• ARM Cortex-M4 running at up to 120 MHz
• Memory Protection Unit (MPU)
• DSP Instructions, Thumb®-2 instruction set
• 256 Kbytes embedded Flash, ECC, Security Bit and Lock Bits
• 64 Kbytes embedded SRAM
• 16 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
• RTC with Gregorian and Persian Calendar Mode, Waveform Generation in Backup mode
• RTC counter calibration circuitry compensates for 32.768 kHz crystal frequency inaccuracy
• 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
• Slow clock internal RC oscillator as permanent low-power mode device clock
• Two PLL up to 240 MHz for Device Clock and for USB
• Temperature Sensor
• Low-power tamper detection on two inputs, anti-tampering by immediate clear of general-purpose backup registers (GPBR)
• 22 Peripheral DMA Controllers
• Sleep, Wait and Backup modes; consumption down to 1 µA in Backup mode
• 48-lead LQFP, 7 x 7 mm, pitch 0.5 mm
• 48-lead QFN, 7 x 7 mm, pitch 0.5 mm
• Revision A - Industrial (-40° C to +85° C), Revision B -(-40° C to +105° C)
• USB 2.0 Device: 12 Mbps, 2668 byte FIFO, up to 8 bidirectional Endpoints, on-chip transceiver
• Up to two USARTs with ISO7816, IrDA®, RS-485, SPI, Manchester and Modem Mode
• Two 2-wire UARTs
• Up to two 2-Wire Interface modules (I2C-compatible), one SPI, one Serial Synchronous Controller (I2S)
• Two 3-channel 16-bit Timer Counters with capture, waveform, compare and PWM mode, Quadrature decoder logic and 2-bit Gray up/down counter for stepper motor
• 4-channel 16-bit PWM with complementary output, fault input, 12-bit dead time generator counter for motor control
• 32-bit Real-time Timer and RTC with calendar, alarm and 32 kHz trimming features
• 256-bit General Purpose Backup Registers (GPBR)
• 32-bit Cyclic Redundancy Check Calculation Unit (CRCCU) for data integrity check of off-/on-chip memories
• 34 I/O Lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die series resistor termination
• Three 32-bit Parallel Input/Output Controllers, Peripheral DMA-assisted Parallel Capture mode
• 8-channel, 1Msps ADC with differential input mode and programmable gain stage and auto calibration
• 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

Microchip's ARM®-based SAM4S4A microcontroller builds on the high-performance 32-bit Cortex®-M4 core.

The SAM4S4A features:

• Maximum operating speed of 120MHz
• 256KB of flash memory and 64KB of SRAM
• 1.62V to 3.6V supply
• Power consumption of 180uA/MHz in dynamic mode, below 25uA in RAM retention mode and 1uA at 1.8V in back-up mode with the RTC running
• Extensive peripheral set for connectivity, system control and analog interfacing
• Native support for Microchip QTouch?? capacitive touch technology for implementation of buttons, sliders and wheels
• Pin-to-pin compatible with Microchip SAM7S, SAM3N, SAM4N and SAM3S MCUs
• Parallel Input/Output (IO) data capture mode