39.5.5 VDD Scaler

The VDD scaler generates a reference voltage that is a fraction of the device’s supply voltage with 64 levels. The programmable VDD scaler (PLVD Scaler) is available for AC_CMP1 only. AC_CMP0 uses a fixed VDD/2 reference. The scaler of a comparator is enabled when the Negative Input Mux bit field or the Positive Input Mux in the respective Comparator Control register (COMPCTRLx.MUXNEG) is set to 0x5 and the comparator is enabled. The voltage of each channel is selected by the Value bit field in the SCALER1 registers (SCALER1.VALUE) using the VDD resistor ladder.