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ARM MCU, SAM32 Family SAM 3A Series Microcontrollers, ARM Cortex-M3, 32bit, 84 MHz, 256 KB, 64 KB


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SAM32 Family SAM 3A Series Microcontrollers
Technical Datasheet:
ATSAM3A4CA-AU   Datasheet
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Product Range Selector (SAM32 Family SAM 3A Series Microcontrollers)

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Product Overview

The ATSAM3A4CA-AU is a SMART SAM3X/A series 32-bit Flash Microcontroller based on the high-performance ARM Cortex-M3 RISC processor. It operates at a maximum speed of 84MHz and features 256kB of flash memory in 2 x 128kB banks and 64kB of SRAM in 2 x 32kB banks. Its highly-integrated peripheral set includes 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 SAM3A4C also features a 12-bit ADC/DAC, temperature sensor, 32-bit timers, PWM timer and RTC. It supports the Atmel QTouch® Library for easy implementation of buttons, sliders and wheels. The device operates from 1.62 to 3.6V. It is ready for capacitive touch with QTouch library, offering an easy way to implement buttons, wheels and sliders. The SAM3X/A architecture is specifically designed to sustain high-speed data transfers. It includes a multi-layer bus matrix as well as multiple SRAM banks, PDC and DMA channels.
  • ARM Cortex-M3 revision 2.0 running at up to 84MHz
  • Memory protection unit (MPU)
  • Thumb®-2 instruction set
  • 24-bit SysTick counter
  • Nested vector interrupt controller
  • Embedded voltage regulator for single supply operation
  • Power-on-reset (POR), brown-out detector (BOD) and watchdog for safe reset
  • High precision factory trimmed internal RC oscillator with 4MHz default frequency
  • 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
  • Sleep, wait and backup modes, down to 2.5µA in backup mode with RTC, RTT and GPBR
  • Ethernet MAC 10/100 (EMAC) with dedicated DMA
  • 2 CAN controllers with 8 mailboxes
  • True random number generator (TRNG)
  • Register write protection
  • USB 2.0 device/mini host - 480Mbps, 4kB FIFO, up to 10 bidirectional endpoints, dedicated DMA


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Product Information

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SAM32 Family SAM 3A Series Microcontrollers

ARM Cortex-M3













MSL 3 - 168 hours
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Technical Docs (2)

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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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