Is there a known problem with the IOPLL reconfiguration feature in Arria 10 devices? - Is there a known problem with the IOPLL reconfiguration feature in Arria 10 devices? Description Yes, due to a problem with the Quartus® Prime software version 16.0 and earlier, reconfiguration of C counters in IOPLLs may not work correctly. The issue happens because the logical to physical counter mapping is not generated correctly in some compilations. This causes the intended C counter not to be reconfigured correctly when performing a reconfiguration in user mode. Resolution To work around this problem, you can manually re-order the IOPLL output counters used in the design. Follow the steps below to re-order the output counters: Put the following line into a quartus.ini file and place the file in the project directory: cpll_disable_oport_rotation=on Determine the physical output counters used in a compilation. Use the Read_PLL_Setting.tcl to read out the physical C counter settings used in the design. Refer to the README section in the tcl file for instructions on how to use the script. Download Read_PLL_Setting.tcl file Cross reference to PLL Summary Report to identify the physical counter used. Regenerate the IOPLL IP to re-order the output clock based on physical counter identified in step 2. This is not required on IOPLL used for external memory interface. EXAMPLE: Consider the following IOPLL IP and the physical counters used in a compilation Output Clock in IOPLL IP Frequency Physical Counter Outclk0 A C4 Outclk1 B C5 Regenerate the IOPLL IP with the following parameters Output Clock in IOPLL IP Frequency Outclk0 Don't Care (either A or B) Outclk1 Don't Care (either A or B) Outclk2 Don't Care (either A or B) Outclk3 Don't Care (either A or B) Outclk4 A Outclk5 B Constrain the IOPLL location based on a passing compilation. Make the necessary connection changes in the RTL files. Update the SDC file with the re-ordered clock name (if applicable). Recompile the design. This issue will be fixed in future release of the Quartus Prime software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']