Is rx clock produced even when receiving signal is lost ?
If signal is lost, RXD[15..0], RX_DV and RX_ER should be high; but I don't know whether RX_CLK is produced or not.
In the case where the serial input to the device (TLK2501/TLK1501..) is lost, the RX_CLK will likely track the device's GTX_CLK or the CDR as it tries to lock. You can check this by removing the GTX_CLK and observing the behavior of the RX_CLK.
I will try to ask by another way. Can I clock receive data bus terminals (signals RXD, RX_DV and RX_ER) by RX_CLK when input serial signal is lost ? I purpose to use it for the detection of loss of signal.
When the incoming serial signal is lost, the parallel output data singles (RD) are not valid and RX_CLK is not guaranteed to be at the correct frequency needed for your application so using RX_CLK may not provide expected results consistently. The RX_DV/LOS pin provides LOS condition indication for the device.
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