Datasheet

Port Pin Alternate Functions
PA5
ADC5 (ADC input channel 5)
PCINT5 (Pin Change Interrupt 5)
PA4
ADC4 (ADC input channel 4)
PCINT4 (Pin Change Interrupt 4)
PA3
ADC3 (ADC input channel 3)
PCINT3 (Pin Change Interrupt 3)
PA2
ADC2 (ADC input channel 2)
PCINT2 (Pin Change Interrupt 2)
PA1
ADC1 (ADC input channel 1)
PCINT1 (Pin Change Interrupt 1)
PA0
ADC0 (ADC input channel 0)
PCINT0 (Pin Change Interrupt 0)
The alternate pin configuration is as follows:
• ADC[7:0]/PCINT[7:0] – Port A, Bit [7:0]
– ADC[7:0]: Analog to Digital Converter Channels [7:0].
– PCINT[7:0]: Pin Change Interrupt source [7:0]. The PA[7:0] pins can serve as external
interrupt sources.
Table 15-4. Overriding Signals for Alternate Functions in PA7...PA4
Signal
Name
PA7/ADC7/ PCINT7 PA6/ADC6/ PCINT6 PA5/ADC5/ PCINT5 PA4/ADC4/ PCINT4
PUOE 0 0 0 0
PUOV 0 0 0 0
DDOE 0 0 0 0
DDOV 0 0 0 0
PVOE 0 0 0 0
PVOV 0 0 0 0
DIEOE PCINT7 • PCIE0 +
ADC7D
PCINT6 • PCIE0 +
ADC6D
PCINT5 • PCIE0 +
ADC5D
PCINT4 • PCIE0 +
ADC4D
DIEOV PCINT7 • PCIE0 PCINT6 • PCIE0 PCINT5 • PCIE0 PCINT4 • PCIE0
DI PCINT7 INPUT PCINT6 INPUT PCINT5 INPUT PCINT4 INPUT
AIO ADC7 INPUT ADC6 INPUT ADC5 INPUT ADC4 INPUT
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
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