ST Nucleo F746ZG

Overview

The STM32 Nucleo-144 boards offer combinations of performance and power that provide an affordable and flexible way for users to build prototypes and try out new concepts. For compatible boards, the SMPS significantly reduces power consumption in Run mode.

The Arduino-compatible ST Zio connector expands functionality of the Nucleo open development platform, with a wide choice of specialized Arduino* Uno V3 shields.

The STM32 Nucleo-144 board does not require any separate probe as it integrates the ST-LINK/V2-1 debugger/programmer.

The STM32 Nucleo-144 board comes with the STM32 comprehensive free software libraries and examples available with the STM32Cube MCU Package.

Key Features

  • STM32 microcontroller in LQFP144 package

  • Ethernet compliant with IEEE-802.3-2002 (depending on STM32 support)

  • USB OTG or full-speed device (depending on STM32 support)

  • 3 user LEDs

  • 2 user and reset push-buttons

  • 32.768 kHz crystal oscillator

  • Board connectors:

  • USB with Micro-AB

  • SWD

  • Ethernet RJ45 (depending on STM32 support)

  • ST Zio connector including Arduino* Uno V3

  • ST morpho

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

  • On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration

  • capability: mass storage, virtual COM port and debug port.

  • Comprehensive free software libraries and examples available with the STM32Cube MCU package.

  • Arm* Mbed Enabled* compliant (only for some Nucleo part numbers)

Nucleo F746ZG

More information about the board can be found at the Nucleo F746ZG website.

Hardware

Nucleo F746ZG provides the following hardware components:

  • STM32F746ZG in LQFP144 package

  • ARM 32-bit Cortex-M7 CPU with FPU

  • Chrom-ART Accelerator

  • ART Accelerator

  • 216 MHz max CPU frequency

  • VDD from 1.7 V to 3.6 V

  • 1 MB Flash

  • 320 KB SRAM

  • 16-bit timers(10)

  • 32-bit timers(2)

  • SPI(6)

  • I2C(4)

  • I2S (3)

  • USART(4)

  • UART(4)

  • USB OTG Full Speed and High Speed(1)

  • USB OTG Full Speed(1)

  • CAN(2)

  • SAI(2)

  • SPDIF_Rx(4)

  • HDMI_CEC(1)

  • Dual Mode Quad SPI(1)

  • Camera Interface

  • GPIO(up to 168) with external interrupt capability

  • 12-bit ADC(3) with 24 channels / 2.4 MSPS

  • 12-bit DAC with 2 channels(2)

  • True Random Number Generator (RNG)

  • 16-channel DMA

  • LCD-TFT Controller with XGA resolution

Supported Features

The Zephyr nucleo_f746zg board configuration supports the following hardware features:

Interface

Controller

Driver/Component

NVIC

on-chip

nested vector interrupt controller

UART

on-chip

serial port

PINMUX

on-chip

pinmux

GPIO

on-chip

gpio

ETHERNET

on-chip

ethernet

USB

on-chip

usb_device

COUNTER

on-chip

rtc

I2C

on-chip

i2c

PWM

on-chip

pwm

SPI

on-chip

spi

WATCHDOG

on-chip

independent watchdog

ADC

on-chip

ADC Controller

DAC

on-chip

DAC Controller

Backup SRAM

on-chip

Backup SRAM

RTC

on-chip

rtc

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

The default configuration can be found in boards/st/nucleo_f746zg/nucleo_f746zg_defconfig

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

Default Zephyr Peripheral Mapping:

The Nucleo F746ZG board features a ST Zio connector (extended Arduino Uno V3) and a ST morpho connector. Board is configured as follows:

  • UART_2 TX/RX/RTS/CTS : PD5/PD6/PD4/PD3

  • UART_3 TX/RX : PD8/PD9 (ST-Link Virtual Port Com)

  • UART_6 TX/RX : PG14/PG9 (Arduino UART)

  • USER_PB : PC13

  • LD1 : PB0

  • LD2 : PB7

  • LD3 : PB14

  • ETH : PA1, PA2, PA7, PB13, PC1, PC4, PC5, PG11, PG13

  • USB DM : PA11

  • USB DP : PA12

  • I2C : PB8, PB9

  • PWM : PE13

  • SPI : PD14, PA5, PA6, PA7

  • ADC1_IN0 : PA0

  • DAC1_OUT1 : PA4

Note. The Arduino Uno v3 specified SPI device conflicts with the on-board ETH device on pin PA7.

System Clock

Nucleo F746ZG System Clock could be driven by an internal or external oscillator, as well as the main PLL clock. By default, the System clock is driven by the PLL clock at 72MHz, driven by an 8MHz high-speed external clock.

Serial Port

Nucleo F746ZG board has 4 UARTs and 4 USARTs. The Zephyr console output is assigned to UART3. Default settings are 115200 8N1.

Backup SRAM

In order to test backup SRAM you may want to disconnect VBAT from VDD. You can do it by removing SB156 jumper on the back side of the board.

Programming and Debugging

Applications for the nucleo_f746zg board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

Nucleo F746ZG board includes an ST-LINK/V2-1 embedded debug tool interface.

Flashing an application to Nucleo F746ZG

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

Alternatively, openocd (provided in Zephyr SDK) or JLink can also be used to flash the board using the --runner (or -r) option:

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

Here is an example for the Hello World application.

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

$ minicom -b 115200 -D /dev/ttyACM0

Build and flash the application:

# From the root of the zephyr repository
west build -b nucleo_f746zg samples/hello_world
west flash

You should see the following message on the console:

$ Hello World! nucleo_f746zg

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_f746zg samples/hello_world
west debug