Microchip's ATSAM4N16B ARM® Cortex®-M4-based microcontroller runs at 100MHz and features 1MB of flash memory and 80KB of SRAM.

Peripherals include six USARTs, three SPIs and three I²Cs for fast serial communication, as well as a 10-channel 12-bit ADC, a 10-bit DAC, PWM, timers and RTC.

The device operates from 1.62V to 3.6 V and is available in 64-pin QFP and QFN packages

Pin-to-pin compatible with SAM3N, SAM3S products (48/64/100-pin versions), SAM4S (64/100-pin versions) and SAM7S legacy products (64-pin version).

• ARM Cortex-M4 running at up to 100 MHz
• Memory Protection Unit (MPU)
• DSP Instructions, Thumb®-2 instruction set
• 1024 Kbytes embedded Flash
• 80 Kbytes embedded SRAM
• 8 Kbytes ROM with embedded boot loader routines (UART, USB) and IAP routines
• Embedded voltage regulator for single-supply operation
• Power-on-Reset (POR), Brown-out Detector (BOD) and Dual Watchdog for Safe Operation
• Quartz or ceramic resonator oscillators: 3 to 20 MHz with clock failure detection and 32.768 kHz for RTT or system clock
• Slow clock internal RC oscillator as permanent low-power mode device clock
• High-precision 8/12 MHz factory-trimmed internal RC oscillator with 4 MHz default frequency for device startup, in-application trimming access for frequency adjustment
• PLL up to 240 MHz for Device Clock
• Temperature Sensor
• Low-power tamper detection on two inputs, anti-tampering by immediate clear of general-purpose backup registers (GPBR)
• 23 Peripheral DMA Controllers
• Sleep, Wait, and Backup modes, down to 0.7 μA in Backup mode with RTC, RTT, and GPBR
• 64-lead LQFP, 14 x 14 mm, pitch 0.5 mm
• 64-lead QFN, 9 x 9 mm, pitch 0.5 mm
• Industrial (-40° C to +85° C)
• Up to 2 USARTs with ISO7816, IrDA (only USART0), RS-485, and SPI Mode
• Up to 4 two-wire UARTs
• Up to 3 Two-wire Interfaces (TWI)
• 1 SPI
• 2 Three-channel 16-bit Timer Counter blocks with capture, waveform, compare and PWM mode, Quadrature Decoder Logic and 2-bit Gray Up/Down for Stepper Motor
• 1 Four-channel 16-bit PWM
• 32-bit low-power Real-time Timer (RTT) and low-power Real-time Clock (RTC) with calendar and alarm features
• 256-bit General Purpose Backup Registers (GPBR)
• 47 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die Series Resistor Termination.  Individually Programmable Open-drain, Pull-up and Pull-down resistor and Synchronous Output
• Three 32-bit Parallel Input/Output Controllers, Peripheral DMA-assisted Parallel Capture mode
• One 10-bit ADC up to 510 ksps, with Digital Averaging Function providing Enhanced Resolution Mode up to 12-bit, up to 16-channels
• One 10-bit DAC up to 1 msps Internal voltage reference, 3V typ
• Serial Wire/JTAG Debug Port(SWJ-DP)
• Debug access to all memories and registers in the system, including Cortex-M4 register bank when the core is running, halted, or held in reset.
• Serial Wire Debug Port (SW-DP) and Serial Wire JTAG Debug Port (SWJ-DP) debug access.
• Flash Patch and Breakpoint (FPB) unit for implementing breakpoints and code patches.
• Data Watchpoint and Trace (DWT) unit for implementing watchpoints, data tracing, and system profiling.
• Instrumentation Trace Macrocell (ITM) for support of printf style debugging.
• IEEE1149.1 JTAG Boundary-scan on all digital pins.
• ASF-Atmel software Framework – SAM software development framework
• Integrated in the Atmel Studio IDE with a graphical user interface or available as standalone for GCC, IAR compilers.
• DMA support, Interrupt handlers Driver support
• USB, TCP/IP, Wi-Fi and Bluetooth, Numerous USB classes, DHCP and Wi-Fi encryption Stacks
• RTOS integration, FreeRTOS is a core component