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PCM1862: How are unused analog input pins and digital out XI deal with?

Part Number: PCM1862

Hello expert,

I have same question as follows for PCM1862. 

"Our customer asked about how PCM1862 unused pin deal with. Could you please help him your recommendation how unused analog input pins and digital out XI are deal with e.g. left open,  connect to certain potential like GND."

I understood that those differences between 1861 /1862 for control methods and so on.

So the answer should be here. Is it correct?

"The unused analog input pins should be left unconnected. The oscillator input XI can be grounded and the oscillator output XO should be left floating."