MC9S12DT512 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MC9S12DT512' PDF : 124 Pages View PDF
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)
=
⎛
max⎜
⎝
1 – t-N-m-----⋅a---tx-n--(--o-N--m---) ,
1
–
-Nt--m---⋅-i--nt--n-(--o-N---m-)-
⎞
⎟
⎠
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
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