參數資料
型號: MC9SA256BCFUR2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數: 82/102頁
文件大?。?/td> 1050K
代理商: MC9SA256BCFUR2
MC9S12A256 Device Guide — V01.01
80
Figure A-3 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:
For N < 100, the following equation is a good fit for the maximum jitter:
Figure A-4 Maximum Bus Clock Jitter Approximation
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.
23
N-1
N
1
0
tnom
tmax1
tmin1
tmaxN
tminN
JN
()
max 1
t
max
N
()
Nt
nom
-----------------------
1
t
min
N
()
Nt
nom
-----------------------
,
=
JN
()
j
1
N
--------
j
2
+
=
1
5
10
20
N
J(N)
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