|
MC9S12DP512CPVE Datasheet, PDF (109/124 Pages) Freescale Semiconductor, Inc – MC9S12DP512 Device Guide V01.25 | |||
|
◁ |
MC9S12DP512 Device Guide V01.25
0
1
tmin1
tnom
tmax1
2
3
tminN
tmaxN
N-1
N
Figure A-4 Jitter Definitions
The relative deviation of tnom 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)
=
â
maxâ
â
1 â t-N-m-----â
a---tx-n--(--o-N--m---) ,
1
â
-Nt--m---â
-i--nt--n-(--o-N---m-)-
â
â
â
For N < 100, the following equation is a good fit for the maximum jitter:
J(N)
=
---j-1---
N
+
j2
J(N)
15
10
20
N
Figure A-5 Maximum bus clock jitter approximation
109
|
▷ |