I'm very familiar with the ADAU144x. It is easy to slave an output to an input clock domain, or an input to an output clock domain with those Sigmas.
This is very handy for connecting to things like codecs that have data in and out that use the same BCLK and LRCLK.
I'm looking at the ADAU1451 for a project, and I don't seem to see anything that allows for this type of clocking. Am I missing something, or is it not possible without physically connecting the corresponding pins?