IP2022 User’s Manual—Peripherals www.ubicom.com 295 Figure 4-13  Analog-to-Digital Converter Block Diagram The   RG1  and   RG2   port   pins   are   also   used   as   the   analog
comparator input pins. The result of sampling the RG1 or RG2
pins will be correct whether or not the comparator is operating.
The  RG0  pin  is  also  used  as  the  comparator  output  pin.  If  the
comparator is enabled, then sampling the RG0 pin will indicate the
voltage  level  being  driven  by  the  comparator.  The  RG3  pin  is
multiplexed with the external reference voltage. 515-016.eps ADCH A/D Vref
Reference
Voltage ADCREF ADC Timer 8 7 0 ADCGO 10 ADCL 8 7 0 AVdd RG7:0 System Clock ADCS2:0 RG3 Data Bus    Data Bus