Teensy

https://www.pjrc.com/teensy/

https://www.pjrc.com/teensy/teensy31.html

Processor MK20DX256VLH7

Core Cortex-M4

Rated Speed 72 MHz

Overclockable 96 MHz

Flash Memory 256 kbytes

Bandwidth 192 Mbytes/sec

Cache 256 Bytes

RAM 64 kbytes

EEPROM 2 kbytes

Direct Memory Access 16 Channels

Digital I/O 34 Pins

Voltage Output 3.3V Volts

Voltage Input 5V Tolerant Volts

Analog Input 21 Pins

Converters 2

Resolution 16 Bits

Usable 13 Bits

Prog Gain Amp 2

Touch Sensing 12 Pins

Comparators 3

Analog Output 1 Pins

DAC Resolution 12 Bits

Timers 12 Total Pins

FTM Type 3

PWM Outputs 12

PDB Type 1

CMT (infrared) Type 1

LPTMR Type 1

PIT (interval) Type 4

Systick 1

RTC (date/time) ** 1

Communication

USB 1

Serial 3

With FIFOs 2

High Res Baud 3

Fast Clock 2

SPI 1

With FIFOs 1

I2C 2

CAN Bus 1

I2S Audio 1

FIFO Size 8