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GS6151 Datasheet(PDF) 45 Page - Semtech Corporation |
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GS6151 Datasheet(HTML) 45 Page - Semtech Corporation |
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45 / 77 page  GS6151 Final Data Sheet Rev.4 PDS-060389 August 2015 45 of 77 Semtech Proprietary & Confidential www.semtech.com Note: For all PRBS7 measurements two errors are counted for each error observed. The EYE_MON_ERROR_THRESHOLD and/or PRBS_MON_ERROR_THRESHOLD values should be adjusted appropriately to get the desired BER criteria. 4.12.3 PRBS Generator A signal generator, capable of generating PRBS7 or clock pattern data, is integrated in the device. The pattern generator can be clocked by external pins (DFT_CLK_IN, DFT_CLK_IN, GS6151 only), re-timed clock from input arbitrary data or by an on-chip open-loop VCO (default). When the on-chip VCO is selected the data rate must be selected by programming the PRBSGEN_RATESEL bits of the PRBS_GEN_CTRL register. Table 4-10: Arbitrary Data Checker/Input PRBS7 Checker Registers and Equivalent Re-timed PRBS7 Checker Registers Arbitrary Data Checker/Input PRBS7 Checker Re-timed PRBS7 Checker Register Parameter Register Parameter EYE_MON_ENABLE HORIZONTAL_EYE_MON_ ENABLE PRBS_CHK_CTRL PRBS_MON_ENABLE EYE_MON_ENABLE EYE_MON_PRBS_NODATA _SET PRBS_CHK_CTRL PRBS_MON_NODATA_SET EYE_MON_SCAN_START MANUAL_SCAN_START PRBS_CTRL_0 PRBS_MON_MANUAL_START EYE_MON_SCAN_START AUTO_SCAN_START PRBS_CTRL_0 PRBS_MON_AUTO_SCAN_START EYE_MON_CONTROL_REG_0 CONTINUOUS_SCAN_ ENABLE PRBS_CTRL_1 PRBS_MON_CONTINUOUS_ ENABLE EYE_MON_CONTROL_REG_0 EYE_MON_SOFT_RESET PRBS_CTRL_1 PRBS_MON_SOFT_RESET EYE_MON_CONTROL_REG_1 MEASUREMENT_ PREDIVIDER PRBS_CTRL_2 PRBS_MON_MEASUREMENT _PREDIVIDER EYE_MON_CONTROL_REG_1 SAMPLE_INTERVAL PRBS_CTRL_2 PRBS_MON_SAMPLE_INTERVAL EYE_MON_CONTROL_REG_2 MEASUREMENT_TIME PRBS_CTRL_3 PRBS_MON_MEASUREMENT_ TIME EYE_MON_CONTROL_REG_4 ERROR_THRESHOLD PRBS_CTRL_4 PRBS_MON_PRBS_ERROR_ THRESHOLD EYE_MON_CONTROL_REG_5 MANUAL_PHASE PRBS_CTRL_5 PRBS_MON_MANUAL_PHASE EYE_MON_CONTROL_REG_6 EYE_MON_WINDOW Does Not Apply EYE_MON_CONTROL_REG_6 EYE_MON_CLEAR PRBS_CTRL_6 PRBS_MON_CLEAR EYE_MON_CONTROL_REG_6 EYE_MON_FORCE_CLEAR PRBS_CTRL_6 PRBS_MON_FORCE_CLEAR EYE_MON_STATUS_REG_2 EYE_WIDTH PRBS_STATUS_REG_0 PRBS_MON_EYE_WIDTH EYE_MON_STATUS_REG_2 STARTING_PHASE PRBS_STATUS_REG_0 PRBS_MON_STARTING_PHASE EYE_MON_STATUS_REG_3 ERROR_COUNT PRBS_STATUS_REG_1 PRBS_MON_ERROR_COUNT EYE_MON_STATUS_REG_12 EYE_MON_PRBS_NODATA PRBS_STATUS_REG_11 PRBS_MON_NODATA |
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