| Max. frequency (MHz) |
20 |
20 |
20 |
20 |
| 16-bit Timer/Counter type A (TCA) |
1 |
1 |
1 |
1 |
| 16-bit Timer/Counter type B (TCB) |
3 |
3 |
4 |
4 |
| 12-bit Timer/Counter type D (TCD) |
- |
- |
- |
- |
| Real-Time Counter (RTC) |
1 |
1 |
1 |
1 |
| USART |
3 |
3 |
4 |
4 |
| SPI |
1 |
1 |
1 |
1 |
| TWI (I2C) |
1(1) |
1(1) |
1(1) |
1(1) |
| ADC (channels) |
1 (8) |
1 (12) |
1 (16) |
1 (16) |
| DAC (outputs) |
- |
- |
- |
- |
| AC (inputs) |
1 (4p/3n) |
1 (4p/3n) |
1 (4p/3n) |
1 (4p/3n) |
| Peripheral Touch Controller (PTC) (self-cap/mutual cap
channels) |
- |
- |
- |
- |
| Custom Logic (LUTs) |
1 (4) |
1 (4) |
1 (4) |
1 (4) |
| Window Watchdog |
1 |
1 |
1 |
1 |
| Event System channels |
6 |
6 |
8 |
8 |
| General purpose I/O |
23 |
27 |
33 |
41 |
| PORT |
PA[0:7], PC[0:3], PD[0:7], PF[0,1,6] |
PA[0:7], PC[0:3], PD[0:7], PF[0:6] |
PA[0:7], PC[0:5], PD[0:7], PE[0:3], PF[0:6] |
PA[0:7], PB[0:5], PC[0:7], PD[0:7], PE[0:3],
PF[0:6] |
| Asynchronous external interrupts |
6 |
7 |
8 |
10 |
| CRCSCAN |
1 |
1 |
1 |
1 |
| Unified Program and Debug Interface (UPDI) activated by
dedicated pin |
1 |
1 |
1 |
1 |