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BT8376EPF Datasheet(PDF) 158 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) 158 Page - Synaptics Incorporated.

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Bt8370/8375/8376
3.7 Receive LIU Registers
Fully Integrated T1/E1 Framer and Line Interface
3-40
Conexant
N8370DSE
021—Receive LIU Status (RSTAT)
CPDERR
CLAD Phase Detector Error—Indicates the CLAD phase detector has lost lock with respect to
the selected CLADI reference clock.
JMPTY
JAT Empty/Full—Indicates whether the elastic store is within two unit intervals of being
empty or two unit intervals of being full. JMPTY is not updated (holds its prior value) until the
elastic store is within two unit intervals of its limit. The processor reads JMPTY and CPDERR
to determine what event caused JERR or CKERR [addr 006].
ZCSUB
Zero Code Substitution—Indicates one or more B8ZS/HDB3 substitution patterns have been
detected on receiver input data, depending on T1/E1N [addr 001] line rate selection. ZCSUB is
reported, regardless of whether or not ZCS decoding is enabled [RAMI; addr 040]. ZCSUB is
latched active high upon detection of the first ZCS pattern, and the active high hold interval is
defined by LATCH_ERR [addr 046].
EXZ
Excessive Zeros—Reports one or more long strings of 0s detected on RTIP/RRING data
inputs. Depending on bits RZCS [addr 040] and T1/E1N [addr 001], occurrences of 8, 10, or
16 consecutive zeros are detected. EXZ is latched active high upon detection of the first error.
The active high hold interval is defined by LATCH_ERR [addr 046]. If EXZ_LCV [addr 045]
is enabled, EXZ errors are also accumulated in LCV count [addr 054, 055].
7
6
5
4
3
2
1
0
CPDERR
JMPTY
ZCSUB
EXZ
BPV
—
EYEOPEN
PRE_EQ
JMPTY
JERR
JAT Status
X0
No error
0
1
JAT Overflow
11
JAT Underrun
ZCSUB
T1/E1N
ZCSUB Status
0
X
No ZCS patterns detected
1
0
HDB3 pattern detected
1
1
B8ZS pattern detected
EXZ
T1/E1N
RZCS
EXZ Status
0
X
X
No error
1
0
X
10 consecutive 0s
1
1
0
16 consecutive 0s
1
1
1
8 consecutive 0s



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