PM4354
COMET-QUAD
Four Channel Combined E1/T1/J1 Transceiver/Framer
FEATURES
• Monolithic device that integrates four
T1/E1 framers and line interfaces for
shorthaul and longhaul applications.
• Software selectable between T1/J1
and E1 operation on a per device
basis.
• Provides digitally programmable
longhaul and shorthaul pulse
templates and line build out.
• Meets or exceeds T1/J1 and E1
shorthaul and longhaul network access
specifications including ANSI T1.102,
T1.403, T1.408, AT&T TR 62411, ITU-
T G.703, G.704 as well as ETSI 300-
011, CTR-4, CTR-12 and CTR-13.
• Provides encoding and decoding of
B8ZS, HDB3 and AMI line codes.
• Provides receive equalization, clock
recovery and line performance
monitoring.
• Provides transmit and receive jitter
attenuation.
• Provides four full-featured HDLC
controllers, each with 128-byte
transmit and receive FIFO buffers.
• Provides a two-frame payload slip
buffer to allow independent backplane
and line timing.
• Automatically generates and transmits
DS-1 performance report messages to
ANSI T1.231 and ANSI T1.408
specifications.
• Provides PRBS generators and
detectors on each tributary for error
testing at DS1, E1 and N x 64 Kbit/s
rates as recommended in ITU-T O.151
and O.152.
• Provides an 8-bit microprocessor bus
interface for configuration, control, and
status monitoring.
• Uses line rate system clock.
• Provides an IEEE P1149.1 (JTAG)
compliant test access port (TAP) and
controller for boundary scan test.
• Implemented in a low power 2.5/3.3 V
CMOS technology.
• Available in a high density 208-pin fine
pitch PBGA (17 mm by 17 mm)
package.
• Provides a -40 °C to +85 °C industrial
temperature operating range.
RECEIVER
• Typical signal recovery of up to -43 dB
at 1024 kHz (E1) and up to -44 dB at
772 kHz (T1/J1).
• Guaranteed minimum signal recovery
of -32 dB at 1024 kHz (E1) and
-36 dB at 772 kHz (T1/J1) using
PIC-22 gauge cable emulation.
• Frames to DSX/DS-1 signals in SF,
and ESF formats.
• Frames to ITU-T G.704 basic and
CRC-4 multiframe formatted E1
signals. The framing procedures are
consistent with ITU-T G.706
specifications.
• Frames to TTC JT-G704 multiframe
formatted J1 signals. Supports the
alternate CRC-6 calculation for
Japanese applications. Frames in the
presence of and detects the Japanese
yellow alarm.
• Tolerates more than 0.4 UI peak-to-
peak, high frequency jitter as required
by AT&T TR 62411 and Bellcore TR-
TSY-000170.
• Provides programmable in-band
loopback activate and deactivate code
detection.
BLOCK DIAGRAM
BTCLK[1:4]
XIBC
Inband
Loopback
Code
Generator
XPDE
Pulse
Density
Enforcer
T1-XBAS/E1-TRAN
Basic Transmitter,
Frame Generation,
Alarm Insertion,
Signaling Insertion,
Trunk Conditioning
Tx-ELST
Transmit
Elastic
Store
TPSC
Per-DS0
Controller
BTIF
Backplane
Transmit
System
Interface
BTSIG[1:4]
BTFP[1:4]
BTPCM[1]/CASBTD
BTPCM[2:4]
CCSBTD
MVBTD
TxTIP1[1:4]
TxTIP2[1:4]
TxRING1[1:4]
TxRING2[1:4]
XLPG
Transmit LIU
TJAT
Digital Jitter
Attenuator
TxCM[1:4]
A[10:0]
XCLK
CTCLK
RSYNC
CSD
Clock
Synthesis and
Distribution
TOPS
Timing
Options
TDO
TDI
TCK
TMS
TRSTB
RDB
TDPR
HDLC
Transmitter
XBOC
Bit Oriented
Code Dector
PRBS
Pattern
Generator/
Detector
MPIF
Micro-
processor
Interface
WRB
CSB
ALE
INTB
RSTB
RDLC
HDLC
Receiver
D[7:0]
PIO
CMV8MCLK
CMVFPC
CMVFPB
JTAG
Test Access
Port
PMON
Performance
Monitor
Counters
T1-APRM
Auto
Performance
Response
Monitor
ALMI
Alarm
Integrator
RBOC
Bit Oriented
Code Dector
RxTIP[1:4]
RxRING[1:4]
RLPS
Receive LIU
CDRC
Clock and
Data
Recovery
RJAT
Digital Jitter
Attenuator
IBCD
T1/E1-FRMR
Inband
Frame Align-
Loopback Code ment, Alarm
Detector
Extraction
PDVD
Pulse Density
Violation
Detector
BRCLK[1:4]
SIGX
Signalling
Extractor
RPSC
Per-DS0
Controller
BRIF
Backplane
Receive
System
Interface
BRSIG[1:4]
BRFP[1:4]
BRPCM[1]/CASBRD
BRPCM[2:4]
CCSBRD/
MVBRD
RVREF[1:4]
One of Four
T1/J1 or E1
Transceiver/Framers
FRAM
Framer RAM
Rx-ELST
Receive
Elastic Store
PMC-2000091 (r3)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
© Copyright PMC-Sierra, Inc. 2001
PMC [ PMC-SIERRA, INC ]
