, the terms and conditions of the Altera Hardware Reference Design License Agreement.
Figure 1. DDR I/O Interface Using altdq & altdqs
Design Examples Disclaimer
These design examples may only be used within Altera Corporation devices and remain the property of Altera. They are being provided on an “as-is” basis and as an accommodation; 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.
