STMicroelectronics STM32F031G6U6TR

Overview

STM32F031G6U6TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 32 KB Flash, 4 KB SRAM (with hardware parity), and operating voltage range of 2.0–3.6 V. It integrates a 12-bit 1.0 µs ADC (10-channel), nine timers including one advanced-control timer with deadtime generation, and communication interfaces: I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), and SPI (18 Mbit/s). It targets cost-sensitive industrial control and smart sensor nodes.

For engineers reviewing the STM32F031G6U6TR datasheet, STM32F031G6U6TR pinout, STM32F031G6U6TR application, or STM32F031G6U6TR equivalent, key selection considerations include its 32-pin UFQFPN package, 48 MHz max CPU frequency, 5 V-tolerant I/Os (up to 26 pins), RTC with alarm/wakeup, and SWD debug interface - all critical for compact, low-power embedded designs requiring mixed-signal integration and real-time responsiveness.

Technical Context

The device implements a tightly coupled ARM Cortex-M0 core with Harvard bus architecture, supporting Thumb-2 instruction set and nested vectored interrupt controller (NVIC) for deterministic real-time response. Its clock system combines internal RC oscillators (8 MHz HSI with PLL, 40 kHz LSI) and external sources (4–32 MHz HSE, 32.768 kHz LSE), enabling flexible power/performance trade-offs across Sleep, Stop, and Standby modes.

Peripheral integration follows ST's STM32F0-series architecture: DMA controller (5 channels) offloads data movement between ADC, timers, and memory; GPIOs support remappable alternate functions and external interrupt capability on all pins; analog subsystem includes dedicated VDDA supply (2.4–3.6 V), temperature sensor, and VREFINT for precise ADC reference calibration.

Key Specifications

Pinout & Package

STM32F031G6U6TR uses a 5 × 5 mm UFQFPN32 (Ultra-Fine Pitch Quad Flat No-lead) package with 0.5 mm pitch, optimized for space-constrained PCB layouts and automated assembly. Thermal pad enhances thermal dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G6U6TR, STM32F030F4P6 sacrifices RTC and package I/O count for lower cost, while STM32F042F4P6 adds USB/CEC at comparable price - making the G6U6TR optimal for RTC-dependent, space-constrained industrial nodes needing robust analog integration and minimal external components.

Availability

STM32F031G6U6TR is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, IoT sensor nodes, and automotive body electronics requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F031G6U6TR 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 devices for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial-grade reliability - with the F031 subgroup optimized for compact 32-pin packages and mixed-signal control tasks.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F031G6U6TR operates at up to 48 MHz using its internal 8 MHz HSI oscillator with PLL multiplication or external crystal. Its digital supply (VDD) ranges from 2.0 V to 3.6 V, and analog supply (VDDA) spans 2.4 V to 3.6 V - ensuring stable ADC performance and core operation across wide battery discharge profiles.

Does this MCU support hardware CRC and what is its implementation?

Yes, it includes a dedicated CRC calculation unit compliant with CRC-32 (IEEE 802.3). The peripheral computes checksums over memory blocks or data streams in hardware with single-cycle throughput, accessible via APB bus. It supports programmable polynomial and initial value - used for firmware image verification and communication packet integrity checking.

How many I/O pins are 5 V tolerant and which packages support them?

Up to 26 I/O pins are 5 V tolerant across all STM32F031x6 variants, including the UFQFPN32 package of STM32F031G6U6TR. This feature is implemented at silicon level and does not require external clamping - confirmed in Section 6.3.14 of the datasheet (DocID025743 Rev 6, page 64).

What debug interface is available and what are its physical requirements?

It supports Serial Wire Debug (SWD) only - a 2-pin interface (SWDIO and SWCLK) with optional SWO for trace output. No JTAG pins are exposed. A 10 kΩ pull-up on SWDIO and clean 3.3 V supply to the debugger target connector are required; ST-LINK/V2-1 or equivalent programmers are fully compatible per UM1727 documentation.