19.1 Features
- A Subset of the Device I/O Pins Can Be Powered by VDDIO2
 - The VDDIO2 Supply Can Ramp Up and Down Independently of the VDD Supply
 - Single- or Dual-Supply Configuration Determined by Fuse
 - PORT Access and Peripheral Override Independent of the Supply Configuration
 - VDDIO2 Supply Status Bit
 - Interrupt and Event for VDDIO2 Supply Status Change
 - ADC Channel for Measuring VDDIO2 Supply Voltage
 
