Can I use DBVDD +3.3V when DCVDD, AVDD and HPVDD will be connected to 1.8V ? Is
possible to leave HPVDD unconnected if I'm not going to use headphone outputs?
SSM2603 can work at 3.3V for DBVDD and 1.8V for other supplies. And if
Headphone is not used, HPVDD can be left floating.