2.1 Configuration Summary
| Peripheral | 32-Pin Package | 28-Pin Package | 20-Pin Package |
|---|---|---|---|
| Maximum CPU frequency | 24 MHz | ||
| SysTick timer | 1 | ||
| Serial Wire Debug Interface | Yes | ||
| Oscillators | 32.768 kHz crystal oscillator (XOSC32K) | ||
| 32.768 kHz internal oscillator (OSC32K) | |||
| 24 MHz high-accuracy internal oscillator (OSCHF) | |||
| Generic Clock (GCLK) | 4 | ||
| DMA channels | 2 | ||
| Event System channels | 4 | ||
| I/O Pins(1) | 27/26 | 23/22 | 17/16 |
| External Interrupt lines | 15 and one non-maskable interrupt (NMI) | 13 and one non-maskable interrupt (NMI) | 11 and one non-maskable interrupt (NMI) |
| Serial Communication (SERCOM) Interfaces/of which I2C is supported | 2/1 | 2/1 | 2/1 |
| Timer Counter (TC) | 3 | ||
| Waveform outputs/Capture inputs channels per TC instance | 2 | ||
| TC maximum and minimum capture | Yes | ||
| Timer Counter for Control (TCC)/number of waveform output channels | 1/4 | ||
| Configurable Custom Logic (CCL)/number of LUTs | 1/4 | ||
| Analog-to-Digital Converter (ADC)/channels | 1/20 | 1/16 | 1(11) |
| Analog Comparators - AC | 2 | ||
| Real-Time Counter - RTC | 1 | ||
| RTC alarms | 1 | ||
| RTC compare values | One 32-bit value or two 16-bit values | ||
| Watchdog Timer - WDT | Yes | ||
| CRC32 computation for memories in DMAC | Yes (SRAM, Flash) | ||
| Brown-Out Detection - BOD | VDD, VDDCORE | ||
| Peripheral Touch Controller (PTC)/channels | 1/20 | 1/16 | 1(11) |
Note:
- The PA30/RESET pin is input-only.