Microchip Technology SAM3S ARM® Cortex®-M3 Flash-Based Microcontrollers

Microchip Technology SAM3S ARM® Cortex®-M3 Flash-Based Microcontrollers family integrates features to simplify system design and reduce power consumption down to 2.3mW at 1MHz, 1.45mW/MHz at 64MHz operation, and 1.6uA in backup mode with the RTC running. Inspired by the best-selling SAM7S series, the SAM3S is the ideal migration path to a more powerful and feature-rich MCU. A renewed peripheral set provides system control, sensor interfaces, an optional external parallel bus interface, connectivity, and user interface support.


  • ARM® Cortex®-M3 revision 2.0 Core running at up to 64MHz
  • Memories
    • 16kb ROM with embedded bootloader routines (UART, USB) and IAP routines
    • 8-bit Static Memory Controller (SMC): SRAM, PSRAM, NOR, and NAND Flash support
    • Memory Protection Unit (MPU)
  • System
    • Embedded voltage regulator for a single supply operation
    • Power-on-Reset (POR), Brown-out Detector (BOD), and Watchdog for safe operation
    • Quartz or ceramic resonator oscillators: 3MHz to 20MHz main power with Failure Detection 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 device startup; In-application trimming access for frequency adjustment
    • Slow Clock Internal RC oscillator as permanent low-power mode device clock
    • Two PLLs up to 130MHz for device clock and for USB
    • Temperature sensor
    • Up to 22 peripheral DMA (PDC) channels
  • Low Power Modes
    • Sleep and Backup modes, down to 3μA in Backup mode
    • Ultra-low-power RTC
  • Peripherals
    • USB 2.0 Device: 12Mbps, 2668-byte FIFO, up to 8 bidirectional Endpoints; On-Chip Transceiver
    • 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 and alarm features
    • One Analog Comparator with flexible input selection, Selectable input hysteresis
    • 32-bit Cyclic Redundancy Check Calculation Unit (CRCCU)
    • Write Protected Registers
Publicado: 2019-02-15 | Actualizado: 2023-05-16