Main FeaturesFreescale Kinetis K20DX128 Microcontroller (K20DX128VFT5)ARM Cortex-M4, 50 MHz, 128 KByte FLASH, 16 kByte RAMUSB, ADC, DMA, FTM, I2S, I2C, PIT, GPIO, UART, TSIO, CMP, DACInternal 5V to 3.3V DC converter (120 mA)Optional Micro SD cardOptional...