
| Microcontroller | ATSAMD21G18, 48pins LQFP |
| Operating Voltage | 3.3V |
| Digital I / O Pins | 14, with 12 PWM and UART |
| Analog input pins | 6, including 5 12bits ADC channels and one 10 bits DAC |
| DC Current per I / O Pin | 7 mA |
| Flash memory | 256 KB |
| Sram | 32 KB |
| Eeprom | up to 16KB by emulation |
| Clock speed | 48 MHz |
Source: https://habr.com/ru/post/223079/
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