GTS Transceiver PHY User Guide

ID 817660
Date 7/08/2024
Public
Document Table of Contents

3.4.8. RX PMA Status Signals

Table 40.  RX PMA Status Signals
Signal Name Clocks Domain/Resets Direction Description
o_rx_is_lockedtoref[N-1:0] asynchronous output CDR lock status signal.
  • 1’b1 – CDR is frequency locked to reference clock within the PPM threshold.
  • 1’b0 – CDR is not frequency locked within the PPM threshold. Applicable to PMA block only

When lockedtodata stays high, the lockedtoref signal status is insignificant.

o_rx_is_lockedtodata[N-1:0] asynchronous output RX CDR data lock status signal.
  • 1’b0: CDR is not locked to data.
  • 1’b1: CDR is locked to data. Applicable to PMA block.

When asserted, indicates that the CDR is in locked-to-data mode. When continuously asserted and does not switch between asserted and deasserted, you can confirm that the CDR is actually locked to data.

i_rx_set_locktoref[N-1:0] asynchronous input

1'b1: keep CDR in lock to reference mode.

1'b0: keep CDR in auto mode.