没有使用DCM的status信号，但是综合后出现个警告
xilinx的DCM，我不需要status信号，所以在新建DCM核时并未勾选。但是综合后出现这个警告
WARNING:Line 132: Assignment to status_int ignored, since the identifier is never used
另外还有个警告好像也是它产生的
WARNING:1 internal tristate is replaced by logic (pull-up yes): N39.
请问这是怎么回事？怎么消除啊？
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