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PM5342 Datasheet(PDF) 49 Page - PMC-Sierra, Inc |
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PM5342 Datasheet(HTML) 49 Page - PMC-Sierra, Inc |
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49 / 558 page ![]() PM5342 SPECTRA-155 DATA SHEET PMC-970133 ISSUE 4 SONET/SDH PAYLOAD EXTRACTOR/ALIGNER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 27 8 PIN DESCRIPTION (256) Table 2 - Line Side Interface Signals (20) Pin Name Pin Type PIN No. Function RBYP Input U16 The receive bypass (RBYP) input selects whether to bypass the CRU. If RBYP is high, the internal CRU is bypassed and RRCLK+/- should contain the receive line clock used to sample RXD+/-. If RBYP is low, the internal CRU is used and RRCLK+/- should contain the reference clock. RXD+ RXD- PECL Input W12 W11 The receive differential data inputs (RXD+, RXD-) contain the 155.52 Mbit/s receive STS-3/3c (STM-1/AU3/AU4) stream or the 51.84 Mbit/s receive STS-1 (STM-0/AU3) stream. RXD+/- are sampled on the rising edge of RRCLK+/- when clock recovery is disabled (the falling edge may be used by reversing RRCLK+/-). Otherwise the receive clocks are recovered from the RXD+/- bit stream. RXD+/- is expected to be NRZ encoded. Clock recovery bypass is selectable using the RBYP input signal. |
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