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MFC2000 Datasheet(PDF) 377 Page - List of Unclassifed Manufacturers

Part # MFC2000
Description  Multifunctional Peripheral Controller 2000
PDF  426 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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MFC2000 Datasheet(HTML) 377 Page - List of Unclassifed Manufacturers

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Hardware Description
MFC 2000 Multifunctional Peripheral Controller 2000
100723A
Conexant
22-3
Figure 22-3 illustrates an example of the CPC operation with CPCThreshold containing a value of 4.
CP C sign a l
CP C cou n t
S a m p ling C P C
01
2
0
12
34
0
C oun tE Q T hr
CP CF la g
Fa ls e
On -H o o k
Sig n a l
C P C S tatC trlW R n
C P C S tatC trlR D n
T h is n oise w ill b e filtered ou t.
1
2
3
4
Figure 22-3: CPC Operation (with CPCThreshold = 4)
Note:
1.
Writing to CPCStatCtrl register will clear CPC Flag.
2.
Whenever both CPC signal and CPC Flag are low, the counter is reset in order to restart the
counting sequence. The previous counter value is regarded as the result from a noise signal.
This condition is only checked at every sampling time. In other words, if it happens between
the sampling time, then the noise will be filtered out.
3.
As soon as the counter value is equal to the threshold value, CPC Flag is raised.
4.
Once CPC Flag has been raised, the counter will be clear on the next sampling clock.
Figure 22-4 illustrates the CPC block diagram.



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