BT8370KPF

Manufacturer Part NumberBT8370KPF
DescriptionFully integrated T1/E1 framer and line interface
ManufacturerConexant Systems, Inc.
BT8370KPF datasheet
 

Specifications of BT8370KPF

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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Automatic Manual Transmit Alarm Indication Signal—When activated manually (TAIS) or
AUTO_AIS /TAIS
automatically (AUTO_AIS), the alarm formatter replaces all data output on TPOSO/TNEGO
and XTIP/XRING with an unframed all-1s signal (AIS). This includes replacing data supplied
from TPOSI/TNEGI and from the receiver during line loopback [LLOOP; addr 014].
Automatic mode sends AIS for the duration of receive loss of signal [RLOS; addr 047] or
receive loss of clock [RLOC; addr 047], depending on the analog or digital line interface
option [RDIGI; addr 020]. If AISCLK [addr 068] is enabled, TAIS also provides manual
switch control over ACKI clock input. AUTO_AIS does not affect ACKI switching.
AIS transmission [TAIS, AUTO_AIS; addr 075, or AISCLK; addr 068] does not affect
transmit data that is looped back to the receiver during framer loopback [FLOOP; addr 014].
This allows both FLOOP and LLOOP to be active simultaneously during loss of signal,
without disrupting data in the framer loopback path.
TAIS
0
0
0
0
1
1
NOTE:
076— Transmit Test Pattern Configuration (TPATT)
7
6
5
Enable Test Pattern Transmission.
TPSTART
PRBS Framed—When set, the PRBS pattern does not overwrite framing bit positions and is
FRAMED
stopped during these bit periods. In T1 mode, the frame bit (every 193
In E1 mode, the PRBS test pattern is not written to time slot 0 (FAS and NFAS words) and
time slot 16 (CAS signalling word) if CAS framing is also selected. CAS framing is selected
by setting TFRAME[3] to 1 in the Transmit Configuration register [TCR0; addr 070]. If
FRAMED is disabled, the test pattern is transmitted in all time slots.
Enable 0 Limit; 7/14 depending on pattern.
ZLIMIT
N8370DSE
AUTO_AIS
AISC
Transmit Data
LK
0
0
Normal, No AIS
0
1
AIS during TLOC
1
0
AIS During RLOS/RLOC
1
1
AIS During TLOC or RLOS
X
0
Manual AIS
X
1
Manual AIS and ACKI
Systems that transmit framed all ones can utilize inband loopback code generator
[TLB; addr 077] to send all ones in payload only.
4
3
TPSTART
FRAMED
Conexant
3.12 Transmitter Registers
Transmit Clock
(TCKO)
TCKI
ACKI while TLOC
TCKI
ACKI while TLOC
TCKI
ACKI
2
1
0
ZLIMIT
TPATT[1]
TPATT[0]
rd
bit) is not overwritten.
3-77