可以连接到不可路由的双向引脚

我配置了PIN作为双向。
现在我得到一个错误，那两个输出驱动同一销虽然有相同的原理一样（当配置为输出）。
什么原语能够连接到这个引脚？
当做
罗伯特



     以下为原文
  I configured the pin as bidirectional.
    Now I get an error, that two outputs drive the same pin although there is the same schematic as before (when configured as output only).
    What primitive is able to connect to this pin?
    regards
    robert