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

ID 683230
Date 11/12/2018
Document Table of Contents Guideline: Use I/O Assignment Analysis

To help with pin placement, click Processing > Start > Start I/O Assignment Analysis. The Start I/O Assignment Analysis command allows you to check your I/O assignments early in the design process. You can use this command to check the legality of pin assignments before, during, or after compilation of your design. If design files are available, you can use this command to accomplish more thorough legality checks on your design’s I/O pins and surrounding logic. These checks include proper reference voltage pin usage, valid pin location assignments, and acceptable mixed I/O standards.

Common issues with I/O placement relate to the fact that differential standards have specific pin pairings and certain I/O standards might be supported only on certain I/O banks.

If your compilation or I/O assignment analysis results in specific errors relating to I/O pins, follow the recommendations in the error message. Right-click the message in the Messages window and click Help to open the Intel® Quartus® Prime Help topic for this message.