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The MicroMod STM32WB5MMG Processor expands on SparkFun's MicroMod ST product line with a powerful combination of computing and wireless capabilities on one M.2-connectable processor. The STM32WB5MMG from STMicroelectronics™ is an ultra-low power microcontroller that combines a pair of Arm® Cortex® processors; a Cortex-M4 processor with FPU and ART for primary computing and a Cortex-M0 to run the 2.4 GHz RF stack. The module's radio is Bluetooth® Low Energy 5.3, Zigbee® 3.0, and OpenThread certified.
The Cortex-M4 CPU on this Processor can operate at a frequency of up to 64 MHz and features a floating point unit (FPU) single precision, which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. The module uses an integrated chip antenna for the RF stack with Tx output power up to +6 dBm and Rx sensitivity of -96 dBm for BLE and -100 dBm for 802.15.4 protocols. The processor includes an additional 128Mb (16MB) serial flash memory chip.
MicroMod is a modular interface ecosystem that connects a microcontroller “processor board” to various “carrier board” peripherals. Utilizing the M.2 standard, the MicroMod standard is designed to easily swap out processors on the fly. Pair a specialized carrier board for the project you need with your choice of compatible processor!
STM32WB5MMG General Features:
  • 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 64 MHz
      • Memory protection unit
      • 80 DMIPS/ 1.25 DMIPS/MHz (Dhrystone 2.1)
      • DSP instructions
    • Arm® Cortex®-M0+ CPU 
      • Dedicated to 2.4 GHz RF transceiver and security peripherals
  • 2.4 GHz RF Transceiver 
    • Bluetooth® 5.3
    • IEEE 802.15.4-2011 PHY and MAC
    • Output Power: Programmable up to +6 dBm (1 dBm increments)
    • RX Sensitivity: 
      • -96 dBm for BLE @ 1 Mbps
      • -100 dBm for 802.15.4
    • Max Range: 75 m
  • 16 MB External Flash memory
  • 256 KB SRAM
  • Supply Voltage Range: 1.71 to 3.6 V
  • Ultra-Low Power Consumption 
    • Shutdown Mode: 13 nA
    • Stop Mode: 600 nA
    • Standby Mode: 600 nA
    • Radio: 4.5 mA (Rx) / 5.2 mA (Tx @ 0 dBm)
Specific Peripherals available on MicroMod STM32WB5MMG
  • Two UART (One low power)
  • Two I2C Buses
  • SPI
  • I2S Audio
  • 16-bit Advanced Four-Channel Timer
  • Two Dedicated Analog Inputs
  • Two Dedicated PWM 
    • Shared with Timer pins
  • Eight General Purpose I/O Pins
MicroMod STM32WB5MMG Processor Documentation
MicroMod Documentation

The SparkFun MicroMod STM32WB5MMG Processor appears in the following collections:

SKU SF-DEV-21438