For New Designs, we highly recommend to consider Revision B for Prototypes and Production. Microchip's ARM®-based SAM4SD16 microcontroller builds on the high-performance 32-bit Cortex®-M4 core. The SAM4SD16 features: * 2x512KB of flash memory and 160KB of SRAM * 2KB of integrated cache memory * Maximum operating speed of 120MHz * Dual-bank Flash * Best-in-class power consumption: 200uA/MHz in active mode, down to 3uA at 1.8V in back-up mode with the RTC running * 1.62V to 3.6V power supply * Extensive peripheral set for connectivity, system control and analog interfacing * Pin-to-pin compatible with Microchip SAM7S, SAM3N and SAM3S MCUs * Supported by Atmel Studio, Software Framework(ASF) and the SAM4S-EK2