MC9S12GRMV1 Datasheet, PDF (1233/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

0
1
2
3
Electrical Characteristics
N-1
N
t_min1
t_nom
t_max1
t_minN
t_maxN
Figure A-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:
J(N)
=
⎛
max⎜
⎝
1
–
t-N-m-----_{⋅-a--t-nx----}(_o--N--m---)
,
1
–
N-t--m---⋅^{--i-t-n-n---(-o-N---m--)-}
⎞
⎟
⎠
For N < 100, the following equation is a good fit for the maximum jitter:
J(N) = --j--1---
N
J(N)
1
5
10
20
N
Figure A-5. Maximum Bus Clock Jitter Approximation
NOTE
On timers and serial modules a prescaler will eliminate the effect of the jitter
to a large extent.
Freescale Semiconductor
MC9S12G Family Reference Manual, Rev.1.23
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