Why does the Intel® Quartus® Prime fitter assign the RapidIO II IP Core transceiver RX On-Chip termination with r_r2? - Why does the Intel® Quartus® Prime fitter assign the RapidIO II IP Core transceiver RX On-Chip termination with r_r2? Description The Intel Quartus Prime fitter can incorrectly assign RapidIO II IP core transceiver RX On-Chip termination resistor with r_r2 (85ohm) when correct parameter is r_r1 (100ohm). If following conditions are met, design can be at risk. Design implements RapidIO II IP core. Intel Arria 10 engineering sample device with part number that ends with ES or E2. (Production devices are not affected) Intel Quartus Prime versions prior to v16.1. Workaround/Fix To work around this problem: Manually add an RX termination assignment in the Quartus Settings File(.qsf) set_instance_assignment -name XCVR_A10_RX_TERM_SEL R_R1 -to <xcvr RX serial data name> This problem has been fixed starting in Intel Quartus Prime software version 16.1. Custom Fields values: ['novalue'] Troubleshooting FB: 442140; False ['RapidIO II (IDLE2 up to 6.25 Gbaud) IP'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 16.1 16.0 ['Arria® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']