Atmel – SAMA5D2 : Industry’s lowest-power ARM Cortex-A5-based MPU features high-grade security capabilities


Atmel’s SAMA5D2: ARM Cortex-A5 core runs at 500MHz


Atmel has launched a new series of secure Atmel | SMART ARM® Cortex®-A5- based microprocessors which offer lower power consumption than any other MPU in its class.

The new SAMA5D2 MPUs draw less than 200μA in Retention mode with context preserved and have a fast 30μs wake-up time. In the devices’ new Back-up mode, in which the DDR memory continues to refresh itself, the current is just 50μA.

The SAMA5D2 series provides for a high level of system integration, with the addition of a complete audio sub-system and built-in Payment Card Industry (PCI)-level security in miniature Ball Grid Array (BGA) packages with 196, 256 or 289 pins.

The series is ideal for applications requiring an entry-level MPU and an extended industrial ambient temperature range of -40°C to 105°C. The new devices also provide an excellent upgrade option for designers currently using ARM926-based MPUs, and who require higher performance, low-power operation, higher security, DDR3 support and a smaller footprint, as well as access to audio and USB functionality and Atmel’s patented SleepWalking™ technology.

The robust security system in the new SAMA5D2 MPUs includes the ARM® TrustZone® technology, along with secure boot, hardware cryptography, RSA/ECC capability, on-the-fly encryption/ decryption on DDR and QSPI memories, tamper resistance, memory scrambling, independent watchdog, temperature, voltage and frequency monitoring and a unique ID in each device.

Featuring an ARM NEON™ engine, the new SAMA5D2 series’ ARM Cortex-A5 core runs at an operating frequency of 500MHz, providing throughput of 785DMIPS. Its memory system includes a configurable 16- or 32-bit DDR interface controller, 16-bit External Bus Interface (EBI), QSPI Flash interface, ROM with secure and non-secure boot solution, 128kbytes of SRAM, plus 128kbytes of L2 cache configurable as an SRAM extension.

The user interface system for the SAMA5D2 includes a 24-bit TFT LCD controller, multiple I2S and SSC/TDM channels, a stereo Class D amplifier and digital microphone support.


  • Floating point unit
  • Dual CAN-FD controller
  • 10/100 Ethernet MAC with IEEE 1588
  • Two Hi-speed USB ports
  • One 12-bit image sensor controller with Raw Bayer support
  • Free Linux distribution
  • 40 peripheral drivers encoded in C


  • Industrial IoT equipment
  • Wearable devices
  • Point-of-sale terminals



The SAMA5D2 Xplained Ultra is a fast prototyping and evaluation platform for the SAMA5D2 series of MPUs. The board includes an ATSAMA5D27-CU MPU and eMMC and DDR3 memories, as well as a rich set of connectivity options.

Orderable Part Number: ATSAMA5D2-XULT