Datasheet

MC9S12DT128B Device User Guide — V01.09
Figure A-3 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 A-4 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)
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nc
.
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