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Status: Samples Available


  • ARM Cortex-M3 revision 2.0 running at up to 84 MHz
  • No Single Event Latch-Up Below an LET Threshold of 62 MeV.cm2 /mg @ 105°C
  • Total Ionizing Dose of 30 krad(Si)
  • CQFP144, 144-lead CQFP, 22 x 22mm, pitch 0.5 mm
  • LQFP144, 144-lead LQFP, 20 x 20mm, pitch 0.5 mm
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Device Overview


The SAM3X8ERT is the radiation tolerant version of the popular Microchip SAM3X8E high-performance 32-bit ARM Cortex-M3 processor. The SAM3X8ERT runs at 84MHz and features 512KB of flash memory in 2 x 256KB banks and 100KB of SRAM in 64KB +32KB banks, with an additional 4KB as NFC (NAND Flash controller) SRAM.

Its highly-integrated peripheral set for connectivity and communication includes Ethernet, dual CAN, High Speed USB MiniHost and device with on-chip PHY, high-speed SD/SDIO/MMC, and multiple USARTs, SPIs, TWIs (I2C), and one I2S. The SAM3X8ERT also features a 12-bit ADC/DAC, temperature sensor, 32-bit timers, PWM timer and RTC. The 16-bit external bus interface supports SRAM, PSRAM, NOR and NAND Flash with error code correction.

This space-qualified version of the product adds:  Ceramic & Hermetic packages, extended temperature range -40°C to 105°C, extended qualification flow equivalent to QML-V or QML-Q space grade.  Radiation performance for the SAM3X8ERT:  SEL LET > 62 MeV.cm2/mg (at 105°C), and TID up to 30 Krad (Si).

Additional Features
  • Core
    • ARM Cortex-M3 revision 2.0 running at up to 84 MHz
    • Memory Protection Unit (MPU)
    • 24-bit SysTick Counter
    • Thumb®-2 instruction set
    • Nested Vector Interrupt Controller
  • Memories
    • 2 x 256Kbytes embedded Flash, 128-bit wide access, memory accelerator, dual bank
    • 100(64+32) Kbytes embedded SRAM with dual banks
    • 16 Kbytes ROM with embedded bootloader routines (UART, USB) and IAP routines
    • Static Memory Controller (SMC): SRAM, NOR, NAND support.
    • NAND Flash controller with 4 Kbytes RAM buffer and ECC
    • External Bus Interface - 16 bits, 8 chip selects, 23-bit address
  • System
    • Embedded voltage regulator for single-supply operation
    • POR, BOD and Watchdog for safe reset
    • Quartz or resonator oscillators: 3 to 20 MHz main and optional low power 32.768 kHz for RTC or device clock
    • High precision 8/12 MHz factory trimmed internal RC oscillator with 4 MHz Default Frequency for fast device startup
    • Slow Clock Internal RC oscillator as permanent clock for device clock in low power mode
    • One PLL for device clock and one dedicated PLL for USB 2.0 High Speed Mini Host/Device
    • Temperature Sensor
    • 17 peripheral DMA (PDC) channels and 6-channel central DMA plus dedicated DMA for High-Speed USB Mini Host/Device and Ethernet MAC
    • Low Power modes
    • Sleep, Wait and Backup modes, down to 2.5 μA in Backup mode with RTC, RTT, and GPBR
  • Peripheral Features
    • USB 2.0 Device/Mini Host: 480 Mbps, 4 Kbyte FIFO, up to 10 bidirectional Endpoints, dedicated DMA
    • 4 USARTs (ISO7816, IrDA®, Flow Control, SPI, Manchester and LIN support) and one UART
    • 2 TWI (I2C compatible), up to 6 SPIs, 1 SSC (I2S), 1 HSMCI (SDIO/SD/MMC) with up to 2 slots
    • 9-channel 32-bit Timer Counter (TC) for capture, compare and PWM mode, Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for Stepper Motor
    • 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)
    • Ethernet MAC 10/100 (EMAC - MII/RMII) with dedicated DMA
    • 2 CAN Controllers with 8 Mailboxes
    • True Random Number Generator (TRNG)
  • I/O
    • 103 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and on-die Series Resistor Termination
    • Six 32-bit Parallel Input/Output Controllers
  • Analog Features
    • 16-channel 12-bit 1 msps ADC with differential input mode and programmable gain stage
    • 2-channel 12-bit 1 msps DAC
  • Debugger Development Support
    • 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.
  • Integrated Software Libraries and Tools
    • 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
  • Temperature operating range
    • -40°C to +105°C
  • Radiation Performances
    • No Single Event Latch-Up Below an LET Threshold of 62 MeV.cm2 /mg @ 105°C
    • Total Ionizing Dose of 30 krad(Si)
  • Packages
    • CQFP144, 144-lead CQFP, 22 x 22mm, pitch 0.5 mm
    • LQFP144, 144-lead LQFP, 20 x 20mm, pitch 0.5 mm


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Development Environment

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  • Demo & Evaluation Boards
Integrated Development Environments
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Atmel-ICE supports:

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