1.Warning: Can't achieve timing requirement clock Setup: 'hh:inst1|k:inst6|altpll:altpll_component|_clk0' along 2504 path(s). See Report window for details. H+ O/ T8 P9 ^$ H5 j+ e2.Warning: Clock period specIFied in clock requirement for clock "hh:inst1|k:inst6|altpll:altpll_component|_clk0" must be greater than or equal to the I/O edge rate limit of 5.538 ns in the currently selected device. F8 l0 n: x! D8 v! L
3.Warning: Can't achieve minimum setup and hold requirement hh:inst1|k:inst6|altpll:altpll_component|_clk0 along 209 path(s). See Report window for details. [1 @5 m& D3 P/ `$ K- @+ ~% K这是一个程序的警告信息,这种该怎么解决。时序约束的资料我已经看了很多,可以用timequest写max 。min等时序约束。但就是不知道遇到问题该从哪里下手,有没有具体讲时序约束例子的书籍吗??顺便推荐下吧》》 2 p r! P" M5 b4 z: K