When implementing the OBSAI protocol using the Deterministic Latency PHY in Arria® V GX/GT devices, you may fail to achieve rx_syncstatus when IDLE, IDLE_ACK and IDLE_REQ patterns are sent during the link up process. You can achieve synchronization by retriggering rx_patternalign or asserting rx_digitalreset.
This applies to the Deterministic Latency PHY with the following configuration.
- Data Rate: 6.144 Gbps
- PMA-PCS Data Width: 20-bits