情景描述: 芯片:zynq7020 问题: 设计从FPGA的U19引脚上的开发板板接收时钟输入125M,并将其送到两个MMCM.使用软件:vivado2015.4在Vivado中打开合成设计后,我得到以下Crticial警告: Failed to create I/OLOGIC Route Through shape for instance MMCM_2/inst/clkin1_ibufg. Found overlapping instances within the shape: MMCM_