Configuration Summary

Table 1 shows the difference between SAM L22, SAM L21, and SAM D21 features. For more details, refer to the datasheet of the respective products.

Table 1. Comparison Between SAM L22, SAM L21, and SAM D21
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