SparkFun MicroMod STM32WB5MMG Processor

SparkFun MicroMod STM32WB5MMG Processor offers a powerful M.2-connectable processor with computing and wireless capabilities. This SparkFun processor, based on STMicroelectronics' STM32WB5MMG, features an ultra-low power microcontroller with an Arm® Cortex®-M4 processor for primary computing, including FPU and ART support, and an Arm Cortex-M0 processor for running the 2.4GHz RF stack. Additionally, the device is certified for BLUETOOTH® Low Energy 5.3, Zigbee® 3.0, and OpenThread® radio functionalities.


  • Pair of Arm Cortex  processors
    • Arm Cortex-M4 CPU with FPU (Floating Point Unit)
      • Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory
      • Frequency up to 64MHz
      • Memory protection unit
      • 80 DMIPS/ 1.25 DMIPS/MHz (Dhrystone 2.1)
      • DSP instructions
    • Arm Cortex-M0+ CPU
      • Dedicated to 2.4GHz RF transceiver and security peripherals
  • 16MB external Flash memory
  • 256KB SRAM
  • 1.71V to 3.6V supply voltage range
  • 2.4GHz RF transceiver
    • Bluetooth 5.3
    • IEEE 802.15.4-2011 PHY and MAC
    • Programmable up to +6dBm (1dBm increments) output power
    • RX sensitivity
      • -96dBm for BLE @ 1Mbps
      • -100dBm for 802.15.4
    • 75m max range
  • Ultra-low power consumption
    • 13nA shutdown mode
    • 600nA stop mode
    • 600nA standby mode
    • 4.5mA (Rx)/5.2mA (Tx @ 0dBm) radio


  • Lighting and home automation
  • Wireless audio devices
  • Wellness, healthcare, personal trackers
  • Gaming and toys
  • Smart locks
  • Beacons and accessories
  • Industrial


Published: 2023-09-05 | Updated: 2023-09-25