Atom X1, World's Smallest Arduino
Arduino Developers
The Atom X1 from Nerdonic is a tiny 32-bit microcontroller compatible with arduino and breadboard development. It's not just small (14.9mm2 at 0.95 grams), it's powerful too running at 48MHz clock with 256KB ROM, 32KB RAM and 8 pins filled with functionality. The Atom X1 is fully compatible with Arduino IDE and comes with the Arduino Zero bootloader pre-flashed.
Specifications
Microcontroller = Cortex M0+ SAMD21
Bootloader = Arduino Zero Bootloader
Input Voltage Power Pin 1 = 3.3-20v
Input Voltage Power Pin 2 = 3.3vMM
MicroUSB= 5v (Regulated to 3.3v)
Current Draw Atom X1 = ~10mA
Clock = 48MHz
Flash Memory (ROM) = 256KB
SRAM = 32KB
I/O Pin Limits = 3.3v, 7mA
Digital I/O Pins = 8
PWM Pins = 8
Analog (ADC) Pins = 6
Serial (RX/TX) Pins = 2 (1x RX / 1x TX)
I2C (SDA/SCL)Pins = 2 (1x SDA/1xSCL)
Reset Pins = 1
Other versions of the Atom are planned and the circuits have been designed, for example a slightly larger version featuring 20 I/O pins, a full and an even smaller version of the Atom X1 using mini pin headers (1.27mm pitch), although not standard breadboard compatible, it can be used in projects that space is critical.
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