STMicroelectronics STM32F031C6T7

Overview

STM32F031C6T7 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), up to 9 timers including advanced-control TIM1 with deadtime generation, and communication interfaces: I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), and SPI (18 Mbit/s). It is used in industrial sensor nodes requiring low-power operation and precise timing control.

For engineers reviewing the STM32F031C6T7 datasheet, STM32F031C6T7 pinout, STM32F031C6T7 application, or STM32F031C6T7 equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 26), extended temperature support (−40 to +105°C), and integrated RTC with alarm/wakeup from Stop/Standby modes.

Technical Context

The STM32F031C6T7 implements a single-cycle ARM Cortex-M0 core running at up to 48 MHz, supported by an internal 8 MHz RC oscillator with PLL multiplication and external 4–32 MHz crystal options. Its clock tree includes dedicated 32 kHz LSE for RTC calibration and independent 40 kHz LSI for watchdogs.

Power architecture features programmable voltage detector (PVD), POR/PDR reset logic, and three low-power modes (Sleep, Stop, Standby) with VBAT backup for RTC and registers. Analog supply (VDDA) is decoupled and supports 2.4–3.6 V, enabling stable ADC conversion across full VDD range.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin quad flat profile, RoHS-compliant and ECOPACK®2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031C6T7, STM32F030F4P6 reduces memory and peripheral capability for lower BOM cost, while STM32F042F6P6 adds USB at the expense of 5 V tolerance - making STM32F031C6T7 optimal for industrial I/O-rich, mixed-voltage embedded control.

Availability

STM32F031C6T7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, medical infusion pumps, and POS peripheral controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32F031C6T7 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, MEMS, and automotive semiconductors since 1987.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding robust real-time performance, low power, and industrial-grade reliability - optimized for sensor fusion, motor control, and human-machine interface subsystems.

FAQ

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

The STM32F031C6T7 achieves 48 MHz maximum CPU frequency using its internal 8 MHz RC oscillator multiplied by a 6× PLL, or via external 4–32 MHz crystal oscillator feeding the PLL. The PLL output drives the system clock (SYSCLK), and all peripherals derive clocks from this source with configurable prescalers. No external clock source is required for full-speed operation.

Does the device support hardware CRC for firmware integrity verification?

Yes, the STM32F031C6T7 includes a dedicated CRC calculation unit compliant with CRC-32 (IEEE 802.3). It operates independently of the CPU, accepts data via APB bus writes, and supports programmable polynomial (default 0x04C11DB7). This enables fast, deterministic checksum generation for firmware image validation during boot or OTA updates.

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

Up to 26 I/O pins are 5 V tolerant, including all pins of GPIOA and GPIOB except PA13 (SWDIO), PA14 (SWCLK), and PB6–PB7 (I²C1_SCL/SDA). Tolerance is valid when VDD is ≥2.0 V and applies to both input and output states - allowing safe interfacing with 5 V logic without external level shifters in mixed-voltage systems.

What debug interface does the STM32F031C6T7 provide and what are its capabilities?

The device provides Serial Wire Debug (SWD) interface using SWDIO and SWCLK pins. It supports full JTAG-equivalent functionality - including halt/resume, register read/write, memory access, flash programming, and real-time variable monitoring - with only two pins and lower pin count than JTAG. SWD is enabled by default and does not require configuration in code.