The ATSAM3S1AA-AU is a low-power, cost-efficient, 8-bit microcontroller from the Atmel | SMART SAM3S1 series by Microchip. This device is based on the 32-bit ARM Cortex-M3 core. It provides users with a rich set of peripherals, including a two-channel DMA controller, Host/Device and general-purpose full-speed USB, USARTs andconfigurable logic tiles and timers, among other peripherals. In addition, it delivers a fast interrupt processing performance and incorporates a static memory interface with 128KB Flash memory, 12KB SRAM, Flash Programming and secure programming, TrueRandom Number Generator, CRC and Watchdog Timer. The operating temperature range for this device is between -40 and 125°C, with a maximum clock frequency of 75 MHz.