STMicroelectronics STM32F031F4P6TR

Overview

STM32F031F4P6TR from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 16 KB Flash, 4 KB SRAM (HW parity), 48 MHz max CPU frequency, and integrated peripherals including 1×12-bit ADC (1.0 µs), 9 timers (including advanced-control TIM1), and communication interfaces (I²C, USART, SPI). It operates from 2.0–3.6 V and supports -40 to +105°C industrial temperature range, targeting compact embedded control in motor drives and sensor nodes.

For engineers reviewing the STM32F031F4P6TR datasheet, STM32F031F4P6TR pinout, STM32F031F4P6TR application, or STM32F031F4P6TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 26 pins), real-time timer capabilities (deadtime generation, emergency stop), low-power mode behavior (Stop/Standby with RTC wakeup), and TSSOP20 package compatibility for space-constrained PCB layouts.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, supporting deterministic interrupt latency via NVIC and hardware CRC acceleration. 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 trade-offs between accuracy, power, and startup time.

Peripheral integration follows ST's STM32F0 architecture: DMA controller handles memory-to-peripheral transfers without CPU intervention; ADC features separate analog supply (VDDA = 2.4–3.6 V) and internal temperature sensor/VREFINT; and TIM1 provides 6-channel PWM with programmable deadtime and emergency input for motor gate drive safety.

Key Specifications

Pinout & Package

TSSOP20 package (6.5 × 4.4 mm, 0.65 mm pitch), RoHS-compliant and ECOPACK®2 certified, optimized for automated assembly and thermal performance in compact designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031F4P6TR, STM32F030F4P6 sacrifices reliability features (SRAM parity, VREFINT) for lower cost, while STM32G030F6P6 offers architectural upgrades at the expense of pin-level compatibility and increased design validation effort.

Availability

STM32F031F4P6TR is available at Aetrix Electronics and suitable for motor control subsystems, industrial sensor nodes, smart power outlets, and medical diagnostic peripherals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F031F4P6TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad industrial certification coverage.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high reliability, low power, and seamless toolchain integration - particularly in appliance control, industrial automation, and IoT edge nodes.

FAQ

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

The STM32F031F4P6TR achieves 48 MHz maximum CPU frequency using its internal 8 MHz HSI oscillator multiplied by a ×6 PLL. This configuration avoids external crystal cost while maintaining timing accuracy within ±1% over temperature and voltage, validated per datasheet Section 6.3.9. The PLL output feeds the system clock (SYSCLK) directly, with no additional dividers required for full-speed operation.

Does this MCU support in-application programming (IAP) of Flash memory?

Yes, the STM32F031F4P6TR supports IAP via its built-in system memory bootloader, accessible through USART1 using the ST proprietary protocol. Users can reprogram Flash sectors without external debug tools by implementing a custom host application that sends command sequences (e.g., Get, Go, Erase, Write) over UART, leveraging the option bytes and RDP level for security control.

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

Up to 26 I/O pins are 5 V tolerant, specifically all pins in GPIO ports A and B except PA11, PA12, and PB10–PB15 (as defined in datasheet Table 11). Tolerance is guaranteed across the full operating temperature range (-40 to +105°C) and applies only when VDD ≥ 2.0 V; these pins may be safely driven by 5 V logic without external clamping diodes or level shifters.

What debug interface does STM32F031F4P6TR provide and what are its physical requirements?

The device uses Serial Wire Debug (SWD), a 2-pin interface (SWDIO and SWCLK) compliant with ARM CoreSight standards. It requires no target-side pull-ups or external circuitry beyond standard 10 kΩ pull-down on SWDIO for reliable enumeration. SWD supports full read/write memory access, breakpoints, and real-time variable monitoring - all documented in RM0091 Reference Manual Chapter 33.