FPGA AI Suite: PCIe-based Design Example User Guide

ID 768977
Date 3/29/2024
Public
Document Table of Contents

7.2.1. PLL Adjustment

The design example build script adjusts the PLL driving the FPGA AI Suite IP clock based on the fMAX that the Quartus® Prime compiler achieves.

A fully rigorous production-quality flow would re-run timing analysis after the PLL adjustment to account for the small possibility that change in PLL frequency might cause a change in clock characteristics (for example, jitter) that cause a timing failure. A production design that shares the FPGA AI Suite IP clock with other system components might target a fixed frequency and skip PLL adjustment