This document provides the user guide for Altera's HardCopy II Clock Uncertainty Calculator software. The software is used for calculating clock uncertainty and the guide provides instructions for its use.
The HardCopy II Clock Uncertainty Calculator is a software tool designed to calculate clock uncertainty values for HardCopy II devices. These values are derived from sources such as PLL phase error, PLL jitter, I/O buffer noise, clock network noise, and core noise. The tool is essential for preparing timing constraints that account for clock uncertainty before starting the HardCopy II migration process.
| Software Version | 7.1 |
|---|---|
| Document Version | 1.0 |
| Document Date | August 2007 |
Clock uncertainty is the interval of confidence around the ideal clock value, such that the measured value is always within the stated interval.
Common sources include clock jitter, duty cycle distortion, and phase shift error.