BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 203
BT8375
Manufacturer Part Number
BT8375
Description
single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.BT8375.pdf
(323 pages)
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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
OSEL[3:0]
RSCALE[2:0]
VSCALE[2:0]
N8370DSE
092—CLAD Phase Detector Scale Factor (CPHASE)
—
7
RSCALE[2]
CLADO Frequency Select—Picks one of eight CLAD divider chain frequencies to output on
the CLADO pin. (Refer to
programming examples with various input timing references.)
CLAD Reference Scale Factor—Divides CLADI signal by 2
CPHASE detector. Applicable only if CEN [addr 090] is active. Allows the system to supply
CLADI frequency, up to a maximum of 128 times the desired CLADR reference frequency.
CLAD Variable Scale Factor—Divides CLADV signal by 2
CPHASE detector. Applicable only if CEN [addr 090] is active. Allows the system to select
CLADV frequency that is up to 128 times CLADR.
6
RSCALE[1]
VSCALE
RSCALE
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
5
OSEL
0000
0001
0010
0011
0100
0101
0110
0111
1xxx
Scale Factor
Scale Factor
Table 2-8, CLADO Frequencies Selection
RSCALE[0]
128
128
16
32
64
16
32
64
4
1
2
4
8
1
2
4
8
Conexant
Multiplier = T1/E1 line rate x 2
CLADO Frequency (kHz)
CLADV selected by VSEL [addr 091]
—
3
CLADR Reference
CLADR = CLADI/128
CPHASE Variable Input
CLADR = CLADI/16
CLADR = CLADI/64
CLADR = CLADI/32
CLADR = CLADI/2
CLADR = CLADI/4
CLADR = CLADI/8
CLADR = CLADI
16,384
1024
2048
4096
8192
2560
1544
1536
CLADV/128
VSCALE[2]
CLADV/64
CLADV/16
CLADV/32
CLADV/2
CLADV/4
CLADV/8
2
[VSCALE]
[RSCALE]
XSEL
3.14 Clock Rate Adapter Registers
(addr 090)
through
VSCALE[1]
to form CLADR input to
before use in the
1
2-9
for
VSCALE[0]
0
3-85
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