mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 576

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics
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 prescaler will eliminate the
effect of the jitter to a large extent.
576
0
t
min1
t
nom
t
max1
J(N)
1
nom
is at its maximum for one clock period, and decreases towards zero for larger
1
J N
MC9S12E256 Data Sheet, Rev. 1.08
5
=
Figure A-3. Jitter Definitions
2
max 1
⎛
⎜
⎝
J N
10
–
t
---------------------- -
N t
t
max
minN
=
t
maxN
------- -
nom
j
1
N
N
3
+
j
,
2
1
–
---------------------- -
N t
t
min
20
nom
N
⎞
⎟
⎠
N-1
N
Freescale Semiconductor
N