Intel® Quartus® Prime Standard Edition User Guide: Design Optimization

ID 683230
Date 11/12/2018
Document Table of Contents

1.2.1. Guidelines for I/O Assignments

In a FPGA design, I/O standards and drive strengths affect I/O timing.
  • When specifying I/O assignments, make sure that the Intel® Quartus® Prime software is using an accurate I/O timing delay for timing analysis and Fitter optimizations.
  • If the PCB layout does not indicate pin locations, then leave the pin locations unconstrained. This technique allows the Compiler to search for the best layout. Otherwise, make pin assignments to constrain the compilation appropriately.