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PM7347 Datasheet(PDF) 161 Page - PMC-Sierra, Inc |
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PM7347 Datasheet(HTML) 161 Page - PMC-Sierra, Inc |
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161 / 341 page  S/UNI®-JET Data Sheet Released Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 161 Document ID: PMC-1990267, Issue 3 SFRME When the Single Framing Bit Error (SFRME) bit is set to logic one, then the J2-FRMR will indicate (to the PMON) a single framing error for every J2 multi-frame which contains one or more framing errors. When the SFRME bit is set to logic zero, the J2-FRMR will identify every framing error to the PMON. LOSTHR[1:0] The LOS Threshold bits select the number of consecutive zeroes required before the J2- FRMR will declare LOS, and the number of bit periods without an occurrence of excess zeroes that must pass before the J2-FRMR will de-assert LOS. The thresholds are described in Table 18: Table 18 J2 FRMR LOS Threshold Configurations LOSTHR[1] LOSTHR[0] Threshold 00 15 01 31 10 63 1 1 255 Thus, if LOSTHR[1:0] = 11 binary, LOS will be declared after the 255th consecutive binary zero, and de-asserted when 255 bit periods have passed without an occurrence of a string of eight or more consecutive zeroes. |
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