Nucleo L412RB-P

Overview

The Nucleo L412RB board features an ARM Cortex-M4 based STM32L412RB MCU with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo L412RB board:

  • STM32 microcontroller in LQFP64 package

  • 1 user LED shared with ARDUINO®

  • 1 user and 1 reset push-buttons

  • 32.768 kHz crystal oscillator

  • Two types of extension resources:

    • Arduino Uno V3 connectivity

    • ST morpho extension pin headers for full access to all STM32 I/Os

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

  • Flexible power-supply options: ST-LINK, USB VBUS, or external sources

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

    • Power management access point

  • Board specific features

    • External SMPS to generate Vcore logic supply

    • 24 MHz HSE

    • Board connectors:

      • External SMPS experimentation dedicated connector

      • Micro-AB or Mini-AB USB connector for the ST-LINK

      • MIPI® debug connector

    • Arm® Mbed Enabled™ compliant

More information about the board can be found at the Nucleo L412RB-P website.

Hardware

Nucleo L412RB-P provides the following hardware components:

  • STM32L412RBT6 in LQFP64 package

  • Ultra-low-power with FlexPowerControl

    • 1.71 V to 3.6 V power supply

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

    • 300 nA in VBAT mode: supply for RTC and 32x32-bit backup registers

    • 16 nA Shutdown mode (4 wakeup pins)

    • 32 nA Standby mode (4 wakeup pins)

    • 245 nA Standby mode with RTC

    • 0.7 µA Stop 2 mode, 0.95 µA with RTC

    • 79 µA/MHz run mode (LDO Mode)

    • 28 µA/MHz run mode (@3.3 V SMPS Mode)

    • Batch acquisition mode (BAM)

    • 4 µs wakeup from Stop mode

    • Brown out reset (BOR)

    • Interconnect matrix

  • Core: Arm® 32-bit Cortex® -M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™ ) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions

  • Performance benchmark

    • 1.25 DMIPS/MHz (Drystone 2.1)

    • 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)

  • Energy benchmark

    • 442 ULPMark-CP®

    • 165 ULPMark-PP®

  • Clock Sources:

    • 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

  • Up to 52 fast I/Os, most 5 V-tolerant

  • RTC with HW calendar, alarms and calibration

  • Up to 12 capacitive sensing channels: support touchkey, linear and rotary touch sensors

  • 10x timers:

    • 1x 16-bit advanced motor-control

    • 1x 32-bit and 2x 16-bit general purpose

    • 1x 16-bit basic

    • 2x low-power 16-bit timers (available in Stop mode)

    • 2x watchdogs

    • SysTick timer

  • Memories

    • 128 KB single bank Flash, proprietary code readout protection

    • 40 KB of SRAM including 8 KB with hardware parity check

    • Quad SPI memory interface with XIP capability

  • Rich analog peripherals (independent supply)

    • 2x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps

    • 2x operational amplifiers with built-in PGA

    • 1x ultra-low-power comparator

    • Accurate 2.5 V or 2.048 V reference voltage buffered output

  • 12x communication interfaces - USB 2.0 full-speed crystal less solution with LPM and BCD - 3x I2C FM+(1 Mbit/s), SMBus/PMBus - 3x USARTs (ISO 7816, LIN, IrDA, modem) - 1x LPUART (Stop 2 wake-up) - 2x SPIs (and 1x Quad SPI) - IRTIM (Infrared interface)

  • 14-channel DMA controller

  • True random number generator

  • CRC calculation unit, 96-bit unique ID

  • Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™

  • All packages are ECOPACK2 compliant

Note: the current board revision is C. (MB1319C)

More information about STM32L412RB can be found here:

Supported Features

The nucleo_l412rb_p 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_l412rb_p/stm32l412xx target

Type

Location

Description

Compatible

CPU

on-chip

ARM Cortex-M4F CPU1

arm,cortex-m4f

ADC

on-chip

STM32 ADC1 1

st,stm32-adc

Clock control

on-chip

STM32 RCC (Reset and Clock controller)1

st,stm32-rcc

on-chip

STM32 HSE Clock1

st,stm32-hse-clock

on-chip

Generic fixed-rate clock provider2 1

fixed-clock

on-chip

STM32 MSI Clock1

st,stm32-msi-clock

on-chip

STM32 LSE Clock1

st,stm32-lse-clock

on-chip

STM32L4/L5 main PLL1

st,stm32l4-pll-clock

on-chip

STM32 Microcontroller Clock Output (MCO)1

st,stm32-clock-mco

Counter

on-chip

STM32 counters4

st,stm32-counter

DMA

on-chip

STM32 DMA controller (V2)2

st,stm32-dma-v2

Flash controller

on-chip

STM32 Family flash controller1

st,stm32-flash-controller

GPIO & Headers

on-chip

STM32 GPIO Controller4

st,stm32-gpio

on-board

GPIO pins exposed on Arduino Uno (R3) headers1

arduino-header-r3

I2C

on-chip

STM32 I2C V2 controller1 2

st,stm32-i2c-v2

Input

on-board

Group of GPIO-bound input keys1

gpio-keys

Interrupt controller

on-chip

ARMv7-M NVIC (Nested Vectored Interrupt Controller)1

arm,v7m-nvic

on-chip

STM32 External Interrupt Controller1

st,stm32-exti

LED

on-board

Group of GPIO-controlled LEDs1

gpio-leds

MTD

on-chip

STM32 flash memory1

st,stm32-nv-flash

on-board

Fixed partitions of a flash (or other non-volatile storage) memory1

fixed-partitions

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

Power management

on-chip

STM32 power controller1

st,stm32-pwr

PWM

on-chip

STM32 PWM1 3

st,stm32-pwm

QSPI

on-chip

STM32 QSPI Controller1

st,stm32-qspi

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

on-chip

STM32 VREF+1

st,stm32-vref

on-chip

STM32 VBAT1

st,stm32-vbat

Serial controller

on-chip

STM32 USART3

st,stm32-usart

on-chip

STM32 LPUART1

st,stm32-lpuart

SMbus

on-chip

STM32 SMBus controller3

st,stm32-smbus

SPI

on-chip

STM32 SPI controller with embedded Rx and Tx FIFOs1 1

st,stm32-spi-fifo

SRAM

on-chip

Generic on-chip SRAM description1

mmio-sram

Timer

on-chip

ARMv7-M System Tick1

arm,armv7m-systick

on-chip

STM32 timers1 4

st,stm32-timers

on-chip

STM32 low-power timer (LPTIM)2

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 L412RB-P Board has 5 GPIO controllers (Ports A, B, C, D and H). These controllers are responsible for pin muxing, input/output, pull-up, etc.

Available pins:

Nucleo L412RB-P

For more details please refer to ST Nucleo L412RB-P User Manual.

Default Zephyr Peripheral Mapping:

  • LPUART1 TX/RX : PA2/PA3

  • I2C1 SCL/SDA : PB8/PB7 (Arduino I2C)

  • SPI2 CS/SCK/MISO/MOSI : PA11/PB13/PB14/PB15 (Arduino SPI)

  • UART1 TX/RX : PA9/PA10

  • PWM_2_CH1 : PA0

  • USER_PB : PC13

  • LD4 : PB13

Note: SPI2 CS pin (PB12) is not located on the Arduino connector.

System Clock

Nucleo L412RB-P 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 80MHz, driven by 16MHz high speed internal oscillator.

Serial Port

Nucleo L412RB-P board has 3 U(S)ARTs and 1 LPUART. The Zephyr console output is assigned to LPUART1. Default settings are 115200 8N1.

Programming and Debugging

Nucleo L412RB-P board includes an ST-LINK/V2-1 embedded debug tool interface.

Applications for the nucleo_l412rb_p board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

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

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

$ west flash --runner openocd
$ west flash --runner jlink

Flashing an application to Nucleo L412RB-P

Connect the Nucleo L412RB-P to your host computer using the USB port, then run a serial host program to connect with your Nucleo board.

$ minicom -D /dev/ttyACM0

Now build and flash an application. Here is an example for Hello World.

# From the root of the zephyr repository
west build -b nucleo_l412rb_p samples/hello_world
west flash

You should see the following message on the console:

$ Hello World! nucleo_l412rb_p

Debugging

You can debug an application in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b nucleo_l412rb_p samples/hello_world
west debug