STMicroelectronics STM32F031C4T6TR

Overview

STM32F031C4T6TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 16 KB Flash, 4 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC, and integrated peripherals including I²C, USART, SPI, RTC, and advanced timers - deployed in industrial sensor nodes, smart metering interfaces, and low-power motor control modules.

For engineers reviewing the STM32F031C4T6TR datasheet, STM32F031C4T6TR pinout, STM32F031C4T6TR application, or STM32F031C4T6TR equivalent, key selection criteria include Flash size (16 KB), operating voltage range (2.0–3.6 V), extended temperature support (−40 to +105°C), 5 V-tolerant I/O count (up to 26), and SWD debug interface compatibility.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Harvard bus architecture, supporting Thumb-2 instruction set and NVIC for deterministic interrupt handling. It integrates a programmable voltage detector (PVD), hardware CRC unit, and dual-supply domain (VDD/VDDA) for analog integrity.

Clock management includes four independent sources: HSE (4–32 MHz), LSE (32.768 kHz), HSI (8 MHz RC with PLL), and LSI (40 kHz RC). The 9-timer suite features one advanced-control timer (TIM1) with deadtime generation and emergency stop, plus dedicated IR modulation and LIN/ISO7816-capable USART.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK®2 certified. Pin mapping validated per STMicroelectronics DocID025743 Rev 6, Section 4 (Pinouts and pin description), Figure 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031C4T6TR, STM32F030F4P6 sacrifices analog supply flexibility and voltage range, while STM32F031K4T6 trades I/O count and timer capability for smaller footprint - both require redesign of signal routing, power partitioning, or peripheral allocation.

Availability

STM32F031C4T6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter interfaces, and brushless DC motor controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for STM32F031C4T6TR 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, MEMS, and automotive-grade components.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial temperature resilience - optimized for appliance control, industrial I/O, and sensor edge nodes.

FAQ

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

The STM32F031C4T6TR achieves a maximum CPU frequency of 48 MHz using its internal 8 MHz RC oscillator with a 6× PLL multiplier. Alternatively, an external 4–32 MHz crystal (HSE) can be used with PLL scaling. All timing specifications in the datasheet - including ADC conversion time and I²C Fast-mode Plus - are guaranteed at this 48 MHz system clock.

Does this MCU support hardware encryption or secure boot?

No, the STM32F031C4T6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It relies on software-based security measures. For secure firmware updates or key storage, external secure elements or higher-series STM32G0/L0 parts with TRNG and AES-128 are recommended.

Can the 12-bit ADC operate independently of the main VDD supply?

Yes - the ADC uses a separate analog supply (VDDA), which can be connected to the same 3.3 V rail as VDD or isolated with dedicated filtering. VDDA must be ≥2.4 V and ≤3.6 V, and its voltage directly sets the ADC reference (VREF+). This separation prevents digital switching noise from degrading analog measurement accuracy.

Is the SWD interface compatible with standard ARM debug probes?

Yes, the Serial Wire Debug (SWD) interface is fully compliant with ARM CoreSight standards and works with common debug tools including ST-LINK/v2, J-Link, and CMSIS-DAP adapters. No custom firmware or vendor-specific drivers are required - standard OpenOCD and STM32CubeIDE configurations apply out-of-the-box.