你好，我的Kintex实现收到以下MAP警告：PhysDesignRules：2400-MMCME2_ADV块引脚不会驱动与其他CLKOUT引脚相同的BUFFER负载。来自不同缓冲器类型的路由将不是相位对齐的，因此可能无法满足IO触发器的零保持时间。确实如此，因为我需要将时钟驱动到多个时钟区/ bank，因此我有一个BUFMR / BUFR链（与BUFMR相连的时钟输出然后驱动两个BUFR，为两个时钟区提供时钟） 。当我收到上述警告时，我试图对CLKFBOUT做同样的事情（在FBOUT和FBIN之间有一个BUFMR / BUFR链），但我得到了一个MAP错误，说明CLKFBIN是不可能的。我的输入时间非常紧张，所以我想知道这个问题是否有助于它。任何人都可以提出一种方法来消除这种警告，并可能改善时机吗？先谢谢你。饶以上来自于谷歌翻译以下为原文Hello, I am getting the following MAP warning for my Kintex implementation : PhysDesignRules:2400 - The MMCME2_ADV blockpin does not drive the same kind of BUFFER load as the other CLKOUT pins. Routing from the different buffer types will not be phase aligned and therefore zero hold time at the IO flip-flop(s) may not be met. That was indeed the case because I needed to drive my clock to more than one clock region/bank, so I had a BUFMR/BUFR chain (clockout tied to BUFMR which then drives the two BUFR's that supply the clocks to the two clock regions). When I got the above warning, I tried to do that same for CLKFBOUT (by having a BUFMR/BUFR chain between FBOUT and FBIN), but I got a MAP error saying that is not possible for CLKFBIN. My input timing is very tight, so I am wondering if this issue is contributing to it. Could anyone suggest a way to make this warning go away, and potentially improve timing? Thank you in advance. Rao
2018-10-23 10:18
