Designing high-speed memory interfaces like DDR3, DDR3L, and LPDDR4 requires precise pinout planning to meet stringent signal integrity and timing requirements. This includes careful assignment of data strobe (DQS), data byte groups (DQ), clock signals (CK), and control/address lines.
The DDR Pin Planner Tool streamlines this complex process by automatically generating example pinouts for external memory interfaces on Lattice Nexus™ and Lattice Avant™ FPGAs. Whether you're working with a custom board or a supported Lattice Development Kit, the tool helps accelerate your design workflow and reduce manual errors.
What is the DDR Pin Planner Tool?
The DDR Pin Planner Tool is an Excel-based graphical interface that allows users to:
Select a target FPGA device and memory configuration Or choose from a list of supported Lattice development boards Based on your selection, the tool generates a set of recommended pin assignments that follow typical configuration rules and high-speed I/O guidelines. These pinouts can be directly added to your Post-Synthesis Constraint (.pdc) file in a Lattice Radiant project.
If the design passes Synthesis, Map, and Place & Route, the generated pinouts can be used for final implementation.
Note: The generated pinouts are examples of valid configurations and should be used as a reference. They are not the only valid pinout options.