Datasheet

Section 21 A/D Converter
Rev. 3.00 Mar 21, 2006 page 587 of 788
REJ09B0300-0300
21.2 Input/Output Pins
Table 21.1 summarizes the pins used by the A/D converter. The 8 analog input pins are divided
into two groups consisting of four channels. Analog input pins 0 to 3 (AN0 to AN3) comprising
group 0 and analog input pins 4 to 7 (AN4 to AN7) comprising group 1. Expanded A/D
conversion input pins (CIN0 to CIN15) can be selected with the AN6 and AN7 pins. The AVcc
and AVss pins are the power supply pins for the analog block in the A/D converter.
Table 21.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power
supply pin
AV
CC
Input Analog block power supply and reference voltage
Analog ground pin AV
SS
Input Analog block ground and reference voltage
Reference power
supply pin
AVref Input Reference voltage for A/D conversion
Analog input pin 0 AN0 Input
Analog input pin 1 AN1 Input
Analog input pin 2 AN2 Input
Analog input pin 3 AN3 Input
Group 0 analog input pins
Analog input pin 4 AN4 Input
Analog input pin 5 AN5 Input
Analog input pin 6 AN6 Input
Analog input pin 7 AN7 Input
Group 1 analog input pins
A/D external trigger
input pin
ADTRG Input External trigger input pin for starting A/D
conversion
Expanded A/D
conversion input
pins 0 to 15
CIN0 to
CIN15
Input Expanded A/D conversion input (digital input)
channels 0 to 15
Can be used as digital input pins