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TDA4VH-Q1: some questions about AVS

Part Number: TDA4VH-Q1

Hi,We use TDA4VH, some questions about AVS, please help answer, thank you~
1. How to enable AVS and how to operate AVS?
2. How to read the value of the VTM_VTM_VD_DEVINFO_2 and VTM_VTM_VD_OPPVID_2 registers mentioned in the manual, please provide a detailed description of the register.
3. Whether it can be set according to the default 0.8V.