The Atmel SAM4S Xplained Pro Starter Kit shown in Figure 1.5a is com-posed of the SAM4S board (the main board), and three more daughter boards: IO1, OLED1, and PROTO1. The SAM4S board uses an AtmelATSAM4SD32C MCU for processing. This MCU has 160 KB of SRAM as main memory, 2 KB of cache, an ARM Cortex-M4 as processor, and a max clock frequency of 120 Mhz.
