Featuring 52 - TTL compatible digital I/Os shared with 6 - 12-bit A/D channels, you can be up and running in no time. Pin compatible with the Arduino PRO. The BASIC compiler is easy to learn, or the pre-configured C compiler is easy to use. Unleash the power of the ARM Cortex-M3 32 bit processor, running at 100 MHz to solve your control problems. 4 hardware UARTs. Save time with built in support for PWM, SPI, 1-Wire, I2C, Pulse timing, Synchronous and Asynchronous serial protocols. Discounts are available for quantity purchases - please enquire.