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

ID 683641
Date 12/04/2023
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

1.2.1. Initial I/O Assignment Guidelines

The I/O standard and drive strength requirements that you specify for your design affect the I/O timing. Follow these guidelines when specifying initial I/O assignments:
  • When specifying I/O assignments, specify 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.