MC9S12A128 MOTOROLA [Motorola, Inc], MC9S12A128 Datasheet - Page 78

• Manufacturer Part Number: MC9S12A128
• Description: Microcontroller unit (MCU)
• Manufacturer: MOTOROLA [Motorola, Inc]

The relative deviation of t
number of clock periods (N).
Defining the jitter as:
For N < 100, the following equation is a good fit for the maximum jitter:
This is very important to notice with respect to timers, serial modules where a pre-scaler will eliminate the
effect of the jitter to a large extent.
0
t
min1
t
nom
t
max1
J(N)
Figure A-4 Maximum Bus Clock Jitter Approximation
nom
1
1
is at its maximum for one clock period, and decreases towards zero for larger
J N
5
Figure A-3 Jitter Definitions
=
max 1
2
10
J N
–
t
---------------------- -
N t
t
max
minN
t
=
maxN
------- -
nom
j
1
N
N
3
+
,
j
2
1
–
20
---------------------- -
N t
t
min
nom
MC9S12A128 Device Guide — V01.01
N
N-1
N
N
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