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BT8376EPF Datasheet(PDF) 72 Page - Synaptics Incorporated.

Part # BT8376EPF
Description  single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
PDF  323 Pages
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Manufacturer  CONEXANT [Synaptics Incorporated.]
Direct Link  https://www.synaptics.com/
Logo CONEXANT - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 72 Page - Synaptics Incorporated.

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2.0 Circuit Description
Bt8370/8375/8376
2.6 Clock Rate Adapter
Fully Integrated T1/E1 Framer and Line Interface
2-44
Conexant
N8370DSE
Step 4
Configure RSCALE, VSCALE, VSEL, and XSEL from Table 2-9 which contains
configuration examples. Again, in some cases, two or more configurations are
possible for each frequency option. Many other RSCALE and VSCALE values
are also applicable. RSCALE is a programmable frequency divider which scales
the CLADI clock frequency before it is applied to the CLAD phase detector,
CPHASE. Similarly, VSCALE scales the CLAD internal feedback clock,
CLADV. These two clocks must have the same frequency at the phase detector’s
input for the CLAD loop to properly lock. The rule is
(CLADI Reference freq)
÷ (RSCALE factor) = (CLADV freq) ÷ (VSCALE factor).
Table 2-9. Common CLADI Reference Frequencies and CLAD Configuration Examples (1 of 2)
CLADI
Reference
(kHz)
RSCALE
Phase
Compare
Frequency
(kHz)
VSCALE
CLADV
(kHz)
T1/E1
VSEL
XSEL
8
0
8
7
1024
X
0
X
16
0
16
6
1024
X
0
X
32
0
32
5
1024
X
0
X
64
0
64
4
1024
X
0
X
128
0
128
3
1024
X
0
X
256
0
256
2
1024
X
0
X
512
0
512
1
1024
X
0
X
1024
0
1024
0
1024
X
0
X
2048
0
2048
0
2048
X
1
X
7
16
7
2048
X
1
X
0
2048
0
2048
0
7
0
4096
0
4096
0
4096
X
2
X
7
32
7
4096
X
2
X
1
2048
1
4096
0
7
1
8192
0
8192
0
8192
X
3
X
7
64
7
8192
X
3
X
2
2048
2
8192
0
7
2
16384
0
16384
0
16384
X
8
X
7
128
8
1024
X
0
X
0
16384
0
16384
0
7
3
1536
2
384
2
1536
X
6
X
1544
2
386
2
1544
X
5
X
2
386
2
1544
1
7
0



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