• 256K Flash Memory, 64K RAM, 2K EEPROM

• 21 High Resolution Analog Inputs (13 bits usable, 16 bit hardware)

• 34 Digital I/O Pins (5V tolerance on Digital Inputs)

• 12 PWM outputs

• 7 Timers for intervals/delays, separate from PWM

• USB with dedicated DMA memory transfers

• 3 UARTs (serial ports)

• SPI, I2C, I2S,CAN Bus, IR modulator

• I2S (for high quality audio interface)

• Real Time Clock (with user-added 32.768 crystal and battery)

• 16 DMA channels (separate from USB)

• Touch Sensor Inputs

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10/22/2015

https://www.sparkfun.com/products/13736