Nucleo WBA25CE1

Overview

NUCLEO-WBA25CE1 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 STM32WBA25CE1 microcontroller based on the Arm® Cortex®-M33 core, featuring 512 Kbytes of flash memory and 96 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
8-pin SOP Quad-SPI NOR flash memory footprint
Board connectors:
- USB Type-C®
- 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 STM32WBA2xxx multiprotocol wireless and ultra-low-power devices embed a powerful and ultra-low-power 2.4 GHz RADIO compliant with the Bluetooth® LE specifications and with IEEE 802.15.4-2015. They contain a high-performance Arm® Cortex®-M33 32-bit RISC core. They operate at a frequency of up to 64 MHz.

Includes ST state-of-the-art patented technology
Ultra low power radio:
- 2.4 GHz radio
- RF transceiver supporting Bluetooth® LE, IEEE 802.15.4-2015 PHY and MAC, supporting Matter and Zigbee®
- RX sensitivity: -96 dBm (Bluetooth® LE at 1 Mbps), -100 dBm (IEEE 802.15.4 at 250 kbps)
- Programmable output power, up to +10 dBm with 1 dB steps
- Support for external PA
- Packet traffic arbitration
- 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 to 85/105 °C ambiant temperature range
- Autonomous peripherals with DMA, functional down to Stop 1 mode
- 110 nA Standby mode (7 wake-up pins)
- 490 nA Standby mode with 64 KB SRAM
- 980 nA Standby mode with 64 KB SRAM, 2.4 GHz radio, RTC
- 4.81 µA Stop mode with 64 KB SRAM, 2.4 GHz radio, RTC
- 21 µA/MHz Run mode
- Radio: Rx 3.58 mA / Tx at 0 dBm 4.65 mA
Core: Arm® 32-bit Cortex®-M33 CPU with TrustZone®, MPU, DSP, and FPU
ART Accelerator™: 4-Kbyte instruction cache allowing 0-wait-state execution from flash memory (frequency up to 64 MHz, 96 DMIPS)
Power management: Embedded regulator LDO and SMPS step-down converter, supporting switch on-the-fly and voltage scaling
Benchmarks:
- 264 CoreMark® (4.12 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, audio, USB and ADC
Memories:
- 512-Kbyte flash memory with ECC and 10 kcycles
- 96 KB SRAM, including 32 KB with parity check
- 512-byte (32 rows) OTP
- One Quad-SPI memory interface
Analog peripherals (independent supply):
- 12-bit ADC 2.5 Msps up to 16-bit with hardware oversampling
Communication peripherals:
- One USB full-speed selectable host or device controller
- One SAI (serial audio interface)
- One USART (ISO 7816, IrDA, modem)
- One LPUART (ISO 7816, modem)
- One SPI
- Two I2C Fm+ (1 Mbit/s), SMBus/PMBus®
System peripherals:
- Two 16-bit timers
- One 32-bit timer
- Two low-power 16-bit timers (available in Stop mode)
- Two SysTick timers
- RTC with hardware calendar and calibration
- One watchdog
- 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)
- Secure boot and secure firmware update
- AES accelerator
- Public key accelerator, ECC and RSA, SCA resistant
- HASH hardware accelerator
- True random number generator, NIST SP800-90B compliant
- 96-bit unique ID
- Antitamper protections
Development support:
- Serial wire debug (SWD), JTAG
- Embedded trace (ETM)
ECOPACK2 compliant package

More information about STM32WBA series can be found here:

STM32WBA Series on www.st.com

Supported Features

The nucleo_wba25ce1 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_wba25ce1/stm32wba25xx` 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 counters4	`st,stm32-counter`
CRC	on-chip	STM32 CRC calculation unit1	`st,stm32-crc`
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`
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`
NVMEM	on-chip	Fixed layout for Non-Volatile memory1	`fixed-layout`
OTP memory	on-chip	STM32 embedded NVM OTP1 1	`st,stm32-nvm-otp`
Pin control	on-chip	STM32 Pin controller1	`st,stm32-pinctrl`
Power management	on-chip	STM32WBA power controller1	`st,stm32wba-pwr`
PWM	on-chip	STM32 PWM1 3	`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 USART1	`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	`st,stm32h7-spi`
Timer	on-chip	ARMv8-M System Tick1	`arm,armv8m-systick`
	on-chip	STM32 timers1 3	`st,stm32-timers`
	on-chip	STM32 low-power timer (LPTIM)1 1	`st,stm32-lptim`
Watchdog	on-chip	STM32 watchdog1	`st,stm32-watchdog`

Connections and IOs

Nucleo WBA25CE1 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 : PA6/PA12
I2C_3_SCL : PB2
I2C_3_SDA : PA11
USER_PB_1 : PA1
USER_PB_2 : PC13
USER_PB_3 : PA2
LD1 : PA7
LD2 : PB12
LD3 : PB15
SPI_3_NSS : PA5 (arduino_spi)
SPI_3_SCK : PA8 (arduino_spi)
SPI_3_MISO : PA10 (arduino_spi)
SPI_3_MOSI : PA9 (arduino_spi)

System Clock

Nucleo WBA25CE1 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 64 MHz.

Serial Port

Nucleo WBA25CE1 board has 1 USART. The Zephyr console output is assigned to USART1. Default settings are 115200 8N1.

Programming and Debugging

The nucleo_wba25ce1 board supports the runners and associated west commands listed below.

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

Nucleo WBA25CE1 board includes an ST-LINK/V3 embedded debug tool interface. It could be used for flash and debug using STM32Cube ecosystem tools.

Flashing

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

Flashing an application to Nucleo WBA25CE1

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b nucleo_wba25ce1 samples/basic/blinky
west flash

You will see the LED blinking every second.

Debugging

Debugging using ST-LINK GDB server

You can debug an application using the ST-LINK GDB server. For that you need to have The STM32CubeCLT installed . see STM32CubeCLT Flash & Debug Host Tools for more details.

# From the root of the zephyr repository
west build -b nucleo_wba25ce1 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