Hardware Evaluation; Enabling Hardware Evaluation; Updating/Regenerating The Ip Core; Regenerating An Ip Core - Lattice Semiconductor MachXO2 User Manual

supports the ability to implement the LPDDR SDRAMlpddr_eval core in isolation. Push-button implementation of
this top-level design with Synplify RTL Synthesis is supported via the project files <username>_eval.ldf located in
the \<project_dir>\lpddr_eval\<username>\impl\synplify directory.
To use this project file:
1. Choose File > Open > Project.
2. Browse to \<project_dir>\lpddr_eval\<username>\impl\synplify in the Open Project dialog box.
3. Select and open <username>.ldf. At this point, all of the files needed to support top-level synthesis and imple-
mentation will be imported to the project.
4. Select the Process tab in the left-hand GUI window.
5. Implement the complete design via the standard Diamond GUI flow.

Hardware Evaluation

The LPDDR SDRAM IP core supports Lattice's IP hardware evaluation capability, which makes it possible to create
versions of the IP core that operate in hardware for a limited period of time (approximately four hours) without
requiring the purchase of an IP license. It may also be used to evaluate the core in hardware in user-defined
designs.

Enabling Hardware Evaluation

Choose Project > Active Strategy > Translate Design Settings. The hardware evaluation capability may be
enabled/disabled in the Strategy dialog box. It is enabled by default.

Updating/Regenerating the IP Core

By regenerating an IP core with the IPexpress tool, you can modify any of its settings including device type, design
entry method, and any of the options specific to the IP core. Regenerating can be done to modify an existing IP
core or to create a new but similar one.

Regenerating an IP Core

To regenerate an IP core:
1. In IPexpress, click the Regenerate button.
2. In the Regenerate view of IPexpress, choose the IPX source file of the module or IP you wish to regenerate.
3. IPexpress shows the current settings for the module or IP in the Source box. Make your new settings in the Tar-
get box.
4. If you want to generate a new set of files in a new location, set the new location in the IPX Target File box. The
base of the file name will be the base of all the new file names. The IPX Target File must end with an .ipx exten-
sion.
5. Click Regenerate. The module's dialog box opens showing the current option settings.
6. In the dialog box, choose the desired options. To get information about the options, click Help. Also, check the
About tab in IPexpress for links to technical notes and user guides. IP may come with additional information. As
the options change, the schematic diagram of the module changes to show the I/O and the device resources
the module will need.
7. To import the module into your project, if it's not already there, select Import IPX to Diamond Project (not
available in stand-alone mode).
IPUG92_01.2, October 2012 26 LPDDR SDRAM Controller User's Guide
IP Core Generation