There are no defined sequencing requirements for DVDDIO, DVDD, AVDD, and PVDD on the MAX9867.
However, as a general practice we suggest the following:
1. Enable the DVDD in order to guarantee and establish communication with the codec.
2. Then Enable the DVDDIO to get the digital audio system ready.
3. Enable the AVDD to power the analog circuit sources, such as MICBIAS.
4. And lastly PVDD to enable the codec's output.
This sequence will help prevent any unwanted pops or clicks at the output, which may cause discomfort to the end user.
Use the sequence backward when powering down the system.