Hi，

端口引脚的INPUT_PULLUP意味着"内部拉上开放的drain"或不是?“上拉式明渠”电路图像如下图所示:http://cfile6.uf.tistory.com/original/2249FB42558E3DDF351CD1(在此图像中，上拉电阻是外部的)

如果DA14580端口引脚的INPUT_PULLUP是"内部上拉开放排水管"，我如何"驱动低"?
“低驾驶”意味着在上图中切换到地面。< / p > < / div > < / div > < / div > < div class =”字段field-name-field-forum-keywords field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >关键词:,< / div > < div class = "字段条目" > < div class =”field-item甚至“> < a href = " / resource-keywords /排水明沟”“=“skos:概念”属性=“rdfs: label skos: prefLabel”数据类型= " " >开放排水< / > < / div > < div class = " field-item古怪”> < a href = " / resource-keywords / inputpullup”“=“skos:概念”属性=“rdfs: label skos: prefLabel”数据类型= " " > INPUT_PULLUP < / > < / div > < / div > < / div > < div class =”字段field-name-field-device field-type-taxonomy-term-reference field-label-above”> < div class = "字段标签" >设备:< / div > < divclass="field-items">