Atom X1 Specifications: MCU – Microchip Atmel SAMD21 Cortex M0+ MCU @ 48 MHz with 256KB flash, 32KB
- jpatel
- Dec 6, 2018
- 1 min read

There is a new board in the ecosystem which claims to be the world’s smallest 32-bit Arduino board. The name of it Atom X1 and measures 14.9×14.9 mm.
Atom X1 Specifications:
MCU – Microchip Atmel SAMD21 Cortex M0+ MCU @ 48 MHz with 256KB flash, 32KB SRAMI/Os via 2x 5-pin 2.54mm pitch headersUp to 8x digital I/OUp to 8x PWMUp to 6x analog (ADC)1x UART1x I2C1x resetLimits – 3.7V, 7mAUSB – 1x micro USB portProgramming – via micro USB port or SWD headerMisc – Power LED, user LED, buttonPower Supply3.3-20V (regulated to 3.3v) via power Pin 13.3V via power pin 25V (regulated to 3.3v) via Micro USB portCurrent Draw Atom X1 = ~10mADimensions – 14.9 x 14.9 x 4.4mmWeight – 0.95 grams
The board is breadboard compatible, pre-flashed with Arduino Zero bootloader, and can be programmed in the Arduino IDE just like the original board.
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