Atmel : Certified SMART SAM W25 Wi-Fi module integrates hardware cryptographic security

The Atmel® SMART SAM W25 is a certified Wi-Fi® module which integrates a 2.4GHz radio, a controller and an authentication chip, making it easy to design high data-rate wireless nodes that have a high level of hardware security.

The SAM W25 is based on Atmel’s low-power WINC1500 2.4GHz IEEE 802.11b/g/n System-on-Chip (SoC), and an ARM® Cortex®-M0+ processor core. The module also includes Atmel’s ATECC108A CryptoAuthentication™ device: this has a cryptography engine which provides extremely secure hardware-based key storage.

The module is ideal for designers who need to implement secure Wi-Fi connectivity, but who have no previous experience with IEEE 802.11 systems, IP stacks or the Wi-Fi radio. It provides an integrated software solution which includes application and security protocols as well as a TCP/IP stack. The hardware security is also easy to implement, so expertise in cryptography and authentication technology is not required. The Wi-Fi SoC and controller are suitable for battery-powered applications: they have an operating voltage range of 2.7V to 3.6V, and draw just 4μA in Deep Sleep mode. The Wi-Fi SoC can turn the radio on and off instantly to enable the use of power-saving modes. In fact, the low-power operation of the SAM W25 module means that Wi-Fi can now be successfully used in products requiring years of battery life.

The ATECC108A chip uses key sizes of 256 or 283 bits, appropriate for modern security environments, while avoiding the long computation delays typical of software solutions. Providing for high-quality random number generation, the ATECC108A ensures that replay attacks, re-transmitting a previously successful transaction, always fail.


  • Wi-Fi data rate up to 72Mbits/s
  • Integrated power amplifier and Transmit/Receive switch
  • WEP and WPA security support
  • 4Mbit Flash memory
  • SPI, UART and I2C interfaces
  • FCC, CE and TELEC certifications


  • Internet of Things
  • Secure, low-power Wi-Fi connectivity


The Atmel SAM W25 Xplained Pro evaluation kit is a hardware platform for evaluation of the SAM W25 series of certified Wi-Fi modules. The kit features a SAMW25H18-MR510PA module and is supported by the Atmel Studio integrated development platform.
Orderable Part Number: ATSAMW25-XPRO