摘要:
-early表示延时的可能最小值;-late 表示延时的可能最大值。例如, set_clock_latency –source –late 1.234 sys_clk set_clock_latency –source –early 1.10 sys_clk… the board-level clock delay to sys_clk can be as late as 1.234ns and as early as 1.10ns early.可见,early和late分别表示的是延时的最小值和最大值。所以像文档的说法: -early: Specifies the early clock l 阅读全文