Why does the rx_freqlocked signal get stuck high for an Rx only transceiver instances in Cyclone® IV GX devices? - Why does the rx_freqlocked signal get stuck high for an Rx only transceiver instances in Cyclone® IV GX devices? Description You may see the rx_freqlocked signal get stuck high for an Rx only transceiver instance due to a bug in Quartus® II software versions 12.0 SP2 and earlier software. Resolution To fix this problem in Quartus II 12.0 SP2 install patch Quartus II software version 12.0 SP2 patch 2.07 for Windows (.exe) Quartus II software version 12.0 SP2 patch 2.07 for Linux (.tar) Quartus II software version 12.0 SP2 patch 2.07 ReadMe file (.txt) This issue will be fixed in a future version of the Quartus II Software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Cyclone® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']