mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1272

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics
The relative deviation of t
number of clock periods (N).
Defining the jitter as:
For N < 1000, 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 prescaler will eliminate the
effect of the jitter to a large extent.
1272
J(N)
nom
Figure A-5. Maximum Bus Clock Jitter Approximation
is at its maximum for one clock period, and decreases towards zero for larger
1
J N
MC9S12XDP512 Data Sheet, Rev. 2.17
=
5
max 1
J N
10
–
t
---------------------- -
N t
max
=
------- -
nom
j
1
N
N
+
j
,
2
1
–
---------------------- -
N t
t
min
20
nom
N
N
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