Model : Teensy 3.2
Chip Number : MK20DX256

# Features :

32 bit ARM Cortex-M4 72 MHz CPU (M4 = DSP extensions)
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
1.4 x 0.7" (~35 x 18 mm)

Url address : https://www.pjrc.com/store/teensy32.html
              https://www.sparkfun.com/products/13736