Prime Time中一个常见的问题,请教
时间:10-02
整理:3721RD
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正在学习PT,运行结果提示:
the arc between pins 'CK' and 'D' is negative, which is not allowed. To make it positive, the maximum hold value has been adjusted from 0.729405 to 0.782819.
请问:1. 修改那里,才能保证是正值。
2. 有没有可能是时序约束没有写好造成的,和设计无关呢?
3. the maximum hold value has been adjusted from 0.729405 to 0.782819. 是已经自动修改过的意思吗?
the arc between pins 'CK' and 'D' is negative, which is not allowed. To make it positive, the maximum hold value has been adjusted from 0.729405 to 0.782819.
请问:1. 修改那里,才能保证是正值。
2. 有没有可能是时序约束没有写好造成的,和设计无关呢?
3. the maximum hold value has been adjusted from 0.729405 to 0.782819. 是已经自动修改过的意思吗?
P&R的时候hold time check没做好。使PT的hold time 不满足。
重做P&R。
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