Nucleo G491RE
Overview
The Nucleo G491RE board features an ARM® Cortex®-M4 based STM32G491RE MCU with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo G491RE board:
STM32 microcontroller in LQFP64 package
Arduino® Uno V3 connectivity
On-board ST-LINK/V3E debugger/programmer with SWD connector
Flexible board power supply:
USB VBUS or external source (3.3 V, 5 V, 7-12 V)
Power management access point
Three LEDs: USB communication (LD1), power LED (LD3), user LED (LD2)
Two push-buttons: RESET and USER
More information about the board can be found at the Nucleo G491RE website.
Hardware
The STM32G491RE SoC provides the following hardware IPs:
Core: ARM® 32-bit Cortex®-M4 CPU with FPU, frequency up to 170 MHz
Clock Sources:
4 to 48 MHz crystal oscillator
32 kHz oscillator with calibration
Internal 16 MHz RC with PLL option (±1%)
Internal 32 kHz RC oscillator (±5%)
RTC with HW calendar, alarms and calibration
15 timers:
1 x 32-bit timer and 2 x 16-bit timers with up to four IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
3 x 16-bit 8-channel advanced motor control timers, with up to 8 x PWM channels, dead time generation and emergency stop
1 x 16-bit timer with 2 x IC/OCs, one OCN/PWM, dead time generation and emergency stop
2 x 16-bit timers with IC/OC/OCN/PWM, dead time generation and emergency stop
2 x watchdog timers (independent, window)
1 x SysTick timer: 24-bit downcounter
2 x 16-bit basic timers
1 x low-power timer
Up to 86 fast I/Os, most 5 V-tolerant
Memories
Up to 512 KB single bank Flash, proprietary code readout protection
Up to 112 KB of SRAM including 32 KB with hardware parity check
Rich analog peripherals (independent supply)
3x 12-bit ADC 5 MSPS, up to 16-bit with hardware oversampling
4x 12-bit DAC, low-power sample and hold
4x operational amplifiers with built-in PGA
4x ultra-fast rail-to-rail analog comparators
18x communication interfaces
2x FDCAN controller supporting flexible data rate
3x I2C FM+ (1 Mbit/s), SMBus/PMBus
5x USARTs (ISO 7816, LIN, IrDA, modem)
1x LPUART
3x SPIs (2x with multiplexed half duplex I2S interface)
1x SAI (serial audio interface)
USB 2.0 full-speed interface with LPM and BCD support
IRTIM (Infrared interface)
USB Type-C® /USB power delivery controller (UCPD)
16-channel DMA controller
True random number generator (RNG)
CRC calculation unit, 96-bit unique ID
Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
More information about STM32G491RE can be found here:
Supported Features
The nucleo_g491re 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_g491re/stm32g491xx target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M4F CPU1 |
|
ADC |
on-chip |
STM32 ADC3 |
|
CAN |
on-chip |
STM32 FDCAN CAN FD controller2 |
|
Clock control |
on-chip |
STM32 RCC (Reset and Clock controller)1 |
|
on-chip |
STM32 HSE Clock1 |
||
on-chip |
|||
on-chip |
STM32 LSE Clock1 |
||
on-chip |
STM32G4 main PLL1 |
||
Comparator |
on-chip |
STM32G4 series Comparator2 |
|
Counter |
on-chip |
STM32 counters11 |
|
CRC |
on-chip |
STM32 CRC calculation unit1 |
|
DAC |
on-chip |
||
DMA |
on-chip |
STM32 DMA controller (V2)2 |
|
on-chip |
STM32 DMAMUX controller1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
GPIO & Headers |
on-chip |
STM32 GPIO Controller7 |
|
on-board |
GPIO pins exposed on Arduino Uno (R3) headers1 |
||
on-board |
GPIO pins exposed on ST Morpho connector1 |
||
I2C |
on-chip |
||
I2S |
on-chip |
STM32 SAI controller2 |
|
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
on-board |
Group of PWM-controlled LEDs1 |
||
MTD |
on-chip |
STM32 flash memory1 |
|
NVMEM |
on-chip |
Fixed layout for Non-Volatile memory1 |
|
OPAMP |
on-chip |
STM32G4 OPAMP3 |
|
OTP memory |
on-chip |
||
PHY |
on-chip |
This binding is to be used by all the usb transceivers which are built-in with USB IP1 |
|
Pin control |
on-chip |
STM32 Pin controller1 |
|
PWM |
on-chip |
||
QSPI |
on-chip |
STM32 QSPI Controller1 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
Sensors |
on-chip |
STM32 quadrature decoder6 |
|
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
||
on-chip |
STM32 VREF+1 |
||
on-chip |
STM32 VBAT1 |
||
Serial controller |
on-chip |
||
on-chip |
STM32 UART2 |
||
on-chip |
STM32 LPUART1 |
||
SMbus |
on-chip |
STM32 SMBus controller3 |
|
SPI |
on-chip |
STM32 SPI controller with embedded Rx and Tx FIFOs3 |
|
USB Type-C Port Controller |
on-chip |
STM32 USB Type-C / Power Delivery1 |
|
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
STM32 low-power timer (LPTIM)1 |
||
on-chip |
|||
USB |
on-chip |
STM32 USB controller1 |
|
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
Connections and IOs
Nucleo G491RE board has 6 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to STM32G4 Nucleo-64 board User Manual.
Default Zephyr Peripheral Mapping:
UART_1_TX : PC4
UART_1_RX : PC5
LPUART_1_TX : PA2
LPUART_1_RX : PA3
I2C_1_SCL : PB8
I2C_1_SDA : PB9
SPI_1_NSS : PB6
SPI_1_SCK : PA5
SPI_1_MISO : PA6
SPI_1_MOSI : PA7
SPI_2_NSS : PB12
SPI_2_SCK : PB13
SPI_2_MISO : PB14
SPI_2_MOSI : PB15
SPI_3_NSS : PA15
SPI_3_SCK : PC10
SPI_3_MISO : PC11
SPI_3_MOSI : PC12
PWM_3_CH1 : PB4
USER_PB : PC13
LD2 : PA5
DAC1_OUT1 : PA4
System Clock
Nucleo G491RE 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 150 MHz, driven by 16 MHz high speed internal oscillator. The clock can be boosted to 170 MHz if boost mode is selected.
Serial Port
Nucleo G491RE board has 5 U(S)ARTs and one LPUART. The Zephyr console output is assigned to LPUART1. Default settings are 115200 8N1.
Please note that LPUART1 baudrate is limited to 9600 if the MCU is clocked by LSE (32.768 kHz) in low power mode.
Programming and Debugging
The nucleo_g491re board supports the runners and associated west commands listed below.
| flash | debug | attach | rtt | debugserver | reset | |
|---|---|---|---|---|---|---|
| jlink | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| openocd | ✅ | ✅ | ✅ | ✅ | ✅ | |
| pyocd | ✅ | ✅ (default) | ✅ | ✅ | ✅ | |
| stm32cubeprogrammer | ✅ (default) |
Nucleo G491RE board includes an ST-LINK/V3E embedded debug tool interface.
Applications for the nucleo_g491re 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 pyOCD can also be used to flash the board using
the --runner (or -r) option:
$ west flash --runner openocd
$ west flash --runner pyocd
pyOCD can be used after adding “pack” support with the following commands:
$ pyocd pack --update
$ pyocd pack --install stm32g491re
Flashing an application to Nucleo G491RE
Connect the Nucleo G491RE 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_g491re samples/hello_world
west flash
You should see the following message on the console:
$ Hello World! arm
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_g491re samples/hello_world
west debug