Nucleo WBA55CG

Overview

NUCLEO-WBA55CG is a Bluetooth® Low Energy wireless and ultra-low-power board embedding a powerful and ultra-low-power radio compliant with the Bluetooth® Low Energy SIG specification v5.3.

The ARDUINO® Uno V3 connectivity support and the ST morpho headers allow the easy expansion of the functionality of the STM32 Nucleo open development platform with a wide choice of specialized shields.

Ultra-low-power wireless STM32WBA55CG microcontroller based on the Arm® Cortex®-M33 core, featuring 1 Mbyte of flash memory and 128 Kbytes of SRAM in a UFQFPN48 package
MCU RF board (MB1863):
- 2.4 GHz RF transceiver supporting Bluetooth® specification v5.3
- Arm® Cortex®-M33 CPU with TrustZone®, MPU, DSP, and FPU
- Integrated PCB antenna
Three user LEDs
Three user and one reset push-buttons
Board connectors:
- USB Micro-B
- ARDUINO® Uno V3 expansion connector
- ST morpho headers for full access to all STM32 I/Os
Flexible power-supply options: ST-LINK USB VBUS or external sources
On-board STLINK-V3MODS debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port, and debug port

Hardware

The STM32WBA55xx multiprotocol wireless and ultralow power devices embed a powerful and ultralow power radio compliant with the Bluetooth® SIG Low Energy specification 5.3. They contain a high-performance Arm Cortex-M33 32-bit RISC core. They operate at a frequency of up to 100 MHz.

Includes ST state-of-the-art patented technology
Ultra low power radio:
- 2.4 GHz radio
- RF transceiver supporting Bluetooth® Low Energy 5.3 specification
- Proprietary protocols
- RX sensitivity: -96 dBm (Bluetooth® Low Energy at 1 Mbps)
- Programmable output power, up to +10 dBm with 1 dB steps
- Integrated balun to reduce BOM
- Suitable for systems requiring compliance with radio frequency regulations ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15 and ARIB STD-T66
Ultra low power platform with FlexPowerControl:
- 1.71 to 3.6 V power supply
- - 40 °C to 85 °C temperature range
- Autonomous peripherals with DMA, functional down to Stop 1 mode
- 140 nA Standby mode (16 wake-up pins)
- 200 nA Standby mode with RTC
- 2.4 µA Standby mode with 64 KB SRAM
- 16.3 µA Stop mode with 64 KB SRAM
- 45 µA/MHz Run mode at 3.3 V
- Radio: Rx 7.4 mA / Tx at 0 dBm 10.6 mA
Core: Arm® 32-bit Cortex®-M33 CPU with TrustZone®, MPU, DSP, and FPU
ART Accelerator™: 8-Kbyte instruction cache allowing 0-wait-state execution from flash memory (frequency up to 100 MHz, 150 DMIPS)
Power management: embedded regulator LDO supporting voltage scaling
Benchmarks:
- 1.5 DMIPS/MHz (Drystone 2.1)
- 407 CoreMark® (4.07 CoreMark/MHz)
Clock sources:
- 32 MHz crystal oscillator
- 32 kHz crystal oscillator (LSE)
- Internal low-power 32 kHz (±5%) RC
- Internal 16 MHz factory trimmed RC (±1%)
- PLL for system clock and ADC
Memories:
- 1 MB flash memory with ECC, including 256 Kbytes with 100 cycles
- 128 KB SRAM, including 64 KB with parity check
- 512-byte (32 rows) OTP
Rich analog peripherals (independent supply):
- 12-bit ADC 2.5 Msps with hardware oversampling
Communication peripherals:
- Three UARTs (ISO 7816, IrDA, modem)
- Two SPIs
- Two I2C Fm+ (1 Mbit/s), SMBus/PMBus®
System peripherals:
- Touch sensing controller, up to 20 sensors, supporting touch key, linear,
  rotary touch sensors
- One 16-bit, advanced motor control timer
- Three 16-bit timers
- One 32-bit timer
- Two low-power 16-bit timers (available in Stop mode)
- Two Systick timers
- Two watchdogs
- 8-channel DMA controller, functional in Stop mode
Security and cryptography:
- Arm® TrustZone® and securable I/Os, memories, and peripherals
- Flexible life cycle scheme with RDP and password protected debug
- Root of trust thanks to unique boot entry and secure hide protection area (HDP)
- SFI (secure firmware installation) thanks to embedded RSS (root secure services)
- Secure data storage with root hardware unique key (RHUK)
- Secure firmware upgrade support with TF-M
- Two AES co-processors, including one with DPA resistance
- Public key accelerator, DPA resistant
- HASH hardware accelerator
- True random number generator, NIST SP800-90B compliant
- 96-bit unique ID
- Active tampers
- CRC calculation unit
Up to 35 I/Os (most of them 5 V-tolerant) with interrupt capability
Development support:
- Serial wire debug (SWD), JTAG
ECOPACK2 compliant package

More information about STM32WBA series can be found here:

STM32WBA Series on www.st.com

Supported Features

The nucleo_wba55cg board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`nucleo_wba55cg/stm32wba55xx` target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M33 CPU1	`arm,cortex-m33`
ADC	on-chip	STM32 ADC1	`st,stm32-adc`
Bluetooth	on-chip	Bluetooth HCI driver for ST STM32WBA1	`st,hci-stm32wba`
Clock control	on-chip	STM32WBA RCC (Reset and Clock controller)1	`st,stm32wba-rcc`
	on-chip	STM32WBA HSE Clock1	`st,stm32wba-hse-clock`
	on-chip	Generic fixed-rate clock provider1 1	`fixed-clock`
	on-chip	STM32 LSE Clock1	`st,stm32-lse-clock`
	on-chip	STM32WBA PLL1	`st,stm32wba-pll-clock`
	on-chip	STM32 Microcontroller Clock Output (MCO)1	`st,stm32-clock-mco`
Counter	on-chip	STM32 counters5	`st,stm32-counter`
DMA	on-chip	STM32U5 DMA controller1	`st,stm32u5-dma`
Flash controller	on-chip	STM32 Family flash controller1	`st,stm32-flash-controller`
GPIO & Headers	on-chip	STM32 GPIO Controller4	`st,stm32-gpio`
	on-chip	Serial Wire - JTAG Connector1	`swj-connector`
	on-board	GPIO pins exposed on Arduino Uno (R3) headers1	`arduino-header-r3`
I2C	on-chip	STM32 I2C V2 controller1 1	`st,stm32-i2c-v2`
I2S	on-chip	STM32 SAI controller2	`st,stm32-sai`
IEEE 802.15.4	on-chip	ST STM32WBA IEEE 802.15.41	`st,stm32wba-ieee802154`
Input	on-board	Group of GPIO-bound input keys1	`gpio-keys`
Interrupt controller	on-chip	ARMv8-M NVIC (Nested Vectored Interrupt Controller)1	`arm,v8m-nvic`
Interrupt controller	on-chip	STM32G0 External Interrupt Controller1	`st,stm32g0-exti`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
LED	on-board	Group of PWM-controlled LEDs1	`pwm-leds`
MMU / MPU	on-chip	ARMv8-M MPU (Memory Protection Unit)1	`arm,armv8m-mpu`
MTD	on-chip	STM32 flash memory1	`st,stm32-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	STM32 Pin controller1	`st,stm32-pinctrl`
Power management	on-chip	STM32 power controller1	`st,stm32-pwr`
PWM	on-chip	STM32 PWM1 4	`st,stm32-pwm`
Reset controller	on-chip	STM32 Reset and Clock Control (RCC) Controller1	`st,stm32-rcc-rctl`
RNG	on-chip	STM32 Random Number Generator1	`st,stm32-rng`
RTC	on-chip	STM32 RTC1	`st,stm32-rtc`
Sensors	on-chip	STM32 family TEMP node for production calibrated sensors with two calibration temperatures1	`st,stm32-temp-cal`
Serial controller	on-chip	STM32 USART2	`st,stm32-usart`
Serial controller	on-chip	STM32 LPUART1	`st,stm32-lpuart`
SMbus	on-chip	STM32 SMBus controller2	`st,stm32-smbus`
SPI	on-chip	STM32H7 SPI controller1 1	`st,stm32h7-spi`
Timer	on-chip	ARMv8-M System Tick1	`arm,armv8m-systick`
	on-chip	STM32 timers1 4	`st,stm32-timers`
	on-chip	STM32 low-power timer (LPTIM)1 1	`st,stm32-lptim`
Watchdog	on-chip	STM32 watchdog1	`st,stm32-watchdog`
Watchdog	on-chip	STM32 system window watchdog1	`st,stm32-window-watchdog`

Bluetooth support

BLE support is enabled on nucleo_wba55cg. To build a zephyr sample using this board you first need to install Bluetooth Controller libraries available in Zephyr as binary blobs.

To fetch Binary Blobs:

west blobs fetch hal_stm32

Connections and IOs

Nucleo WBA55CG Board has 4 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

Default Zephyr Peripheral Mapping:

USART_1 TX/RX : PB12/PA8
I2C_1_SCL : PB2
I2C_1_SDA : PB1
USER_PB : PC13
LD1 : PB4
SPI_1_NSS : PA12 (arduino_spi)
SPI_1_SCK : PB4 (arduino_spi)
SPI_1_MISO : PB3 (arduino_spi)
SPI_1_MOSI : PA15 (arduino_spi)

System Clock

Nucleo WBA55CG System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by HSE+PLL clock at 100MHz.

Serial Port

Nucleo WBA55CG board has 1 U(S)ARTs. The Zephyr console output is assigned to USART1. Default settings are 115500 8N1.

Programming and Debugging

The nucleo_wba55cg board supports the runners and associated west commands listed below.

	flash	debug	rtt	debugserver	attach
openocd	✅	✅ (default)	✅	✅	✅
stm32cubeprogrammer	✅ (default)

Nucleo WBA55CG board includes an ST-LINK/V3 embedded debug tool interface. It could be used for flash and debug using either OpenOCD or STM32Cube ecosystem tools.

Flashing

The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.

Alternatively, openocd can also be used to flash the board using the --runner (or -r) option:

$ west flash --runner openocd

Flashing an application to Nucleo WBA55CG

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b nucleo_wba55cg samples/basic/blinky
west flash

You will see the LED blinking every second.

Debugging

Debugging using OpenOCD

You can debug an application in the usual way using OpenOCD. Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b nucleo_wba55cg samples/basic/blinky
west debug

Debugging using STM32CubeIDE

You can debug an application using a STM32WBA compatible version of STM32CubeIDE.

For that:

Create an empty STM32WBA project by going to File > New > STM32 project
Select your MCU, click Next, and select an Empty project.
Right click on your project name, select Debug as > Debug configurations
In the new window, create a new target in STM32 Cortex-M C/C++ Application
Select the new target and enter the path to zephyr.elf file in the C/C++ Application field
Check Disable auto build
Run debug