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发表于 2023-8-21 17:53:53
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大神,再请教个问题,我用的XCZU9芯片,BANK分布如下图
从Quad129 MGTREFCLK输入的时钟,应该可可以通过SOUTH/NORTH时钟路径路由到Quad 130的吧,为什么实际编译时,却报错呢?无论选SOUTH和NORTH,都不不行
没搞清楚这个规则到底是什么,请大神帮忙科普一下
时钟选NORTH时报错:
[Place 30-683] Sub-optimal placement for an IBUFDS_GT / GT component pair. Since the IBUFDS_GT connects to the GT on a NORTHREFCLK0/1 pin, the GT must be placed one clock region above the IBUFDS_GT.If this sub optimal condition is acceptable for this design, you may use the CLOCK_DEDICATED_ROUTE constraint in the .xdc file to demote this message to a WARNING. However, the use of this override is highly discouraged. These examples can be used directly in the .xdc file to override this clock rule.
时钟选SOUTH时报错:
[Place 30-1174] Sub-optimal placement for an IBUFDS_GT / GT component pair. Since the IBUFDS_GT connects to the GT on a SOUTHREFCLK0/1 pin, the GT must be placed one clock region below the IBUFDS_GT. If this sub optimal condition is acceptable for this design, you may use the CLOCK_DEDICATED_ROUTE constraint in the .xdc file to demote this message to a WARNING. However, the use of this override is highly discouraged. These examples can be used directly in the .xdc file to override this clock rule.
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