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AM5728: AM5728 RTC 管脚请教

Part Number: AM5728

1. wakeup0~wakeup3, RTC external wakeup input,  RTC外部唤醒输入,字面理解哈,我是否可以悬空?

2.RTC 里面的ON_OFF管脚,POWER ENABLE OUTPUT PIN, 我如果不需要检测这个信号,是悬空还是上拉下拉?

3.有没有文档,对整个芯片的管脚,假如不用的话,是上拉下来还是悬空,做个说明的?