PM5350-1 Datasheet, PDF (49/196 Pages) PMC-Sierra, Inc – SATURN USER NETWORK INTERFACE

DATA SHEET
PMC-960924
ISSUE 5
PM5350 S/UNI-ULTRA
SATURN USER NETWORK INTERFACE
7.8 UTP-5 and PECL Transmitter
The line transmitter (TUTP-5) provides the accurate logic levels required to
interface with a UTP-5 twisted pair, or PECL levels to interface with an optical
interface module. It is fully compliant to the ATM Forum PMD Interface
specification for 155 Mb/s over twisted pair.
7.9 Clock Synthesis
The transmit clock is synthesized from a 19.44 MHz reference. The intrinsic jitter
is minimized when the reference frequency is 19.44 MHz. With a jitter free 19.44
MHz reference input and a low noise board layout, the intrinsic jitter is typically
less than 0.01 UI RMS and 0.10 UI peak-to-peak when measured using a band
pass filter with 12 kHz and 1.3 MHz cutoff frequencies.
7.10 Parallel to Serial Converter
The Parallel to Serial Converter (PISO) converts the internal byte serial stream to
a bit serial stream.
7.11 Transmit Section Overhead Processor
The Transmit Section Overhead Processor (TSOP) provides frame pattern
insertion (A1, A2), scrambling, section level alarm signal insertion, and section
BIP-8 (B1) insertion.
7.11.1 Line AIS Insert
Line AIS insertion results in all bits of the SONET/SDH frame being set to 1
before scrambling except for the section overhead. The Line AIS Insert Block
substitutes all ones as described when enabled through an internal register
accessed through the microprocessor interface. Activation or deactivation of line
AIS insertion is synchronized to frame boundaries.
7.11.2 BIP-8 Insert
The BIP-8 Insert Block calculates and inserts the BIP-8 error detection code (B1)
into the unscrambled data stream.
The BIP–8 calculation is based on the scrambled data of the complete STS–3c
or STS–1 frame. The section BIP–8 code is based on a bit interleaved parity
calculation using even parity. Details are provided in the references. The
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 37