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标题: [求助]位置约束怎么把多个symbol组合成一个component [打印本页]

作者: Randit    时间: 2006-5-17 09:41     标题: [求助]位置约束怎么把多个symbol组合成一个component

在对DCM的位置进行约束时,提示:

ERROR ack:679 - Unable to obey design constraints (LOC=DCM_X2Y1) which require
   the combination of the following symbols into a single component:
           Dcm symbol "inst_dcm_clk/dcm_clk" (Output Signal = NULL)
           Gclk symbol "inst_dcm_clk/clk0_bufg_inst" (Output Signal = clk0_obuf)
   The constraint fragments target to conflict component type.  lease correct
   the design constraints accordingly.

小弟不太明白怎么做,请指教,3thx






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