Internal Error: Sub-system: S2T, File: /quartus/tsm/s2t/s2t_arm_visitors.cpp, Line: 328 - Internal Error: Sub-system: S2T, File: /quartus/tsm/s2t/s2t_arm_visitors.cpp, Line: 328 Description Due to a problem in the Quartus® II software version 10.1 and later, you may see this error during Analysis & Synthesis if your design contains a PLL with an unconnected input clock Resolution To avoid this problem, ensure that all PLLs have signals connected to their input clocks. Custom Fields values: ['novalue'] Troubleshooting novalue False ['PLL'] ['FPGA Dev Tools Quartus II Software'] novalue 10.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']