PM5343STXC View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM5343STXC' PDF : 198 Pages View PDF
DATA SHEET
PMC-930303
ISSUE 6
PM5343 STXC
SONET/SDH TRANSPORT OVERHEAD TRANSCEIVER
TLOP as bit serial inputs (TLD, TLOW, and TAPS). The TLOP provides the bit
serial clock for each line overhead channel (TLDCLK, TOWCLK, TAPSCLK).
Line RDI may be inserted in the transmit stream under the control of an external
input (TRDI), or a writeable register. The AUTORDI bit in the Ring Control
Register controls the immediate insertion of Line RDI upon detection of Line AIS
in the received SONET/SDH stream.
Line REI may be inserted automatically in the SONET/SDH stream under the
control of the AUTOREI bit in the Ring Control Register. Receive B2 errors are
accumulated and optionally inserted automatically in bits 2 to 8 of the third Z2
byte of the transmit stream (for STS-3/STM-1 modes), or in bits 2 to 8 of the Z2
byte of the transmit stream for STS-1 mode. Up to 8 or 24 errors may be
inserted per frame for STS-1 or STS-3/STM-1 modes, respectively.
The line BIP (B2) error detection code for the transmit stream is calculated by the
TLOP and is inserted into the line overhead. Errors may be inserted in the B2
code for diagnostic purposes. A byte serial stream, along with a frame position
indicator is passed to the Transmit Section Overhead Processor.
9.8 Transmit Section Overhead Processor
The Transmit Section Overhead Processor (TSOP) block processes the section
overhead of the transmit stream. It can be configured to process an STS-1, or an
STS-3/STM-1 stream that is presented in byte serial format at 6.48 Mbyte/s, or
19.44 Mbyte/s respectively.
The TSOP accepts an unscrambled stream in byte serial format from the
Transmit Line Overhead Processor. It optionally inserts the section data
communication channel, the order wire channel, and the user channel into the
section overhead (regenerator section) of the stream. These section overhead
channels are input to the STXC as bit serial signals (TSD, TSOW, and TSUC).
The TSOP provides the bit serial clock for each section overhead channel
(TSDCLK, and TOWCLK). The line alarm indication signal may optionally be
inserted into the data stream under the control of an external input (TLAIS), or a
microprocessor writeable register.
The section BIP-8 error detection code (B1) is calculated by the TSOP block and
is inserted into the section overhead of the transmit stream. Errors may be
inserted in the B1 code for diagnostic purposes. Framing (A1, A2) and identity
bytes (J0) are also inserted. Finally, the complete transmit stream is scrambled
and output by the TSOP in byte serial format on outputs TOUT[7:0].
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 41
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