The time interval separating the points on the rising or falling edges is then estimated to yield the
rise or fall time. These results are averaged over the number of transition edges that occur within
the observation window.
Rising Edge Duration
Falling Edge Duration
Where Mr is the number of leading edges found, Mf the number of trailing
edges found,
the time when rising edge i crosses the x% level,
and the time when falling edge i crosses the x% level.
Determining Time Parameters
Time parameter measurements such as width, period, and delay are carried out with respect to
the mesial reference level (see Figure 2 as follows), located halfway (50%) between the top and
base reference lines.
152 SDA-OM-E Rev H
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