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PM5313 Datasheet(PDF) 87 Page - PMC-Sierra, Inc |
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PM5313 Datasheet(HTML) 87 Page - PMC-Sierra, Inc |
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87 / 646 page  PRODUCTION PMC-Sierra, Inc. PM5313 SPECTRA-622 DATASHEET PMC-1981162 ISSUE 6 SONET/SDH PAYLOAD EXTRACTOR/ALIGNER FOR 622 MBIT/S PROPRIETARY AND CONFIDENTIAL 55 Pin Name Type Pin No. Function TTOHFP Output B25 The transmit transport overhead frame position (TTOHFP) signal is used to locate the most significant bit (MSB) on the TTOH serial stream. TTOHFP is set high when bit 1 (the most significant bit) of the first framing byte (A1) should be present on the TTOH stream. When the TX_GAPSEL register bit is set low in the TTOC Overhead Control register, TTOHFP can be sampled on the rising edges of TSLDCLK, TLDCLK, TOWCLK and TOHCLK to locate the MSB of the TSLD, TLD, TSOW, TSUC, TRLOW and TOH serial input streams. In this mode, the generation of these clocks are aligned with the generation of TTOHFP. TTOHFP is updated on the falling edge of TTOHCLK. |
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