CX28344 Conexant, CX28344 Datasheet
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CX28344
Manufacturer Part Number
CX28344
Description
(CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
Manufacturer
Conexant
Datasheet
1.CX28344.pdf
(195 pages)
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CX28342/3/4/6/8
Dual/Triple/Quad/Hex/Octal-Enhanced
DS3/E3 Framer
The CX28342/3/4/6/8 provides Dual, Triple, Quad, Hex, and Octal DS3/E3
framers designed to support DS3-M13, DS3-C-bit parity, E3-G.751, and
E3-G.832 transmission formats.
The CX28342/3/4/6/8 provides framing recovery for M13, M23, C-bit
parity, G.751, and G.832 formatted signals. A FIFO buffer in the receive
path can be enabled to reduce jitter on the incoming data. The CX28342/
3/4/6/8 devices allow for ease of configuration, while providing
maximum flexibility to support the transmission and recovery of industry
standard formats. It provides a flexible overhead bit generation method in
DS3/E3 modes to source overhead bits on an individual framer.
Functional Block Diagram
28348-DSH-001-B
NOTE:
The index letter i, appearing in a register’s name, represents the
channel number, one per channel.
RXPOS
RXNEG
LINECK
TXPOS
TXNEG
TCLKO
Channel 2
Channel 3
Channel 4
VCO
Framer
Framer
Framer
(Typical All Channels)
Channel 1
Framer
RXCKI
RXGAPCK
TXGAPCK
REXTCK
TEXTCK
Mindspeed Technologies™
RXMSY
TXDATI
RXDAT
TXCKI
TXSY
TEXT
ONESEC
MOTO
AD
A
ALE
RD
WR
CS
DTACK
INTR
Distinguishing Features
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Applications
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Testing
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Two, three, four, six, eight independent T3/
E3 framers in one package
Line coding supported:
"
"
Framing supported:
"
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Inserts and extracts overhead bits
Full FEAC and TDL channels support
Full Performance Monitoring support per
T1.231
Integrated Dejitter FIFO
Glueless interfaces to the following
processors:
"
"
An asynchronous processor interface
LIU Interfaces:
"
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Power Supplies and Power Consumption
"
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Digital Cross-Connect Systems
Digital PCM Switches
Access Concentrators
CSUs
ATM Switches
Concentrators
PBXs
Routers
Test Equipment
JTAG boundary scan support
T3-B3ZS, NRZ, AMI
E3-HDB3, NRZ, AMI
T3-M13, M23, C-bit parity
E3-G.751, G.832
Intel: 8051, 8151, 8031, 8751, 8x251
Motorola: 68000, 68020, 68030, 68302
Glueless interface to Conexant’s DS3/E3
LIU (CX2832/3)
Option for a definition of LIU’s clocks
polarity-sampling edge
I/O 3.3 V, input 5 V-tolerant, core 2.5 V
Requires 3.3 V and 2.5 V power
supplies. Optional 5 V supply required
for 5 V input tolerance
Low power operation (<200 mW per
port)
February
2003
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