ISE MAP warning
时间：10-02
整理：3721RD
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碰到一处warning，不知道怎么解决了、求助、、、
WARNINGack:1543 - The register fdce_gen[11].FDCE_inst has the property IOB=TRUE, but was not packed into the input side of an I/O component. The site IFF1 contains register fdce_gen[5].FDCE_inst. The site IFF2 contains register fdce_gen[6].FDCE_inst.
WARNINGack:1543 - The register fdce_gen[11].FDCE_inst has the property IOB=TRUE, but was not packed into the input side of an I/O component. The site IFF1 contains register fdce_gen[5].FDCE_inst. The site IFF2 contains register fdce_gen[6].FDCE_inst.
WARNINGack:1543 - The register fdce_gen[39].FDCE_inst has the property
IOB=TRUE, but was not packed into the input side of an I/O component. The
site IFF1 contains register fdce_gen[5].FDCE_inst.