Intel 40G Low latency IP RX PCS Ready status low

Hi MK,

I think it might be the Ethernet link issue.

In addition, your IP core can experience loss of signal on the Ethernet link after it is established. In this case, the TX functionality is unaffected, but the RX functionality is disrupted. The following symptoms indicate a loss of signal on the Ethernet link:

• The IP core deasserts the rx_pcs_ready signal, indicating the IP core has lost alignment marker lock.

• The IP core deasserts the RX PCS fully aligned status bit (bit [0]) of the RX_PCS_FULLY_ALIGNED_S register at offset 0x326. This change is linked to the

change in value of the rx_pcs_ready signal.

• If Enable link fault generation is turned on, the IP core sets local_fault_status to the value of 1.

• The IP core triggers the RX digital reset process.

Best regards,

Zi Ying