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Rev. 5.00, 09/03, page 615 of 760
20.1.3 Input Pins
Table 20.1 summarizes the A/D converter’s input pins. The eight analog input pins are divided
into two groups: group 0 (AN0 to AN3), and group 1 (AN4 to AN7). AV
CC
and AV
SS
are the
power supply inputs for the analog circuits in the A/D converter. AVcc also functions as the A/D
converter reference voltage pin.
Table 20.1 A/D Converter Pins
Pin Name Abbreviation I/O Function
Analog power supply pin AVcc Input Analog power supply
Analog ground pin AVss Input Analog ground and reference voltage
Analog input pin 0 AN0 Input Group 0 analog inputs
Analog input pin 1 AN1 Input
Analog input pin 2 AN2 Input
Analog input pin 3 AN3 Input
Analog input pin 4 AN4 Input Group1 analog inputs
Analog input pin 5 AN5 Input
Analog input pin 6 AN6 Input
Analog input pin 7 AN7 Input
A/D external trigger input
pin
ADTRG Input External trigger input for starting A/D
conversion