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

• Schematic
• Eagle Files
• Board Dimensions
• Datasheet (STM32WB55MMG)
• Datasheet (STM32WB55xx)
• Reference Manual (STM32WB55xx)
• Hookup Guide
• GitHub Hardware Repo

MicroMod Documentation

• Getting Started with MicroMod
• Designing with MicroMod
• MicroMod Info Page
• MicroMod Forums