信号的timing window 是什么意思

梦丽

信号的timing window 是什么意思？

xuyunlu

PrimeTime SI finds the earliest and the latest arrival
times for each aggressor net and victim net. The range of switching times, from earliest
to latest arrival, defines a timing window for the aggressor net and another timing window
for the victim net. Crosstalk timing effects can occur only when the aggressor and victim
timing windows overlap.

By default, PrimeTime SI performs crosstalk analysis using two iterations. During the
first iteration, it ignores the timing windows and assumes that all transitions can occur
at any time. This results in pessimistic crosstalk delay values. During the second and
subsequent iterations, PrimeTime SI considers the timing windows and eliminates some
victim-aggressor relationships from consideration, based on the lack of overlap between
the applicable timing windows.
When an overlap occurs, PrimeTime SI calculates the effect of a transition occurring on
the aggressor net at the same time as a transition on the victim net. The analysis takes
into account the drive strengths and coupling characteristics of the two nets.

You can download a PT user guide, this manual contains some more introduction and examples of timing windows. You will get more knowledge and better understand.

qq94043

简单理解就是一个信号 可能的最早跳变 和最晚跳变 这段时间窗就是 timing window