STMicroelectronics STM32F031G6U7TR

Overview

STM32F031G6U7TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB Flash, 4 KB SRAM with hardware parity, 48 MHz max CPU frequency, 12-bit ADC (1.0 µs conversion), and integrated peripherals including I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), SPI/I²S, and nine timers - deployed in industrial motor control, smart sensor nodes, and battery-powered IoT edge devices.

For engineers reviewing the STM32F031G6U7TR datasheet, STM32F031G6U7TR pinout, STM32F031G6U7TR application, or STM32F031G6U7TR equivalent, key selection criteria include its 5 V-tolerant I/Os (up to 26 pins), programmable voltage detector (PVD), RTC with alarm/wakeup from Stop/Standby, SWD debug interface, and extended temperature range (–40 to +105 °C).

Technical Context

The device implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC for deterministic interrupt handling. Its clock system integrates multiple sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, 8 MHz HSI with PLL (×6), and 40 kHz LSI for watchdogs - enabling flexible low-power operation with precise timing control.

Peripherals are tightly coupled via AHB/APB buses: DMA controller (5 channels) offloads data movement between ADC, USART, SPI, and memory; advanced-control timer TIM1 delivers 6-channel PWM with deadtime insertion and emergency stop - critical for BLDC motor gate driving; ADC supports up to 10 channels with internal reference (VREFINT) and temperature sensor calibration.

Key Specifications

Pinout & Package

STM32F031G6U7TR uses a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package, 5 × 5 mm, 0.5 mm pitch, with exposed thermal pad. Pin functions conform to STM32F031x6 family layout per ST DocID025743 Rev 6, Figure 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G6U7TR, STM32F030F4P6 trades safety features and motor control capability for lower cost and smaller footprint, while STM32F042F4P6 adds USB at the expense of 5 V I/O compatibility - making the G6U7TR optimal for industrial edge nodes requiring robust analog/motor interfaces and extended temperature operation.

Availability

STM32F031G6U7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, energy metering interfaces, and home appliance control panels requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F031G6U7TR 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.

This part belongs to the STM32F0 mainstream Arm Cortex-M0 microcontroller line, engineered for cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial-grade reliability - especially where motor control, sensor fusion, or secure timekeeping are central.

FAQ

What is the maximum operating frequency and supported clock sources?

The STM32F031G6U7TR operates at up to 48 MHz using its internal 8 MHz HSI oscillator with PLL (×6), or external 4–32 MHz crystal (HSE). It also supports 32 kHz LSE for RTC and 40 kHz LSI for watchdogs - all configurable via RCC registers without external components.

Does this MCU support hardware error detection in memory?

Yes - it includes hardware parity checking on the entire 4 KB SRAM block. Any parity error triggers a HardFault exception, enabling fail-safe response in safety-aware designs. Flash memory supports read-while-write and has 10K write/erase cycle endurance per sector.

How many I/O pins are 5 V tolerant, and which ones?

Up to 26 I/Os are 5 V tolerant, covering most pins in GPIOA and GPIOB (e.g., PA0–PA15, PB0–PB9 except PB10/PB11). Tolerance is valid only when VDD is ≥ 2.0 V; full functionality requires VDD within 2.0–3.6 V per datasheet Section 6.3.14.

Can the device wake from Stop mode using the RTC alarm?

Yes - the integrated calendar RTC supports alarm events and periodic wakeup from both Stop and Standby modes. Wakeup latency is typically 6 µs (from Stop) and does not require Flash or SRAM retention, enabling ultra-low-power operation with precise scheduling.