Teensy

Details:-

1. 32 bit ARM Cortex-M4 72 MHz CPU (M4 = DSP extensions)
2. 256K Flash Memory, 64K RAM, 2K EEPROM
3. 21 High-Resolution Analog Inputs (13 bits usable, 16-bit hardware)
4. 1x 12 bit DAC Analog output
5. 34 Digital I/O Pins (16 shared with analog)
6. 12 PWM outputs
7. 7 Timers for intervals/delays, separate from PWM
8. USB with dedicated DMA memory transfers
9. 3 UARTs (serial ports)
10. SPI, 2x I2C, I2S, IR modulator
11. I2S (for the high-quality audio interface)
12. CAN Bus
13. Real Time Clock (with user-added 32.768 crystal and battery)