Device Family: Intel® Arria® 10, Intel® Cyclone® 10, Intel® Stratix® 10

Intel Software: Quartus Prime Pro

Type: Answers

Area: Component


Last Modified: November 20, 2018
Version Found: v18.1
Bug ID: FB: 1408426345;
IP: Altera IOPLL

Warning: Failed to find atom information in IOPLL SDC: ERROR: Cannot access ENUM_IOPLL_FEEDBACK data of the encrypted atom node 111916. This operation involves an encrypted atom node. Use the BOOL_ENCRYPTED test to avoid such nodes and the error.

Description

You may see this message in Intel® Quartus® Prime software versions 18.1 or earlier if the Intel FPGA IOPLL IP  is encrypted in your design. Due to encryption, the IOPLL's auto-generated SDC file is unable to traverse the atom netlist to find the source of the IOPLL's refclk. 

Workaround/Fix

To work around this warning, manually create an SDC file for the IOPLL's refclk and output clocks to replace the SDC file that is auto-generated in the Intel Quartus Prime software.