请问哪位大侠有知道这个报错的原因吗?
[DRC 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port SYSCLK_N is Single-Ended but has an IOStandard of DIFF_HSTL_II_18 which can only support Differential
[DRC 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port SYSCLK_P is Single-Ended but has an IOStandard of DIFF_HSTL_II_18 which can only support Differential