Why does CONF_DONE pin fail to go high after reprogramming RBF with a matching key? - Why does CONF_DONE pin fail to go high after reprogramming RBF with a matching key? Description Due to a problem in the Intel® Quartus® Prime Pro Edition software version 21.1, if you program the Raw Binary File (.rbf) with a matching key (expect to pass), then program the RBF with a mismatched key (expect to fail), then try to program the RBF with a matching key (expect to pass), however the process will fail and you will see the following message: Error (18944): CONF_DONE pin failed to go high in device 0. Make sure all communication cables are securely connected, select a different device, check the power on the target system, or make sure all nCE pins are connected to GND. Resolution A patch is available to fix this problem for the Intel® Quartus® Prime Pro Edition software version 21.1. Download and install Patch 0.06 from the appropriate link below. > Download patch Intel® Quartus® Prime Pro Edition 21.1 Patch 0.06 for Windows (.exe) > Download patch Intel® Quartus® Prime Pro Edition 21.1 Patch 0.06 for Linux (.run) > Download the Readme for Intel® Quartus® Prime Pro Edition 21.1 Patch 0.06 (.txt) This patch is scheduled to be included in a future release of the Intel® Quartus® Prime Pro Edition software. Custom Fields values: ['novalue'] Troubleshooting 1508945787, 22012654574 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 21.2 21.1 ['Agilex™ 7 FPGA F-Series', 'Stratix® 10 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']