16.3.1 Alternate Functions of Port A
The Port A pins with alternate functions are shown in the table below:
| Port Pin | Alternate Functions |
|---|---|
| PA7 |
ADC7 (ADC input channel 7) |
| PA6 |
ADC6 (ADC input channel 6) |
| PA5 |
ADC5 (ADC input channel 5) |
| PA4 |
ADC4 (ADC input channel 4) |
| PA3 |
ADC3 (ADC input channel 3) |
| PA2 |
ADC2 (ADC input channel 2) |
| PA1 |
ADC1 (ADC input channel 1) |
| PA0 |
ADC0 (ADC input channel 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.
| 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 |
| Signal Name | PA3/ADC3/ PCINT3 | PA2/ADC2/ PCINT2 | PA1/ADC1/ PCINT1 | PA0/ADC0/ PCINT0 |
|---|---|---|---|---|
| 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 | PCINT3 • PCIE0 + ADC3D | PCINT2 • PCIE0 + ADC2D | PCINT1 • PCIE0 + ADC1D | PCINT0 • PCIE0 + ADC0D |
| DIEOV | PCINT3 • PCIE0 | PCINT2 • PCIE0 | PCINT1 • PCIE0 | PCINT0 • PCIE0 |
| DI | PCINT3 INPUT | PCINT2 INPUT | PCINT1 INPUT | PCINT0 INPUT |
| AIO | ADC3 INPUT | ADC2 INPUT | ADC1 INPUT | ADC0 INPUT |