synplify pro e-2010.09a-1警告信息

@W: : fault_ctrl.vhd(143) | Net fault_module_logic/io_fault_reg[0] appears to be a clock source which was not identfied. Assuming default frequency.

@W:MT420 :  | Found inferred clock fault_ctrl|io_fault_reg_inferred_clock[0] with period 10.00ns. A user-defined clock should be declared on object "n:fault_module_logic.io_fault_reg[0]"


这两个警告是什么意思？

时钟的问题吧

大家有遇到过这样的问题吗?
如何解决呢？

么有见过