STMicroelectronics NUCLEO-G491RE

Overview

NUCLEO-G491RE from STMicroelectronics is an STM32 Nucleo-64 development board built around the STM32G491RET6 32-bit Arm® Cortex®-M4F microcontroller with 512 KB Flash, 128 KB RAM, and operating at up to 170 MHz. It integrates ST-LINK/V3E debugger/programmer via USB Micro-B, features a 24 MHz HSE crystal, MIPI® debug connector, and LQFP64 package. Designed for rapid prototyping of motor control, digital power conversion, and analog signal processing applications.

For engineers reviewing the NUCLEO-G491RE datasheet, NUCLEO-G491RE pinout, NUCLEO-G491RE application, or NUCLEO-G491RE equivalent, this board delivers validated hardware support for STM32CubeIDE, IAR Embedded Workbench®, and Keil MDK-ARM - with ARDUINO® Uno V3 and ST morpho expansion headers enabling shield-based peripheral integration and real-time firmware validation.

Technical Context

The NUCLEO-G491RE implements the STM32G4 series architecture featuring a Cortex-M4F core with FPU and DSP instructions, supporting deterministic real-time execution for closed-loop control. It includes dual ADCs (12-bit, 2.4 MSPS), high-resolution timers (184 ps), and advanced analog peripherals including op-amps and comparators - all accessible via ST morpho headers.

Power architecture supports flexible supply options: ST-LINK USB VBUS, external 5 V, or 3.3 V sources. The board lacks on-board SMPS but enables external SMPS evaluation through dedicated test points, aligning with low-power Run mode optimization strategies defined in STM32G4 reference designs.

Key Specifications

Availability

NUCLEO-G491RE is available at Aetrix Electronics and suitable for industrial motor control prototyping, digital power supply design, embedded analog signal acquisition, and educational embedded systems development requiring stable component supply and long-term toolchain continuity.

Supply support for NUCLEO-G491RE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs with over 40 years of silicon innovation.

The STM32 Nucleo-64 platform - including NUCLEO-G491RE - was designed to accelerate evaluation and firmware development for the STM32G4 series, targeting high-precision analog-digital mixed-signal applications such as digital power converters and real-time motor control systems.

FAQ

Does NUCLEO-G491RE support USB device functionality?

No - the NUCLEO-G491RE does not include a user-accessible USB Device interface. Its USB Micro-B connector serves exclusively for ST-LINK/V3E debugging and programming. Unlike NUCLEO-C562RE or NUCLEO-H533RE, it lacks USB SNK/UFP or USB FS device circuitry on the target MCU side.

What is the difference between NUCLEO-G491RE and NUCLEO-G474RE?

The NUCLEO-G491RE uses the STM32G491RET6 (512 KB Flash, no crypto accelerators), while NUCLEO-G474RE uses STM32G474RET6 (same Flash/RAM but includes AES-128 and HASH accelerators). Both share identical board layout, ST-LINK/V3E, 24 MHz HSE, and LQFP64 packaging - making them pin-compatible for non-crypto firmware migration.

Can the NUCLEO-G491RE be used for CAN FD development?

No - the NUCLEO-G491RE board does not integrate a CAN FD transceiver or expose CAN FD signals on its headers. Boards like NUCLEO-C092RC or NUCLEO-C562RE provide dedicated CAN FD headers and transceivers; the G491RE's target MCU lacks native CAN FD peripheral support in its silicon configuration.

Is external SMPS supported on NUCLEO-G491RE?

Yes - though the board has no on-board SMPS, it provides test points and routing compatible with external SMPS evaluation per STM32G4 reference designs. This enables low-power Run mode testing (<100 µA/MHz) using discrete DC-DC controllers, unlike -P or -Q variants which embed SMPS logic.