Under what conditions might the Deterministic Latency PHY fail to achieve rx_syncstatus when implementing the OBSAI protocol in Arria® V GZ and Stratix® V devices? - Under what conditions might the Deterministic Latency PHY fail to achieve rx_syncstatus when implementing the OBSAI protocol in Arria® V GZ and Stratix® V devices? Description When implementing the OBSAI protocol using the Deterministic Latency PHY in Arria® V GZ and Stratix® V 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 or 3.072 Gbps PMA-PCS Data Width: 20-bits Resolution To work around this problem, follow these steps: For Quartus® II software versions before release 14.0: File an Intel PreSales Support to obtain a software patch(patch0.87). After the patch is installed, add the following assignment to your Quartus II Settings File (.qsf). set_global_assignment -name VERILOG_MACRO "SV_XCVR_CUSTOM_NATIVE_ASSERT_SYNC_STATUS_IMM=\"assert_sync_status_imm\"" Regenerate the Deterministic Latency PHY IP. Recompile your design. For Quartus II software versions 14.0 and later: Add the following assignment to your .qsf file. set_global_assignment -name VERILOG_MACRO "SV_XCVR_CUSTOM_NATIVE_ASSERT_SYNC_STATUS_IMM=\"assert_sync_status_imm\"" Regenerate the Deterministic Latency PHY IP. Recompile your design. If you are implementing both the CPRI and OBSAI protocols in a single device, open an Intel PreSales Support for further support Related Articles Under what conditions might the Deterministic Latency PHY fail to achieve rx_syncstatus when implementing the OBSAI protocol in Arria V GX/GT devices? Custom Fields values: ['novalue'] Troubleshooting 2205972129 False ['novalue'] ['novalue'] novalue novalue ['Arria® V GZ FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']