STMicroelectronics STM32F031G4U7TR

Overview

STM32F031G4U7TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 16 KB Flash, 4 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (1.0 µs conversion), and integrated RTC. It operates from 2.0–3.6 V and supports -40 to +105°C industrial temperature range, targeting compact embedded control in motor drives, sensor nodes, and smart peripherals.

For engineers reviewing the STM32F031G4U7TR datasheet, STM32F031G4U7TR pinout, STM32F031G4U7TR application, or STM32F031G4U7TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 26), low-power mode wakeup timing, ADC resolution and speed, and TSSOP20 package compatibility for space-constrained PCB layouts.

Technical Context

The device integrates a single-cycle ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt vectors. Its clock system combines internal RC oscillators (8 MHz HSI, 40 kHz LSI), external crystal options (4–32 MHz HSE, 32.768 kHz LSE), and a PLL for precise 48 MHz system clock derivation.

Peripheral subsystems include one 12-bit ADC with 10 input channels and hardware-calibrated VREFINT/temperature sensor, five independent timers (including advanced-control TIM1 with deadtime generation), and three communication interfaces: I²C (Fast Mode Plus, 1 Mbit/s), USART (with LIN/IrDA/ISO7816), and SPI (18 Mbit/s with I²S multiplexing).

Key Specifications

Pinout & Package

STM32F031G4U7TR uses the TSSOP20 (6.5 × 4.4 mm) package with 20-pin surface-mount footprint optimized for automated assembly and thermal reliability in high-density designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031G4U7TR, STM32F030F4P6 sacrifices RTC and DMA for lower BOM cost, while STM32F042F4P6 adds USB 2.0 FS at no Flash/SRAM penalty - making it ideal for human-interface peripherals requiring native USB enumeration.

Availability

STM32F031G4U7TR is available at Aetrix Electronics and suitable for motor control, industrial sensor nodes, smart power outlets, and POS peripheral controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F031G4U7TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, ultra-low power, and industrial-grade reliability - with the F031 subgroup optimized for TSSOP and UFQFPN packages in sub-20-pin footprints.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F031G4U7TR achieves a maximum 48 MHz system clock using its internal 8 MHz HSI oscillator multiplied by a 6× PLL. This configuration avoids external crystals while maintaining timing precision for USB-free applications. The PLL output feeds the AHB prescaler, and all peripherals derive clocks from this source with configurable dividers.

Does this MCU support hardware encryption or secure boot?

No, the STM32F031G4U7TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot features. It lacks a dedicated TRNG, memory protection unit (MPU), or tamper-detection circuitry. Security relies on software-based implementations and external secure elements if required for authentication or firmware integrity verification.

Can the 12-bit ADC operate simultaneously with other peripherals?

Yes, the ADC can operate concurrently with most peripherals: its conversion triggers can be sourced from TIM1/TRGO, TIM2/TRGO, or software, and DMA channel 1 automatically transfers results to memory without CPU intervention. However, simultaneous use of ADC and high-bandwidth SPI/I²C may require careful priority arbitration in the NVIC to avoid sample loss during burst transfers.

What debug interface is supported and what tools are compatible?

The STM32F031G4U7TR supports Serial Wire Debug (SWD) via dedicated SWDIO and SWCLK pins. It is fully compatible with ST-LINK/V2 and V3 debug probes, as well as third-party tools like J-Link and CMSIS-DAP adapters. No JTAG header is required, reducing PCB footprint; debugging works out-of-box with STM32CubeIDE, Keil MDK, and IAR Embedded Workbench.