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GS12181 Datasheet(PDF) 28 Page - Semtech Corporation |
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GS12181 Datasheet(HTML) 28 Page - Semtech Corporation |
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28 / 68 page  GS12181 Final Data Sheet Rev.5 PDS-060905 October 2016 28 of 68 Semtech Proprietary & Confidential www.semtech.com 4.3.5.3 Output Balanced Mode The GS12181 has a feature designed to facilitate reliable output return loss (ORL) measurement while the device is still powered. The device can be put into a BALANCE mode which prevents the outputs from toggling while ORL is being measured. BALANCE mode can be enabled through the host interface, by setting control parameter CTRL_OUTPUT<n>_ BALANCED in register 734D to 1b, where <n> is the output number. 4.3.5.4 Output Control and Status Registers Summary The following two tables list the most commonly used control and status parameters of the Output blocks. For a complete list of registers and functions, please see Section 5. Table 4-7: Re-timer Bypass Control Parameters Addressh Bit Slice Parameter Name Description 0x734C 3:3 CTRL_OUTPUT1_RETIMER_MANUAL _BYPASS Enables manual CDR bypass signal when CTRL_OUTPUT1_RETIMER_AUTO_BYPASS is 0b. 2:2 CTRL_OUTPUT1_RETIMER_AUTO _BYPASS Sets or disables the automatic CDR bypass signal mode. 1:1 CTRL_OUTPUT0_RETIMER_AUTO _BYPASS Enables manual CDR bypass signal when CTRL_OUTPUT0_RETIMER_AUTO_BYPASS is 0b. 0:0 CTRL_OUTPUT0_RETIMER_MANUAL _BYPASS Sets or disables the automatic CDR bypass signal mode. Table 4-8: Output Swing and Pre-emphasis Control Parameters Addressh Bit Slice Parameter Name Description 0x732B/0x7329 13:8 CFG_OUTPUT<n>_CD_SD_TD_DRIVER_SWING Output <n> main output driver amplitude configuration parameter for SD and MADI. 0x732A/0x7328 12:8 CFG_OUTPUT<n>_CD_SD_TD_ PREEMPH_WIDTH Output <n> pre-emphasis pulse width configuration parameter for SD and MADI. 6:6 CFG_OUTPUT<n>_CD_SD_TD_ PREEMPH_PWRDWN Output <n> pre-emphasis power down parameter for SD and MADI. 5:0 CFG_OUTPUT<n>_CD_SD_TD_ PREEMPH_AMPL Output <n> pre-emphasis pulse amplitude configuration parameter for SD and MADI. 0x732D/0x732F 13:8 CFG_OUTPUT<n>_CD_HD_DRIVER_SWING Output <n> main output driver amplitude configuration parameter for HD and 3G. |
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