Description
Due to a problem in Intel® Quartus® Prime Pro software release version 18.0, Stratix® 10 Serial Flash Mailbox Client Intel® FPGA IP Core is not able to access flash memory when OSC_CLK_1 is selected as the configuration clock source for Intel Stratix® 10 devices.
Resolution
This known problem is scheduled to be fixed in future release of the Intel Quartus Prime Pro software.