STMicro Launches STM32WB55 Bluetooth 5 and 802.15.4 MCU & Nucleo Pack

Orange Pi Development Boards

STMicro unveiled their first STM32 Wireless MCU family at Embedded World 2018 last year with STM32WB dual core Cortex-M4/M0+ microcontroller equipped with Bluetooth 5 and 802.15.4 radios, but it was only thi year at Embedded World 2019 that the company announced commercial availability of STM32WB55 family as well as the P-NUCLEO-WB55 development pack containing a classical Nucleo 64 board and a USB dongle.

STMicro STM32WB55 Bluetooth 5 & 802.15.4 MCU

STM32WB55 Block Diagram
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Key features and specifications:

  • Application Core – Arm Cortex-M4 CPU @ up to 64 MHz with FPU, adaptive real-time accelerator (ART Accelerator), MPU, 80 DMIPS and DSP instructions
  • Memory  – Up to 256 KB RAM, including 64 KB with hardware parity check, 20×32-bit Backup Register
  • Storage
    • Up to 1 MB Flash with sector protection (PCROP) against R/W operations for Bluetooth Low Energy and 802.15.4 SW stack
    • Quad SPI memory interface with XIP
  • Radio
    • 2.4 GHz RF transceiver supporting Bluetooth 5 and IEEE 802.15.4-2011 PHY and MAC (Thread & ZigBee 3.0 protocol supported)
    • RX Sensitivity: -96 dBm (Bluetooth Low Energy at 1 Mbps), -100 dBm (802.15.4)
    • Programmable output power up to +6 dBm with 1 dB steps
    • Support for 2 Mbps
    • Dedicated Arm 32-bit Cortex M0 + CPU for real-time Radio layer
  • Peripherals
    • Up to 72 fast I/Os, 70 of them 5 V-tolerant
    • 12-bit ADC 4.26Msps, up to 16-bit
    • Inter Processor Communication Controller (IPCC) for communication with Bluetooth Low Energy and 802.15.4
    • 2x DMA controllers (7x channels each) supporting ADC, SPI, I2C, USART, QSPI, SAI, AES, Timers
    • 1x USART (ISO 7816, IrDA, SPI Master, Modbus and Smartcard mode)
    • 1x LPUART (Low Power)
    • 2x SPI 32 Mbit/s, 2x I2C (SMBus/PMBus)
    • 1x SAI (dual channel audio)
    • 1x USB 2.0 FS device, crystal-less, BCD and LPM
    • Touch Sensing controller, up to 18 sensors
    • 8×40 LCD with step-up converter
    • Timers – 1x 16-bit four channels, 2x 16-bits two channels, 1x 32-bits four channels,2x 16-bits (ultra-low-power)
    • 1x independent Systick, 1x independent watchdog, 1x window watchdog
  • Security & ID
    • Secure Firmware Installation (SFI) for Bluetooth Low Energy and 802.15.4 SW stack
    • 3x Hardware Encryption AES 256-bit
    • Customer key storage / key manager services
    • HW Public Key Authority (PKA)
    • Cryptographic algorithms: RSA, Diffie-Helman, ECC over GF(p)
    • True random number generator (TRNG)
    • Sector protection against R/W operation (PCROP)
    • CRC calculation unit
    • 96-bit unique ID
    • 64-bit unique ID. Possibility to derive 802.15.5 64-bit and Bluetooth Low Energy 48-bit EUI
  • Power
    • Supply – 1.71 V to 3.6 V
    • Consumption
      • 13 nA shutdown mode
      • 600 nA Standby mode + RTC + 32 KB RAM
      • 2.1 μA Stop mode + RTC + 256 KB RAM
      • Active-mode MCU + RF (SMPS ON): < 53 μA/MHz
      • Radio – Rx: 4.5 mA; Tx at 0 dBm: 5.2 mA
  • Debugging / Development  – Serial wire debug (SWD), JTAG for the Application processor, application cross trigger with input and output, Embedded Trace Macrocell for application
  • Temperature Range – -40°C to 85°C or -40°C to 105°C
  • Package – QFN48, QFN68, WLCSP100, and BGA129

STM32WB55 Product MatrixThere are now six parts in production with 256KB to 1MB flash memory, 128KB or 256KB RAM, 48-pin or 68-pin packages, and more parts are coming, now sampling, with 100-pin and 129-pin packages.

P-NUCLEO-WB55 Development Pack

P-NUCLEO-WB55 Development Pack
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The company also introduced P-NUCLEO-WB55 development pack with MB1355C board powered by STM32W55 with VFQFPN68 package, and MB1293C USB dongle based on STM32W55 MCU with a smaller UFQFPN48 package in order to easily get started with Bluetooth 5 and/or 802.15.4 (Zigbee/Thread) using the solution.

MB1355C Nucleo-68 board key features & specifications:

  • MCU
    • STM32WB microcontroller in a VFQFPN68 package
    • Radio – 2.4 GHz RF transceiver supporting Bluetooth 5.0 and IEEE 802.15.4-2011 PHY and MAC
    • Dedicated Arm 32-bit Cortex M0+ CPU for real-time Radio layer
  • Antennas – Integrated PCB antenna or footprint for SMA connector
  • USB – 1x micro USB port
  • Expansion – Arduino UNO V3 and ST morpho headers
  • Debugging – On-board ST-LINK/V2-1 debugger/programmer with USB re- enumeration capability: mass storage, virtual COM port and debug port
  • Misc – 3x user LEDs, 3x user buttons and 1x reset button
  • Power Supply – ST-LINK USB VBUS or external sources; on-board socket for CR2032 battery

STM32WB55 Development Board

Main features of MB1293C USB dongle:

  • MCU
    • STM32WB microcontroller in UFQFPN48 package
    • 2.4 GHz RF transceiver supporting Bluetooth 5.0 and IEEE 802.15.4-2011 PHY and MAC
    • Dedicated Arm 32-bit Cortex M0+ CPU for real-time Radio layer
  • Antenna – Integrated PCB antenna or UFL connector
  • SB – 1x USB port
  • Misc – Switch for boot management, 1x user push button, 3x user LEDs

The company provides free software libraries and examples available with the STM32Cube package, as well as support for various Integrated Development Environments (IDEs), including IAR Embedded, Keil, GCC-based IDEs, and Arm Mbed. STM32CubeMonRF is a GUI software tool that enables testing the performance of BLE and 802.15.4 radios in STM32WB MCU. For example, you’ll be able to measure various output powers, PER (Peak-Error-Rate), the overall signal quality, and/or to setup custom scripts to handle specific use-cases.

STM32 Bluetooth 5 Zigbee Thread

Pricing for STM32WB55 MCU starts at $3.24 per unit for 10k orders, and P-NUCLEO-WB55 development pack is sold for $42. For more information, including extensive hardware and software documentation, and/or to purchase samples, visit the respective product pages here and there.

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Interesting chip, let’s see how good their software is, as that’s really what matters with these things. Hence why Nordic is market leader and charge what they charge.