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ID: 1959
Case Type: faq
Category: Architecture
Related To: SERDES/PCS
Family: LatticeECP2/M

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Can the SERDES input voltage threshold be modified to force the SERDES into a reset state? 

The SERDES input voltage threshold cannot be modified.  But you can adjust the SERDES register RLOS_HSET(increase or reduce the threshold) which is described on page 72 of the LatticeECP2M SERDES/PCS Usage Guide, TN1124
If the SERDES input voltage is out of the threshold set by this register, the signal ffs_rlos_lo_ch from the PCS port will be asserted. Users can reset the SERDES when the signal ffs_rlos_lo_ch is detected.