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大家好,最近我在写一个数据储存的VHDL代码,当我再给一个时钟管脚分配位置时,出现如下错误,弄了好半天也没弄明白,希望路过的高手能指点指点,谢谢啦!!!
ERROR ack:1107 - Unable to combine the following symbols into a single IOB
component:
PAD symbol "fosc_j" (Pad Signal = fosc_j)
BUF symbol "fosc_j_IBUF" (Output Signal = fosc_j_IBUF)
Each of the following constraints specifies an illegal physical site for a
component of type IOB:
Symbol "fosc_j" (LOC=P15)
Please correct the constraints accordingly. |
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