初学CPLD，写了个小代码，但在编译到Fit这一步的时候报错：
ERROR:Cpld:886 - Function block FB1 was too congested to route successfully.
   This occurs due to excessive (>= 50) product term input fanins to this
   function block. Consider moving output signals in this function block to less
   congested function blocks, buffering output signals that must remain in this
   function block, or selecting a larger package.
.ERROR:Cpld:868 - Cannot fit the design into any of the specified devices with
字面意思能看懂是说功能模块FB1太拥挤，建议把输出信号移到其他功能模块。
但是对这个提示不明白，怎么叫移到其他功能模块呢？肯定不是单纯的改变输出的管脚约束吧？
求高手指导！三百六十度大回环转体感谢！！！！ 此帖出自小平头技术问答