Intel® Stratix® 10 Clocking and PLL User Guide

ID 683195
Date 9/08/2023
Public

A newer version of this document is available.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

Document Table of Contents

3.4. Guideline: Configuration Constraints

The I/O PLL configuration must obey the following constraints:

  • The phase frequency detector (PFD) and VCO each have a legal frequency range of operation.
  • The loop filter settings must be appropriate for the M counter value and user-selected bandwidth mode.

If any of these configuration constraints are violated, the I/O PLL may fail to lock or may exhibit poor jitter performance.