PCM1753: How to use PCM1753 with default settings

Hi,

According to PCM1753 data sheet, it seems that PCM1753 can be worked with the default settings normally even if the internal registers aren't access using the ML, MC and MD pins, but is my understanding correct?
If yes, can the ML, MC and MD pins be kept floating? For these pins, PCM1753-Q1 has the schmitt-trigger input with internal pull-down. So, could you please confirm just in case?
Additionally, please let me know if you have any concerns.

Best regards,
Kato