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DS90UB927Q-Q1: work mode select and pin question

Part Number: DS90UB927Q-Q1

Hi, Ti team,

    1.MAPSEL/LFMODE/BKWD/REPEAT can through the way of software registers configuration, hardware and not pull/pulldown resistor reserved?

    2.Can unused pins be floating? eg;I2S

    3. Is there a "CMLOUT" pin  for test eye diagram available?