| 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 |
