Adafruit Metro M0 Express - Designed for CircuitPython - ATSAMD21G18

Key Features: 7-9V polarity protected DC or the micro USB connector to any 5V USB source CircuitPython now comes preloaded ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic Built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip 256K of FLASH (8x more than the Atmega328) and 32K of RAM (16x as much) Metro is our series of microcontroller boards for use with the Arduino IDE. This new Metro M0 Expressboard looks a whole lot like our original Metro 328, but with a huge upgrade. Instead of the ATmega328, this Metro features a ATSAMD21G18 chip, an ARM Cortex M0+. It's our first Metro that is designed for use with CircuitPython! CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, its a small but full-featured version of the popular Python programming language specifically for use with circuitry and electronics.Not only can you use CircuitPython, but the Metro M0 is also usable in the Arduino IDE.At the Metro M0's heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip.Item Specifics2 MB SPI Flash chip32.768 KHz crystal (clock generation/RTC)Output: 3.3V regulator with 500mA peak4 - Indicator LEDs1 - NeoPixelBuilt-in UF2 bootloader and serial port debugging25 GPIO pinsHardware Serial, hardware I2C, hardware SPI supportPWM outputs on almost all pins6 x 12-bit analog inputs1 x 10-bit analog output (DAC)Power on/off switch4 rubber bumpersSize: 2.8" x 2.1"Height (w/ barrel jack): 0.5"Weight: 20g