IQAudio Codec Zero - Manual

Is anyone able to help me find a manual for the IQAudio Codec Zero? I have found the IQAudio Product Guide (v32 10-Dec-2020) and have used this to create a basic working configuration. I am now looking for more detail on how to use all the functionality offered by this device (mixers, ALC,ADC Gain Ramping Switch etc) and how this interacts with AlsaMixer.