32-Bit SAM S Microcontrollers Microchip Technology 32-Bit SAM S Microcontrollers are general-purpose Flash MCUs based on an Arm® Cortex®-M7 RISC Processor with a Floating Point Unit (FPU). The SAM S MCUs operate at a maximum speed of 300MHz and feature up to 2048KB of Flash, dual 16KB of cache memory, and up to 384KB of SRAM with Tightly Coupled Memory (TCM) options. The SAM S MCUs offer an extensive peripheral set, including High-Speed USB host and device plus PHY, up to eight UARTs, I2S, SD/MMC interface, a CMOS camera interface, system control, and analog interfaces.