15.1.3 Input Pins
Table 15-1 summarizes the A/D converter’s input pins. The eight analog input pins are divided
into two groups: group 0 (AN
0
to AN
3
), and group 1 (AN
4
to AN
7
). AV
CC
and AV
SS
are the
power supply for the analog circuits in the A/D converter. V
REF
is the A/D conversion reference
voltage.
Table 15-1 A/D Converter Pins
Abbrevi-
Pin Name
ation
I/O
Function
Analog power supply pin
AV
CC
Input
Analog power supply
Analog ground pin
AV
SS
Input
Analog ground and reference voltage
Reference voltage pin
V
REF
Input
Analog reference voltage
Analog input pin 0
AN
0
Input
Group 0 analog inputs
Analog input pin 1
AN
1
Input
Analog input pin 2
AN
2
Input
Analog input pin 3
AN
3
Input
Analog input pin 4
AN
4
Input
Group 1 analog inputs
Analog input pin 5
AN
5
Input
Analog input pin 6
AN
6
Input
Analog input pin 7
AN
7
Input
A/D external trigger input pin
ADTRG
Input
External trigger input for starting A/D conversion
525
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