Internal Error: Sub-system: PCC, File: /quartus/periph/pcc/pcc_module.cpp, Line: 1112

Description

Due to a problem in the Intel® Quartus® Prime Pro Edition 18.0 and earlier, you may see this internal error when implementing a LVDS SERDES IP with Use external PLL option where its LVDS external ports ext_loaden and ext_fclk connect directly to top level.

Resolution

To work around the problem, connect both LVDS ext_loaden and ext_fclk to an external PLL.

This problem is scheduled to be fixed in a future release of Intel® Quartus® Prime Pro Edition Software.