BRAM阻塞

嗨，大家好，
最近，在我的设计中，我正在努力解决BRAM阻塞RAMB16BWE引起的问题。
给出的警告示例如下：
PhysDesignRules：812  - 块上的悬空引脚:: 16BWE>。
组件NCO使用BRAM为完整的DDS生成正弦信号。
同时，我有来自AD转换器的14位信号。
当我尝试将这两个信号相乘时，会出现上警告。
输出（乘法的结果）是某种模糊的信号，没有常识。
拜托，我非常感谢任何建议。
佩罗



以下为原文

Hi everyone,

recently, in my design, I'm struggling with a problem caused with BRAM block RAMB16BWE. Example of the warning(s) that is given is:

PhysDesignRules:812 - Dangling pin on
   block::    16BWE>.

Component NCO uses BRAM to generate sine signal for complete DDS. In the same time I have 14-bits signal from AD converter. When I try to multiply these two signals, upper warning occurs. Output (result of multiplication) is some kind of obscure signal with no common sense.

Please, I'd be very thankful for any advice.

Pero