STM32U083C-DK

Overview

The STM32U083C_DK board, featuring an ARM Cortex-M0+ based STM32U083MC 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 STM32U083C_DK board:

Ultra-low-power STM32U083MC microcontroller based on the Arm® Cortex®‑M0+ core, featuring 256 Kbytes of flash memory and 40 Kbytes of SRAM in an LQFP80 package.
Board connectors:
- ST-LINK USB Type-C connector
- User USB Device with USB Type-C connector
- mikroBUS connectors
- MIPI debug in connector (Arm® Cortex® 10‑pin 1.27 mm‑pitch debug connector over STDC14 footprint)
- Extension connectors for full access to all STM32 I/Os
- VBAT dedicated connector provides the capability to power the board on a battery
Flexible power-supply options:
- ST-LINK USB VBUS, USB connector, or external sources
4×24-segment LCD
Three user LEDs
Reset push-button
User joystick
Touchkey
Temperature sensor

More information about the board can be found at the STM32U083_DK 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 (LDO mode)
- Brownout reset
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
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
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
LCD driver: - 8*48 or 4*52 segments, with step-up converter
General-purpose inputs/outputs: - Up to 69 fast I/Os, most of them 5 V-tolerant
ECOPACK2 compliant packages

More information about STM32U083MC can be found here:

Supported Features

The stm32u083c_dk 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.

stm32u083c_dk

/

stm32u083xx

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 provider1 2	`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)2	`st,stm32-dma-v2`
DMA	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`
GPIO & Headers	on-board	GPIO pins exposed on Arduino Uno (R3) headers1	`arduino-header-r3`
I2C	on-chip	STM32 I2C V2 controller2 2	`st,stm32-i2c-v2`
Input	on-chip	STM32 Tocuh Sensing Controller (TSC) driver1	`st,stm32-tsc`
Input	on-board	Input driver for STM32 Tocuh Sensing Controller (TSC)1	`tsc-keys`
Interrupt controller	on-chip	ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1	`arm,v6m-nvic`
Interrupt controller	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`
Serial controller	on-chip	STM32 LPUART3	`st,stm32-lpuart`
SPI	on-chip	STM32 SPI controller with embedded Rx and Tx FIFOs3	`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)1 2	`st,stm32-lptim`
USB	on-chip	STM32 USB controller1	`st,stm32-usb`
Watchdog	on-chip	STM32 watchdog1	`st,stm32-watchdog`
Watchdog	on-chip	STM32 system window watchdog1	`st,stm32-window-watchdog`

Connections and IOs

STM32U083C_DK Board has 10 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32U083MC User Manual.

Default Zephyr Peripheral Mapping:

ADC1_IN8 : 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
SPI1_CS : PA15
UART_2_TX : PA2
UART_2_RX : PA3

System Clock

STM32U083C_DK 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

STM32U083C_DK board has 7 U(S)ARTs. The Zephyr console output is assigned to USART2. Default settings are 115200 8N1.

Programming and Debugging

STM32U083C_DK 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 pyocd
$ west flash --runner jlink

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 STM32U083C_DK

Connect the STM32U083C_DK 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 stm32u083c_dk samples/hello_world
west flash

You should see the following message on the console:

Hello World! stm32u083c_dk/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.