External Memory Interface Handbook Volume 2: Design Guidelines

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ID 683385
Date 5/08/2017
Public
Document Table of Contents

10.1.6. Optimizing Design Utilization

As device utilization increases, the Quartus Prime software may have difficulty placing the core. To optimize design utilization, follow these steps:
  1. Review any fitter warning messages in multiple IP designs to ensure that clock networks or PLL modes are not modified to achieve the desired fit.
  2. Use the Quartus Prime Fitter resource section to compare the types of resources used in a successful standalone IP implementation to those used in an unreliable multiple IP implementation.
  3. Use this information to better constrain the project to achieve the same results as the standalone project.
  4. Use the Chip Planner (Floorplan and Chip Editor) to compare the placement of the working stand-alone design to the multiple IP project. Then use LogicLock™ or Design Partitions to better guide the Quartus Prime software to the required results.
  5. When creating LogicLock regions, ensure that they encompass all required resources. For example, if constraining the read and write datapath hierarchy, ensure that your LogicLock region includes the IOE blocks used for your datapath pin out.

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