Intel® Quartus® Prime Standard Edition User Guide: PCB Design Tools

ID 683619
Date 9/24/2018
Document Table of Contents

1.7.5. Creating I/O Assignments

I/O assignments are required in FPGA design and are also used during SSN analysis to estimate voltage noise.

Each input, output, or bidirectional signal in your design is assigned a physical pin location on the device using pin location assignments. Each signal has a physical I/O buffer that has a specific I/O standard, pin location, drive strength, and slew rate. The SSN Analyzer supports most I/O standards in a device family, such as the LVTTL and LVCMOS I/O standards.

Note: The SSN Analyzer does not support differential I/O standards, such as the LVDS I/O standard and its variations, because differential I/O standards contribute a small amount of SSN.