STMicroelectronics STM32G031G6U6

Overview

STM32G031G6U6 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller in UFQFPN28 package, operating up to 64 MHz with 64 KB Flash and 8 KB SRAM. It integrates dual USARTs (one with ISO7816/LIN/IrDA), two I²C interfaces (Fast-mode Plus), two SPIs, 12-bit ADC (0.4 µs conversion), RTC with alarm, and low-power modes including Stop/Standby/Shutdown - deployed in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the STM32G031G6U6 datasheet, STM32G031G6U6 pinout, STM32G031G6U6 application, or STM32G031G6U6 equivalent, key selection criteria include its 64 MHz Cortex-M0+ core, 5 V-tolerant GPIOs, 1.7–3.6 V supply range, integrated VREFBUF and temperature sensor, and SWD debug support for rapid firmware validation.

Technical Context

The STM32G031G6U6 implements a single-core Arm Cortex-M0+ with MPU, supporting TrustZone-like memory protection via readout protection (RDP) levels and securable flash area. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz HSI (±1%) with PLL for precise timing control across mixed-signal applications.

Peripheral interconnect uses dedicated routing matrices: DMA controller supports 5 channels with flexible peripheral-to-memory mapping, while EXTI handles up to 44 GPIOs as external interrupt sources. The ADC features hardware oversampling (up to 16-bit effective resolution) and simultaneous sampling on up to 16 external channels with VBAT monitoring capability.

Key Specifications

Pinout & Package

STM32G031G6U6 is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad. Pin assignments follow ST's standard STM32G031x6 pinout for UFQFPN28 (A0B0), validated per DS12992 Rev 4 Section 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32G030F6P6, the STM32G031G6U6 adds VREFBUF, securable flash, and temperature sensor - critical for certified metering; versus LPC802M011JDH20, it delivers 2.1× higher CPU speed, 4× more Flash, and superior analog subsystem integration for sensor-rich edge nodes.

Availability

STM32G031G6U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, white goods motor control, and IoT edge gateways requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G031G6U6 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, low-power embedded applications demanding high integration, security, and industrial temperature resilience - optimized for smart home, industrial automation, and metering markets.

FAQ

Does STM32G031G6U6 support USB connectivity?

No, the STM32G031G6U6 does not integrate a USB peripheral. It relies on external USB-to-UART bridges (e.g., CP2102, FT232RL) for host communication. This design reduces silicon cost and power consumption while maintaining compatibility with standard development tools via its dual USARTs and SWD interface.

What is the maximum operating temperature grade for STM32G031G6U6 in UFQFPN28 package?

The STM32G031G6U6 in UFQFPN28 (A0B0) package is qualified for industrial temperature range: –40°C to +85°C. Extended grades (–40°C to +105°C and –40°C to +125°C) apply only to specific variants like STM32G031K8T6 in LQFP32, not this part number.

Can the internal 16 MHz RC oscillator be used as system clock without calibration?

Yes - the HSI16 oscillator operates at 16 MHz ±1% over full temperature and voltage range without external calibration. It can serve as default system clock at power-on or during HSE startup delay, and feeds the PLL for 64 MHz operation without crystal dependency.

Is SWD debug supported on all UFQFPN28 pins of STM32G031G6U6?

SWD requires only three dedicated pins: SWCLK (PA14), SWDIO (PA13), and NRST (pin 1). These are fixed-function and cannot be remapped. All other UFQFPN28 pins retain their default or alternate functions independently - no conflict arises between SWD and peripheral use.