文章目录接口时序AvalonStreaming接口时序ReceiveTimingTransmitTimingGMII接口时序ReceiveTimingTransmitTimingRGMII接口时序ReceiveTimingTransmitTiming如何创建.sdc约束文件三速以太网系统时钟信号创建set_input_delay，set_output_delay约束set_in