Nucleo U083RC

Board Overview

Nucleo U083RC

Name:

nucleo_u083rc

Vendor:

STMicroelectronics

Architecture:

arm

SoC:

stm32u083xx

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Overview

The Nucleo U083RC board, featuring an ARM Cortex-M0+ based STM32U083RC MCU, provides an affordable and flexible way for users to try out new concepts and build prototypes by choosing from the various combinations of performance and power consumption features. Here are some highlights of the Nucleo U083RC board:

• STM32U083RC microcontroller in LQFP64 package

• Two types of extension resources:

  • Arduino Uno V3 connectivity

  • ST morpho extension pin headers for full access to all STM32U0 I/Os

• On-board STLINK-V2EC debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port, and debug port

• Flexible board power supply:

  • USB VBUS or external source(3.3V, 5V, 7 - 12V)

• User LED shared with ARDUINO® Uno V3

• Two push-buttons: USER and RESET

• USB Type-C® connector for the ST-LINK

More information about the board can be found at the NUCLEO_U083RC website.

Hardware

The STM32U083xC devices are an ultra-low-power microcontrollers family (STM32U0 Series) based on the high-performance Arm® Cortex®-M0+ 32-bit RISC core. They operate at a frequency of up to 56 MHz.

• Includes ST state-of-the-art patented technology

• Ultra-low-power with FlexPowerControl:

  • 1.71 V to 3.6 V power supply

  • -40 °C to +85/125 °C temperature range

  • 130 nA VBAT mode: supply for RTC, 9 x 32-bit backup registers

  • 16 nA Shutdown mode (6 wake-up pins)

  • 30 nA Standby mode (6 wake-up pins) without RTC

  • 160 nA Standby mode with RTC

  • 825 nA Stop 2 mode with RTC

  • 695 nA Stop 2 mode without RTC

  • 4 µA wake-up from Stop mode

  • 52 µA/MHz Run mode

  • Brownout reset

  • SPI (3)

  • DMA Controller (2)

• Core:

  • 32-bit Arm® Cortex®-M0+ CPU, frequency up to 56 MHz

• ART Accelerator:

  • 1-Kbyte instruction cache allowing 0-wait-state execution from flash memory

• Benchmarks:

  • 1.13 DMIPS/MHz (Drystone 2.1)

  • 134 CoreMark® (2.4 CoreMark/MHz at 56 MHz)

  • 407 ULPMark™-CP

  • 143 ULPMark™-PP

  • 19.7 ULPMark™-CM

• Memories:

  • 256-Kbyte single bank flash memory, proprietary code readout protection

  • 40-Kbyte SRAM with hardware parity check

• General-purpose input/outputs:

  • Up to 69 fast I/Os, most of them 5 V‑tolerant

• Clock management:

  • 4 to 48 MHz crystal oscillator

  • 32 kHz crystal oscillator for RTC (LSE)

  • Internal 16 MHz factory-trimmed RC (±1%)

  • Internal low-power 32 kHz RC (±5%)

  • Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)

  • Internal 48 MHz with clock recovery

  • PLL for system clock, USB, ADC

• Security:

  • Customer code protection

  • Robust read out protection (RDP): 3 protection level states and password-based regression (128-bit PSWD)

  • Hardware protection feature (HDP)

  • Secure boot

  • AES: 128/256-bit key encryption hardware accelerator

  • True random number generation, candidate for NIST SP 800-90B certification

  • Candidate for Arm® PSA level 1 and SESIP level 3 certifications

  • 5 passive anti-tamper pins

  • 96-bit unique ID

  • True Random Number Generator (RNG) NIST SP800-90B compliant

• Up to 10 timers, 2 watchdogs and RTC:

  • 1x 16-bit advanced motor-control, 1x 32-bit and 3x 16-bit general purpose, 2x 16-bit basic, 3x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer

  • RTC with hardware calendar, alarms and calibration

• 3 low-power 16-bit timers (available in Stop mode).

• Up to 20 communication peripherals:

  • 1 USB 2.0 full-speed crystal-less solution with LPM and BCD

  • 7 USARTs/LPUARTs (SPI, ISO 7816, LIN, IrDA, modem)

  • 4 I2C interfaces supporting Fast-mode and Fast-mode Plus (up to 1 Mbit/s)

  • 3 SPIs, plus 4x USARTs in SPI mode

  • IRTIM (Infrared interface)

• Rich analog peripherals (independent supply):

  • 1x 12-bit ADC (0.4 µs conversion time), up to 16-bit with hardware oversampling

  • 1x 12-bit DAC output channel, low-power sample and hold

  • 1x general-purpose operational amplifier with built-in PGA (variable gain up to 16)

  • 2x ultra-low-power comparators

• ECOPACK2 compliant packages

More information about STM32U083RC can be found here:

• STM32U083RC on www.st.com

• STM32U083 reference manual

Supported Features

The nucleo_u083rc 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_u083rc/stm32u083xx target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M0+ CPU1	arm,cortex-m0+
ADC	on-chip	STM32 ADC1	st,stm32-adc
Clock control	on-chip	STM32F0/G0 RCC (Reset and Clock controller)1	st,stm32f0-rcc
	on-chip	STM32 HSE Clock1	st,stm32-hse-clock
	on-chip	Generic fixed-rate clock provider3	fixed-clock
	on-chip	STM32 MSI Clock1	st,stm32-msi-clock
	on-chip	STM32 LSE Clock1	st,stm32-lse-clock
	on-chip	STM32U0 Main PLL1	st,stm32u0-pll-clock
Counter	on-chip	STM32 counters5	st,stm32-counter
Cryptographic accelerator	on-chip	STM32 AES Accelerator1	st,stm32-aes
DAC	on-chip	STM32 family DAC1	st,stm32-dac
DMA	on-chip	STM32 DMA controller (V2)1 1	st,stm32-dma-v2
	on-chip	STM32 DMAMUX controller1	st,stm32-dmamux
Flash controller	on-chip	STM32 Family flash controller1	st,stm32-flash-controller
GPIO & Headers	on-chip	STM32 GPIO Controller6	st,stm32-gpio
	on-board	GPIO pins exposed on Arduino Uno (R3) headers1	arduino-header-r3
I2C	on-chip	STM32 I2C V2 controller1 3	st,stm32-i2c-v2
Input	on-chip	STM32 Tocuh Sensing Controller (TSC) driver1	st,stm32-tsc
	on-board	Group of GPIO-bound input keys1	gpio-keys
Interrupt controller	on-chip	ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1	arm,v6m-nvic
	on-chip	STM32G0 External Interrupt Controller1	st,stm32g0-exti
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
MTD	on-chip	STM32 flash memory1	st,stm32-nv-flash
PHY	on-chip	This binding is to be used by all the usb transceivers which are built-in with USB IP1	usb-nop-xceiv
Pin control	on-chip	STM32 Pin controller1	st,stm32-pinctrl
PWM	on-chip	STM32 PWM2 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
Serial controller	on-chip	STM32 USART2 2	st,stm32-usart
	on-chip	STM32 LPUART3	st,stm32-lpuart
SPI	on-chip	STM32 SPI controller with embedded Rx and Tx FIFOs1 2	st,stm32-spi-fifo
Timer	on-chip	ARMv6-M System Tick1	arm,armv6m-systick
	on-chip	STM32 timers2 5	st,stm32-timers
	on-chip	STM32 low-power timer (LPTIM)2 1	st,stm32-lptim
USB	on-chip	STM32 USB controller1	st,stm32-usb
Watchdog	on-chip	STM32 watchdog1	st,stm32-watchdog
	on-chip	STM32 system window watchdog1	st,stm32-window-watchdog

Connections and IOs

Nucleo U083RC Board has 10 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32U083 User Manual.

Default Zephyr Peripheral Mapping:

• DAC1_OUT1 : PA4

• I2C1_SCL : PB8

• I2C1_SDA : PB9

• LPUART_1_TX : PG7

• LPUART_1_RX : PG8

• SPI1_NSS : PA4

• SPI1_SCK : PA5

• SPI1_MISO : PA6

• SPI1_MOSI : PA7

• UART_2_TX : PA2

• UART_2_RX : PA3

• USER_PB : PC13

System Clock

Nucleo U083RC System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 48MHz, driven by 4MHz medium speed internal oscillator.

Serial Port

Nucleo U083RC board has 7 U(S)ARTs. The Zephyr console output is assigned to USART2. Default settings are 115200 8N1.

Programming and Debugging

Nucleo U083RC board includes an ST-LINK/V3 embedded debug tool interface. This probe allows to flash the board using various tools.

Flashing

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

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

$ west flash --runner jlink
$ west flash --runner pyocd

For pyOCD, additional target information needs to be installed. This can be done by executing the following commands.

$ pyocd pack --update
$ pyocd pack --install stm32u0

Flashing an application to Nucleo U083RC

Connect the Nucleo U083RC to your host computer using the USB port. Then build and flash an application. Here is an example for the Hello World application.

Run a serial host program to connect with your Nucleo board:

$ minicom -D /dev/ttyACM0

Then build and flash the application.

# From the root of the zephyr repository
west build -b nucleo_u083rc samples/hello_world
west flash

You should see the following message on the console:

Hello World! nucleo_u083rc/stm32u083xx

Debugging

Default flasher for this board is openocd. It could be used in the usual way. Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b nucleo_u083rc samples/basic/blinky
west debug

Note: Check the build/tfm directory to ensure that the commands required by these scripts (readlink, etc.) are available on your system. Please also check STM32_Programmer_CLI (which is used for initialization) is available in the PATH.