AFE5832: SENo is float

Part Number: AFE5832

SENo悬空了,这个引脚的默认电平是高吗?手册里面说的Serial programming interface enable pin for VCAo die (the VCA die corresponding to odd numbered inputs), activelow, (VCAo die)150-kΩ pullup. Rail reference = AVDD_1P9.这个上拉是内部实现的吗?