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ARM MCU, SAM4S Series, SAM32 Family SAM 4S Series Microcontrollers, ARM Cortex-M4, 32bit, 120 MHz

The ATSAM4S2BA-AU is a SMART SAM4S series 32-bit Flash Microcontroller based on the high-performance ARM Cortex-M4 RISC Processor. It operates at a maximum speed of 120MHz and features 128kB of flash memory and 64kB of SRAM. The peripheral set includes a full-speed USB device port with embedded transceiver, a high-speed MCI for SDIO/SD/MMC, an External Bus Interface featuring a Static Memory Controller to connect to SRAM, PSRAM, NOR flash, LCD Module and NAND flash, 2 USARTs, 2 UARTs, 2 TWIs, 3 SPIs, an I²S, as well as a PWM timer, two 3-channel general-purpose 16bit timers (with stepper motor and quadrature decoder logic support), an RTC, a 12-bit ADC, a 12-bit DAC, and an analog comparator. The device operates from 1.62V to 3.6V. It is ready for capacitive touch, offering native support for the Atmel QTouch® library for easy implementation of buttons, wheels, and sliders. The real-time event management allows peripherals to receive, react to and send events in active and sleep modes.

  • ARM Cortex-M4 with 2kB of cache running at up to 120MHz
  • Memory protection unit (MPU)
  • DSP instruction set
  • Thumb®-2 instruction set
  • Pin-to-pin compatible with SAM7S, SAM3N, and SAM3S MCUs
  • Embedded voltage regulator for single-supply operation
  • Power-on-reset (POR), brown-out detector (BOD), and watchdog for safe operation
  • 3 to 20MHz resonator oscillators
  • RTC with Gregorian and Persian Calendar mode, waveform generation in low-power modes
  • RTC counter calibration circuitry compensates for 32.768kHz crystal frequency inaccuracy
  • High-precision factory-trimmed internal RC oscillator with 4MHz default frequency
  • Slow clock internal RC oscillator as the permanent low-power mode device clock
  • Two PLLs up to 240MHz for device clock and for USB
  • Temperature sensor
  • Low-power tamper detection on two inputs
  • Sleep, wait, and backup modes
  • 32bit real-time timer and RTC with calendar, alarm, and 32KHz trimming features
  • 256bit general-purpose backup registers (GPBR)
  • One 2-channel 12-bit 1MSPS DAC
  • One analog comparator with flexible input selection, selectable input hysteresis

Technical Doc: ATSAM4S2BA-AU  Datasheet

Additional information

Manufacturer Part No.





Available for back orders


CPU Speed


RoHS Compliant

Embedded Interface Type

Pack Quantity




Product Range

SAM32 Family SAM 4S Series Microcontrollers

No. of Bits

Program Memory Size

RAM Memory Size

No. of Pins

MCU Case Style

No. of I/O's

Supply Voltage Min

Supply Voltage Max

MCU Family

MCU Series


RoHs Phthalates Compliant


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