According to the data manual Section 5.4 Recommended Operating Conditions, only VDD_CPU supports AVS. Furthermore there appears to be only a single operating point (OPP) supported. The DM mentions to look at the VTM_DEVINFO_VDn registers in the TRM. (Side note, the name is slightly different in the TRM, it is WKUP_VTM_VD_DEVINFO_j.)
Looking at the TRM, I don't understand the register mapping. The TRM mentions that the AVS voltage is programmed in the WKUP_VTM_VD_OPPVID_j register. It looks to me like we need to use both of these registers:
- WKUP_VTM_VD_DEVINFO_j
- WKUP_VTM_VD_OPPVID_j
There 8 instances of each of these two registers, i.e. j=0 to 7. Furthermore, the WKUP_VTM_VD_OPPVID_j register contains 4 bitfields: OPP_0/1/2/3.
Which rails map to which registers, and which of the 4 OPP's maps to the single OPP mentioned in the DM?
