STMicroelectronics STM32G031F4P3

Overview

STM32G031F4P3 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 16 KB Flash, 8 KB SRAM, 12-bit ADC (0.4 µs conversion), two USARTs (one with LIN/IrDA/ISO7816), and operates from 1.7–3.6 V across –40°C to 85°C. It integrates a 16 MHz internal RC oscillator (±1 %), programmable Brownout reset, and 28-pin TSSOP package - deployed in smart sensor nodes and industrial control edge devices requiring compact footprint and low-power operation.

For engineers reviewing the STM32G031F4P3 datasheet, STM32G031F4P3 pinout, STM32G031F4P3 application, or STM32G031F4P3 equivalent, key selection criteria include its 28-pin TSSOP package compatibility, 16 KB Flash memory size, dual USART support with LIN capability, 12-bit ADC performance at 1 Msps, and verified operation down to 1.7 V supply voltage for battery-backed systems.

Technical Context

The STM32G031F4P3 implements an Arm Cortex-M0+ core with MPU, supporting up to 64 MHz CPU frequency via PLL from internal 16 MHz RC or external crystal. Its memory subsystem includes 16 KB of securable Flash with readout protection and 8 KB SRAM with hardware parity checking - enabling robust firmware integrity in resource-constrained embedded applications.

Clock architecture integrates four independent sources: 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1 %), and 32 kHz LSI (±5 %), all feeding a flexible clock tree with prescalers and multiplexers. Peripheral interconnect uses a dedicated AHB/APB matrix, allowing concurrent DMA transfers (5-channel controller) and deterministic interrupt latency via NVIC with 32 external interrupts.

Key Specifications

Pinout & Package

TSSOP20 (YA) package: 20-pin thin shrink small outline package, 6.4 × 4.4 mm body, 0.65 mm pitch, lead-free and RoHS-compliant (ECOPACK2). Pin count and I/O mapping match STM32G031F4P3's 18 GPIOs (including 5V-tolerant), NRST, VDD/VSS, VREF+, VBAT, and SWDIO/SWCLK debug pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031F4P3, STM32G030F6P6 reduces BOM cost by omitting VREFBUF but sacrifices ADC reference stability; LPC802M011JDH20 offers comparable core performance but lacks critical automotive-grade peripherals, limiting deployment in LIN-connected systems.

Availability

STM32G031F4P3 is available at Aetrix Electronics and suitable for smart metering nodes, industrial sensor hubs, white goods control panels, and medical wearable monitors requiring stable component supply, long-term lifecycle assurance, and ECOPACK2 environmental compliance.

Supply support for STM32G031F4P3 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, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications requiring Arm Cortex-M0+ performance with enhanced security, analog integration, and simplified development - optimized for rapid time-to-market in battery-operated and space-constrained designs.

FAQ

What is the maximum operating frequency of the STM32G031F4P3?

The STM32G031F4P3 achieves a maximum CPU frequency of 64 MHz using its internal 16 MHz RC oscillator with PLL multiplication. This frequency is fully supported across the full operating voltage range (1.7–3.6 V) and temperature range (–40°C to +85°C), as validated in DS12992 Rev 4 Section 5.3.9.

Does the STM32G031F4P3 support hardware encryption or secure boot?

The STM32G031F4P3 does not integrate AES or PKA accelerators, but supports secure boot via readout protection (ROP) Level 1/2, securable Flash area, and option bytes lock. Boot from system memory or user Flash can be restricted, and debug access disabled - meeting IEC 62443-3-3 SL1 requirements for basic firmware integrity.

Can the STM32G031F4P3 drive 5 V logic directly?

Yes - 16 of its 18 GPIOs are 5 V-tolerant (FT_e class) when VDD is ≥ 2.0 V, per Section 5.3.14 of DS12992 Rev 4. This allows direct interfacing with legacy 5 V peripherals like RS-232 transceivers or industrial PLC I/O modules without external level shifters.

What debug interface does the STM32G031F4P3 use?

The STM32G031F4P3 uses Serial Wire Debug (SWD) via dedicated PA13 (SWDIO) and PA14 (SWCLK) pins. It supports full-speed programming, real-time variable inspection, and breakpoint debugging through standard tools including ST-LINK/V2, SEGGER J-Link, and OpenOCD - no JTAG header required.