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PCM1861 INT引脚的功能

Other Parts Discussed in Thread: PCM1861

datasheet中对PCM1861的INT脚(Pin19)的描述有些含糊:“Interrupt Output (for Analog Input Detect). Pull High for Active Mode, Pull Low for Idle.” 按照我的理解,INT脚应该是输出,表示analog输入有没有detect到。可是,在评估版上测试,感觉这个脚是一个输入引脚,是用来控制这个芯片activce或是idle. 

是否有人解释下,INT脚究竟是输出还是输入。我希望是输出,我需要读取到是否有analog audio输入的信息。

或者,输入输出与否还要靠其他什么地方设置?

盼望有人回复解答,不胜感激!