5V logic with 3.3V compatible inputs can be converted to a 3.3V logic operation 32KB Flash Memory ?? 0.5K for bootloader Four indicator LEDs Easy reprogramming 31.5KB available after bootloading 16MHz Clock Speed
ARM Cortex M4F (with HW floating point acceleration) running at 64MHz 1MB flash and 256KB SRAM Native Open Source USB stack??? pre-programmed with UF2 bootloader Bluetooth Low Energy compatible 2.4GHz radio FCC / IC / TELEC certified module
ATSAME51 32-bit Cortex M4 core with 120 MH 32-bit, 3.3 V logic and power 512 KB Flash, 192 KB RAM 2 MB SPI FLASH chip 3.3V regulator with 500mA peak current output USB Type-C
ATSAMD21G18 @ 48MHz with 3.3V logic/power 256KB of FLASH + 32KB of RAM 32.768 KHz crystal for clock generation & RTC 3.3V regulator with 500mA peak current output Comes with a USB bootloader and serial port debugging
ATSAMD21G18 @ 48MHz with 3.3V logic/power 256KB of FLASH + 32KB of RAM 3.3V regulator with 500mA peak current output USB bootloader and serial port debugging Built-in 100mA lipoly charger with charging status indicator LED
ATSAMD21G18 @ 48MHz with 3.3V logic/power 256KB of FLASH + 32KB of RAM 3.3V regulator with 500mA peak current output USB bootloader and serial port debugging Built-in 100mA lipoly charger with charging status indicator LED
Model: Adafruit Feather 32u4 Bluefruit LE Light as a (large?) feather ?? 5.7 grams ATmega32u4 @ 8MHz with 3.3V logic/power 3.3V regulator with 500mA peak current output
ATmega328p @ 8MHz with 3.3V logic/power 3.3V regulator with 500mA peak current output USB serial converter (CP2104) USB bootloader and serial port debugging Hardware I2C, hardware SPI support
