Does ADAU1701 have a watchdog? How do you recover from a crash?
I'm working on a project with a fellow engineer who won't build anything without a watchdog timer. So he has his PIC microcontroller looking for a 1 Hz oscillator programmed in our ADAU1701, routed to a GPIO pin. If the PIC doesn't see it and times out, it resets both itself and the -1701.