1 Configuration Summary
Table 1-1 shows the difference between SAM L22, SAM L21, and SAM D21 features. For more details, refer to the datasheet of the respective products.
| Features | SAM L22N | SAM L22J | SAM L22G | SAM L21J | SAM L21G | SAM L21E | SAM D21J | SAM D21G | SAM D21E |
|---|---|---|---|---|---|---|---|---|---|
| Pins | 100 | 64 | 48 | 64 | 48 | 32 | 64 | 48 | 32 |
| GPIO(s) | 82 | 50 | 36 | 51 | 37 | 25 | 52 | 26 | 26 |
| Flash | 256/128/64KB | 256/128/64KB | 256/128/64KB | 256/128/64KB | 256/128/64KB | 256/128/64/32KB | 256/128/64/32KB | 256/128/64/32KB | 256/128/64/32KB |
| Flash RWW section | 8/4/2KB | 8/4/2KB | 8/4/2KB | 8/4/2KB | 8/4/2KB | 8/4/2/1KB | 2KB/ 1KB in 32KB and 64KB Flash variants | 2KB/ 1KB in 32KB and 64KB Flash variants | 2KB/ 1KB in 32KB and 64KB Flash variants |
| System SRAM | 32/16/8KB | 32/16/8KB | 32/16/8KB | 32/16/8KB | 32/16/8KB | 32/16/8/4KB | 32/16/8/4KB | 32/16/8/4KB | 32/16/8/4KB |
| Low Power SRAM | - | - | - | 8/8/4KB | 8/8/4KB | 8/8/4/2KB | - | - | - |
| Segment LCD (SLCD) Pins | 48 | 31 | 23 | - | - | - | - | - | - |
| Timer Counter (TC) | 4 | 4 | 4 | 5 | 3 | 3 | 5 | 3 | 3 |
| Timer Counter for Control (TCC) | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | 3 |
| DMA channels | 16 | 16 | 16 | 16 | 16 | 16 | 12 | 12 | 12 |
| USB interface | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| AES engine | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - |
| Configurable Custom Logic (CCL) (LUTs) | 4 | 4 | 4 | 4 | 4 | 4 | - | - | - |
| True Random Generator (TRNG) | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - |
| SERCOM | 6 | 4 | 3 | 6 | 6 | 4 | 6 | 6 | 4 |
| ADC channels | 20 | 16 | 10 | 20 | 14 | 10 | 20 | 14 | 10 |
| Analog Comparators | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| DAC Channels | - | - | - | 2 | 2 | 2 | 1 | 1 | 1 |
| Op-Amp | - | - | - | 3 | 3 | 3 | - | - | - |
| Tamper Input Pins | 5 | 3 | 2 | - | - | - | |||
| RTC | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| RTC alarms | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| External Interrupt lines | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| PTC channels for mutual capacitance | 256 (16x16) | 182 (13x14) | 110 (10x11) | 12x16 16x12 | 8x12 12x8 | 6x10 10x6 | 16x16 | 12x10 | 10x6 |
| PTC channels for self capacitance | 24 | 19 | 13 | 16 | 12 | 10 | 16 | 16 | 6 |
| Maximum CPU frequency | 32MHz | 32MHz | 32MHz | 48MHz | 48MHz | 48MHz | 48MHz | 48MHz | 48MHz |
| Packages | TQFP | QFN TQFP | QFN TQFP | QFN TQFP | QFN TQFP | QFN TQFP | QFN TQFP | QFN TQFP | QFN TQFP |
| Event System channels | 8 | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 |
| SW Debug Interface | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| WDT | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |