Are you looking for documentation on the ADAU1701? This is what I found http://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1701.pdf. If you would like to set up the ADAU1701 using I2C please read page 24 of the above manual.
With solidThinking Embed, you can then easily set a microcontroller up to send the I2C signals to your ADAU1701 without writing code. This way you can emphasize on setting up your ADAU1701 correctly. Unfortunately Embed doesn't currently support Atmel. I recommend the Texas Instruments Launchpad 28027 or the more powerful 28069