GTS Transceiver PHY User Guide

ID 817660
Date 4/01/2024
Public

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3.8.8. RX Data Loss/CDR Lock Loss (Auto-Recovery)

Figure 54. Reset Sequence for RX Data Loss or CDR Lock Loss
The figure above illustrates RX auto recovery feature in the event of RX data loss or a CDR lock loss:
  1. o_rx_is_lockedtodata deasserts, indicating CDR lost lock of the data.
  2. o_rx_islockedtoref deasserts, indicating CDR lost lock of the reference clock.
  3. Consequently, o_rx_ready deasserts, indicating that the datapaths are no longer operational.
  4. o_rx_reset_ack asserts and then automatically deasserts, indicating that the datapaths are in reset (auto recovery).
  5. o_rx_is_lockedtoref asserts as the CDR locks to the reference clock.
  6. o_rx_islockedtodata asserts as the CDR locks to the recovered data.
  7. o_rx_ready asserts, indicating that the RX datapath are ready for use.