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PM7375-SC bảng dữ liệu(PDF) 33 Page - PMC-Sierra, Inc |
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PM7375-SC bảng dữ liệu(HTML) 33 Page - PMC-Sierra, Inc |
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33 / 430 page ![]() PM7375 LASAR-155 DATA SHEET PMC-931127 ISSUE 6 LOCAL ATM SAR & PHYSICAL LAYER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 17 8.2 Multipurpose Port Interface Signals (24) Pin Name Type Pin No. Feature RXPHYBP I/O 152 The receive physical layer bypass (RXPHYBP) signal selects whether or not to bypass the internal SONET PHY in the receive direction. When RXPHYBP is set high, the internal SONET PHY is bypassed and a SCI- PHY/Utopia compliant interface consisting of signals: RSOC, RRDENB, RFIFOEB and RDAT[7:0] is supported. When RXPHYBP is set low, the LASAR-155 operates normally with the internal SONET PHY. In this mode, signals RSOC, RRDENB, RFIFOFB and RDAT[7:0] can be used to interface to an external FIFO to support CBR VCs and Management cells. Under analog test mode as selected using the PMCATST bit in the LASAR-155 Master Test register, this pin is configured as an output and is used for test purposes. |
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