Microchip Technology SAM3X ARM® Cortex®-M3 Flash-Based Microcontrollers

Microchip Technology SAM3X ARM® Cortex®-M3 Flash-Based Microcontrollers bring more connectivity by adding Ethernet, dual CAN, and high-speed USB (HS USB) MiniHost and device with an on-chip physical layer (PHY). These devices feature a dual-bank configuration of 256kb and 512kb Flash total and are available in 100-pin and 144-pin QFP and BGA package options. The architecture is designed to support high-speed data transfers and includes a multi-layer bus matrix plus dual SRAM banks, direct memory access (DMA) channels, and a peripheral DMA controller (PDC) for applications supporting multi-task operations. Microchip Technology SAM3X ARM® Cortex®-M3 Flash-Based Microcontrollers are ideal for networking applications in the embedded industrial market and home and building automation, smart grids, and industrial automation.


  • ARM® Cortex®-M3 revision 2.0 Core running at up to 84MHz
  • Memories
    • 16kb ROM with embedded bootloader routines (UART, USB) and IAP routines
    • Static Memory Controller (SMC): SRAM, NOR, NAND support. NAND Flash controller with 4kb RAM buffer and ECC
    • SDRAM Controller
  • System
    • Embedded voltage regulator for single-supply operation
    • POR, BOD, and Watchdog for safe reset
    • Quartz or ceramic resonator oscillators: 3MHz to 20MHz main and optional low power 32.768kHz for RTC or device clock
    • High precision 8MHz/12MHz factory trimmed internal RC oscillator with 4MHz 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
    • Up to 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 and Backup modes, down to 2.5μA in Backup mode
    • VDDBU pin, RTC, eight 32-bit backup registers backup domain
    • Ultra Low-power RTC
  • Peripherals
    • USB 2.0 Device/Mini Host: 480Mbps, 4kb FIFO, up to 10 bidirectional Endpoints, dedicated DMA
    • Up to 8-channel 16-bit PWM (PWMC) with Complementary Output, Fault Input, 12-bit Dead Time Generator Counter for Motor Control
    • One Ethernet MAC 10/100 (EMAC) with dedicated DMA
    • Two CAN Controller with eight Mailboxes
    • One True Random Number Generator (TRNG)
Published: 2019-02-15 | Updated: 2023-05-17