I read the datasheet as:

1st)send 2 bytes config data ,get unsure result(first time)
after 1st)send 2 bytes config data ,get result from previous config


SDIN configure info valid from rising edge of 1st SCLK (so config data di15 should be on SDIN before SCLK rises)

data should be valid after 7th SCLK rise D09 bit.. (presuming bit bashed)