第７条错了吧，最后好象应该是ＯＦＦ改成ＯＮ．
7.Warning: Clock latency analysis for PLL offsets is supported for the current device family, but is not enabled措施:将setting中的timing Requirements&Option-->More Timing Setting-->setting-->Enable Clock Latency中的ＯＦＦ改成ＯＮ
多谢多谢阿
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