PM5342 Datasheet, PDF (449/558 Pages) PMC-Sierra, Inc – SONET/SDH Payload Extractor/Aligner

DATA SHEET
PMC-970133
ISSUE 4
PM5342 SPECTRA-155
SONET/SDH PAYLOAD EXTRACTOR/ALIGNER
Only STS-1 (STM-0/AU3) streams are supported on the ADD and DROP buses.
The ADD buses and the DROP buses can all have different timing domains. The
SPECTRA-155 will compensate for timing differences via pointer justifications. If
configured for STS-1 (STM-0/AU3) mode, the SPECTRA-155 will only use
stream #1 on the ADD and DROP buses. If configured for STS-3 (STM-1/AU3)
mode, the SPECTRA-155 will multiplex/demultiplex the three serial ADD/DROP
bus streams into/out of the SONET/SDH stream.
12.2.4 Byte Data Mode
The Byte Data mode can be configured by setting inputs SMODE[2:0]=011B.
For Byte Data Mode operation, the SPECTRA-155 is the clock master and
"pulls" data from the system in the transmit direction and "pushes" data to the
system in the receive direction.
Only STS-1 (STM-0/AU3) and STS-3c (STM-1/AU4) line side streams are
supported for Byte Data mode.
12.2.5 Nibble Data Mode
The Nibble Data mode can be configured by setting inputs SMODE[2:0]=100B.
For Nibble Data Mode operation, the SPECTRA-155 is the clock master and
"pulls" data from the system in the transmit direction and "pushes" data to the
system in the receive direction.
Only STS-1 (STM-0/AU3) and STS-3c (STM-1/AU4) line side streams are
supported for Nibble Data mode.
12.2.6 Serial Data Mode
The Serial Data mode can be configured by setting inputs SMODE[2:0]=101B.
When configured for Serial Data mode, three independent transmit buses and
three independent receive buses are provided. As in other data modes, the
SPECTRA-155 is the clock master and "pulls" data from the system in the
transmit direction and "pushes" data to the system in the receive direction.
Only STS-1 (STM-0/AU3) and STS-3 (STM-1/AU3) line side streams are
supported.
12.2.7 Serial DS3 Mode
The Serial DS3 mode can be configured by setting inputs SMODE[2:0]=110B.
When configured for Serial DS3 mode, three independent transmit buses and
three independent receive buses are provided. In the transmit direction, the DS3
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