Datasheet

Section 20 A/D Converter
Rev. 3.00 Sep. 28, 2009 Page 657 of 910
REJ09B0350-0300
20.2 Input/Output Pins
Table 20.1 summarizes the pins used by the A/D converter.
The AVCC and AVSS pins are the power supply pins for the analog block in the A/D converter.
The AVref pin is a reference voltage pin for the A/D converter. The sixteen analog input pins are
divided into two channel sets: analog input pins 0 to 7 (AN0 to AN7) comprising channel set 0
and analog input pins 8 to 15 (AN8 to AN15) comprising channel set 1.
Table 20.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power supply
pin
AVCC Input Analog block power supply
Analog ground pin AVSS Input Analog block ground
Reference power
supply pin
AVref Input Reference voltage for A/D converter
Analog input pin 0 AN0 Input
Analog input pin 1 AN1 Input
Analog input pin 2 AN2 Input
Analog input pin 3 AN3 Input
Analog input pin 4 AN4 Input
Analog input pin 5 AN5 Input
Analog input pin 6 AN6 Input
Analog input pin 7 AN7 Input
Channel set 0 analog input
Analog input pin 8 AN8 Input
Analog input pin 9 AN9 Input
Analog input pin 10 AN10 Input
Analog input pin 11 AN11 Input
Analog input pin 12 AN12 Input
Analog input pin 13 AN13 Input
Analog input pin 14 AN14 Input
Channel set 1 analog input
Analog input pin 15 AN15 Input