碌 P D 9 8 4 0 2 AT M / S O N E T ( S T S - 3 C ) F R A M E R
The 碌PD98402 implements the asynchronous transfer mode (ATM) transmission convergence (TC)
sublayer function in conformance with the ATM Forum specifications. This device allows for the trans-
porting of ATM cells over SONET/SDH networks at the STS-3c/STM-1 rate of 155.52 Mbps.
BLOCK DIAGRAM
Transmit
PMD
PMD
Interface
Receive
PMD
Serial/
Parallel
Conversion
Scrambler/
Descrambler
Cell
Delineation
HEC
Generation/
Verification
Cell
Scrambler/
Descrambler
Transmit/
Receive
FIFO
ATM
Interface
Transmit
ATM
Loopback
Loopback
Receive
ATM
Transmit
Overhead Processor
Receive
Overhead Processor
Control
Interface
Bus
Interface
Signals
OAM
Interface
Signals
83NG-9880B (1/94)
F E AT U R E S
鈥?/div>
All functionality required to insert and
extract 53-byte ATM cells into and out of
SONET frames
鈥?/div>
HEC generation, verification, and correction
鈥?/div>
Receive/transmit FIFOs for cells buffering
鈥?/div>
Scrambling and descrambling, pointer
processing, and frequency justification for
SONET frames
鈥?/div>
Framing of incoming traffic bytes
鈥?/div>
Performance monitoring of interleaved
parity bits and path status bytes
鈥?/div>
Insert/drop registers (SOH: C1#1 to #3, F1,
K2) (POH: F2, C2) for writing/reading of
SONET overhead data
鈥?/div>
Standard operation and maintenance
(OAM) function to monitor network perfor-
mance and provide alarm indication
MEDIA INTERFACE
鈥?/div>
Differential PECL signals for direct inter-
face to an optical driver/receiver module
鈥?/div>
Serial data rate of 155.52 Mbps and parallel
(byte-wide) data rate of 19.44 Mbps
GENERAL
鈥?/div>
Internal loopback at the media side and
ATM layer side
鈥?/div>
Access pins for self-testing
鈥?/div>
Low-power CMOS technology (0.8-micron)
鈥?/div>
160-pin PQFP package
A P P L I C AT I O N S
鈥?/div>
ATM adapter cards
鈥?/div>
Internetworking devices
(bridges and routers)
鈥?/div>
Workstations and servers
鈥?/div>
ATM switches and hubs
鈥?/div>
ATM test equipment
AT M L AY E R I N T E R FA C E
鈥?/div>
UTOPIA interface
鈥?/div>
Generic 8-bit microprocessor bus interface
for configuration, control, and monitoring
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