整个warning是这样的:
Warning: Pin 'u_gala/U_Mirror/code_out_reg[0]/Q'(VDD2[0.72v]) cannot drive 'u_gala/code_out_d1_reg[0]/next_state'(VDD_gala[0.88v]) due to voltage differences (effective strategy is [rule = low_to_high, threshold = 0.01]). (MV-231)
这个是因为level shifter没有插入导致的吗?但是我的upf文件里是定义了level shifter的,不过跑综合的报告还是显示没有level shifter插入:
Information: Total 0 level shifters are removed. (MV-238)
Information: Total 0 level shifters are inserted. (MV-239)
Warning: 19 nets required level shifters but matching level shifters were not found. (MV-611)
Information: Exploring level shifting on net 'u_gala/code_out_tmp[4]' to shift from supply VDD2[LV] to VDD_gala[HV,OFF]: supply VDD_gala is not available in domain pd_gala. (MV-610a)