标准单元库特征化-用Liberate

亭ting

在对时序单元D触发器进行特征化时，出现了问题：

   

        

            
1. ERROR (LIB-52): The constraint search failed to find a solution within the search range for arc of cell:'DFM1RA_st', r_pin:'CK', r_pin dir:'r', pin:'D', pin dir:'r', type:'hold_rising rise_constraint', vector:'RRxx'. This cell will be marked as failed and the constraint data will be set to: 1.0 (see constraint_failed_value). To debug, review the saved simulation results for deck: hold_5. Possible causes include: 'constraint_delay_degrade' too large; 'constraint_delay_degrade_abstol' too large; 'constraint_check_final_state_threshold' too large;
           

   

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请问有人知道这是为什么吗？
在liberate的template里面，针对时序单元的define_template中的 -constraint应该怎么确定合适呐？

lei6042

看看你的config文件 hold的 constraint delay给了多少