本帖最后由 nongfuxu 于 2012-1-21 17:03 编辑

用planahead定义好管脚后,MAP时出现以下ERROR信息
Pack:1107 - Pack was unable to combine the symbols listed below into a single IOB component because the site type selected is not compatible. The component type is determined by the types of logic and the properties and configuration of the logic it contains. In this case an IO component of type IOB was chosen because the IO contains symbols and/or properties consistent with output or bi-directional usage and contains no other symbols or properties that require a more specific IO component type. Please double check that the types of logic elements and all of their relevant properties and configuration options are compatible with the physical site type of the constraint.
Summary:
难道带IOB的IO就不能作为普通的OUT端口?
头大了,哪位帮忙解开啊?