mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 646

• Manufacturer Part Number: mc9s12hz256v2
• Description: Hcs12 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 < 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.
646
J N
J N
=
=
0
------- -
max 1
j
1
N
t
+
min1
t
nom
t
max1
j
2
J(N)
–
t
-------------------- -
N t
max
1
nom
Figure A-5. Maximum bus clock jitter approximation
1
nom
is at its maximum for one clock period, and decreases towards zero for larger
N
,
5
MC9S12HZ256 Data Sheet, Rev. 2.05
1
Figure A-4. Jitter Definitions
–
2
-------------------- -
N t
t
min
10
nom
N
t
minN
t
maxN
3
20
N–1
N
Freescale Semiconductor
N