Network Device User Guide

Device User Guide — 9S12C128DGV1/D V01.05
114
Figure B-4 Jitter Definitions
The relative deviation of t
nom
is at its maximum for one clock period, and decreases towards zero for larger
number of clock periods (N).
Defining the jitter as:
For N < 100, the following equation is a good fit for the maximum jitter:
Figure B-5 Maximum bus clock jitter approximation
2 3 N-1 N1
0
t
nom
t
max1
t
min1
t
maxN
t
minN
JN() max 1
t
max
N()
Nt
nom
⋅
---------------------
– 1
t
min
N()
Nt
nom
⋅
---------------------
–,



=
J
N()
j
1
N
--------
j
2
+=
1 5 10 20 N
J
(N)