ST Nucleo L496ZG


The Nucleo L496ZG board features an ARM Cortex-M4 based STM32L496ZG MCU with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo L476ZG board:

  • STM32 microcontroller in QFP144 package

  • USB OTG FS with Micro-AB connector

  • 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/V2-1 debugger/programmer with SWD connector

  • Flexible board power supply:

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

    • Power management access point

  • 8 LEDs: user LEDs (LD1, LD2, LD3), communication LED (LD4), USB power fault(LD5), power LED (LD6), USB FS OTG (LD7, LD8)

  • 2 push buttons: USER and RESET

Nucleo L496ZG

More information about the board can be found at the Nucleo L496ZG website.


The STM32L496ZG SoC provides the following hardware capabilities:

  • Ultra-low-power with FlexPowerControl (down to 108 nA Standby mode and 91 uA/MHz run mode)

  • Core: ARM® 32-bit Cortex®-M4 CPU with FPU, frequency up to 80 MHz, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1)

  • 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)

    • 3 PLLs for system clock, USB, audio, ADC

  • RTC with HW calendar, alarms and calibration

  • LCD 8 x 40 or 4 x 44 with step-up converter

  • Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors

  • 16x timers:

    • 2x 16-bit advanced motor-control

    • 2x 32-bit and 5x 16-bit general purpose

    • 2x 16-bit basic

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

    • 2x watchdogs

    • SysTick timer

  • Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V

  • Memories

    • Up to 1 MB Flash, 2 banks read-while-write, proprietary code readout protection

    • Up to 320 KB of SRAM including 64 KB with hardware parity check

    • External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories

    • Quad SPI memory interface

  • 4x digital filters for sigma delta modulator

  • Rich analog peripherals (independent supply)

    • 3x 12-bit ADC 5 MSPS, up to 16-bit with hardware oversampling, 200 uA/MSPS

    • 2x 12-bit DAC, low-power sample and hold

    • 2x operational amplifiers with built-in PGA

    • 2x ultra-low-power comparators

  • 20x communication interfaces

    • USB OTG 2.0 full-speed, LPM and BCD

    • 2x SAIs (serial audio interface)

    • 4x I2C FM+(1 Mbit/s), SMBus/PMBus

    • 5x U(S)ARTs (ISO 7816, LIN, IrDA, modem)

    • 1x LPUART

    • 3x SPIs (4x SPIs with the Quad SPI)

    • 2x CAN (2.0B Active) and SDMMC interface

    • SWPMI single wire protocol master I/F

    • 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™

More information about STM32L496ZG can be found here:

Supported Features

The Zephyr nucleo_l496zg board configuration supports the following hardware features:






nested vector interrupt controller



serial port-polling; serial port-interrupt





















System Window Watchdog

Other hardware features are not yet supported on this Zephyr port.

The default configuration can be found in the defconfig file: boards/arm/nucleo_l496zg/nucleo_l496zg_defconfig

Connections and IOs

Nucleo L496ZG Board has 8 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For mode details please refer to STM32 Nucleo-144 board User Manual.

Default Zephyr Peripheral Mapping:

  • UART_2 TX/RX : PD5/PD6

  • UART_3 TX/RX : PD8/PD9

  • LPUART_1 TX/RX : PG7/PG8

  • PWM_1_CH1: PE9

  • PWM_1_CH2: PE11

  • PWM_1_CH3: PE13

  • PWM_2_CH1: PA0

  • I2C_1_SCL: PB8

  • I2C_1_SDA: PB7

  • SPI_1_NSS: PD14

  • SPI_1_SCK: PA5

  • SPI_1_MISO: PA6

  • SPI_1_MOSI: PA7

  • USER_PB : PC13

  • LD1 : PC7

  • LD2 : PB7

  • LD3 : PB14

System Clock

Nucleo L496ZG 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 L496ZG board has 5 U(S)ARTs. The Zephyr console output is assigned to UART2. Default settings are 115200 8N1.

Programming and Debugging

Applications for the nucleo_l496zg board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).


Nucleo L496ZG board includes an ST-LINK/V2-1 embedded debug tool interface. This interface is supported by the openocd version included in the Zephyr SDK since v0.9.5.

Flashing an application to Nucleo L496ZG

Connect the Nucleo L496ZG 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/ttyUSB0

Then build and flash the application.

# From the root of the zephyr repository
west build -b nucleo_l496zg samples/hello_world
west flash

You should see the following message on the console:

Hello World! arm


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_l496zg samples/hello_world
west debug