Reading Overshoot/Undershoot Specification Tables

The overshoot/undershoot specification for the processor is not a simple single value. Instead, many factors are needed to determine the over/undershoot specification. In addition to the magnitude of the overshoot the width of the overshoot is needed. To determine the allowed overshoot for a particular overshoot event, the following must be done:

1. Determine the signal group a particular signal falls into.
2. Determine the magnitude of the overshoot or the undershoot.
3. Determine the duration of the undershoot or the overshoot.
4. Compare the values obtained with the maximum overshoot/undershoot magnitude, if this value exceeds the nominal voltage rail, then the duration should be measured, if this value surpasses the maximum overshoot/undershoot duration then this case is a violation.

Undershoot events must be analyzed separately from overshoot events as they are mutually exclusive.