Dear Sir, I am using ALTLVDS_RX IP on a Cyclone V GX device, and noticing that for some reason the rx_locked pin of PLL is never being locked. Same problem noticed when PLL is set to shared between LVDS transmitter and receiver. DPA not active.

I am using ALTLVDS_RX IP on a Cyclone V GX device, and noticing that for some reason the rx_locked pin of PLL is never being locked. Same problem noticed is PLL is set to shared between transmitter and receiver.

I am new to ALTLVDS_RX. Can you please provide me some guidelines on what might be the issue. I am using a deserializer of 8, one channel and data rate 400Mbps and clock frequency 50MHz.

Attached are the timing diagram showing that rx_locked not being asserted.