STMicroelectronics STM32F031C6T7TR

Overview

STM32F031C6T7TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in LQFP32 package, operating up to 48 MHz with 32 KB Flash, 4 KB SRAM (HW parity), 12-bit ADC (1.0 µs conversion), and integrated RTC with alarm. It supports 2.0–3.6 V supply, -40 to +105°C extended temperature range, and targets low-cost industrial control, sensor nodes, and smart peripherals.

For engineers reviewing the STM32F031C6T7TR datasheet, STM32F031C6T7TR pinout, STM32F031C6T7TR application, or STM32F031C6T7TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 26), timer architecture (including advanced-control TIM1 with deadtime), ADC resolution and speed, and availability of SWD debug interface.

Technical Context

The device integrates an ARM Cortex-M0 core with single-cycle multiplication and hardware divide, coupled with a flexible clock tree featuring internal 8 MHz RC (with x6 PLL), 4–32 MHz HSE, and 32 kHz LSE for RTC calibration. Power management includes POR/PDR, programmable voltage detector (PVD), and three low-power modes (Sleep, Stop, Standby) with VBAT support for RTC and backup registers.

Peripherals are tightly synchronized via AHB/APB buses: 9 timers include one 16-bit advanced-control timer (TIM1) with 6-channel PWM, deadtime generation, and emergency stop; one 32-bit general-purpose timer (TIM2); and four additional 16-bit timers supporting IR decoding, modulation, and watchdog functions. Communication interfaces comprise one I²C (Fast Mode Plus, 1 Mbit/s), one USART (LIN/IrDA/ISO7816), and one SPI (18 Mbit/s) with I²S multiplexing.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed pad for thermal performance. Pin count and layout optimized for compact PCB designs requiring mixed-signal integration and minimal external components.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031C6T7TR, STM32F030F4P6 trades advanced peripherals and memory safety for lower cost and smaller footprint, while STM32F042F4P6 adds USB at the expense of 5 V I/O compatibility-making the C6T7TR optimal for robust, mixed-signal industrial control where both precision timing and interface flexibility are required.

Availability

STM32F031C6T7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, POS peripherals, and home appliance UI panels requiring stable component supply, long-term lifecycle assurance, and extended temperature operation.

Supply support for STM32F031C6T7TR 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 STM32F0 series delivers entry-level Cortex-M0 performance with rich analog integration and industrial-grade reliability, targeting cost-sensitive embedded applications requiring robustness, low power, and ease of certification.

FAQ

What is the maximum operating frequency and supported clock sources?

The STM32F031C6T7TR operates at up to 48 MHz using its internal 8 MHz RC oscillator with x6 PLL, or from external 4–32 MHz HSE crystal. It also supports 32 kHz LSE for RTC and internal 40 kHz LSI for watchdog timing. All clock sources are configurable via RCC registers and validated per datasheet Table 38 (PLL) and Table 33–34 (oscillator characteristics).

Does this MCU support hardware CRC and memory parity?

Yes - it includes a dedicated CRC calculation unit supporting CRC-32 polynomial (0x04C11DB7) for firmware image verification, and SRAM is implemented with hardware parity checking enabled by default at reset. Parity errors trigger HardFault, enabling fail-safe detection in safety-critical applications per Section 3.4 and 3.5.3 of the datasheet.

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

Up to 26 I/Os are 5 V tolerant, including all pins of GPIOA and GPIOB except PA11/PA12 (USB-related) and PB6/PB7 (I²C). Specific mapping is defined in Table 11 (Pin definitions) and confirmed in electrical characteristics Section 6.3.14 - tolerance applies only when VDD ≥ 2.0 V and does not extend to analog inputs or reset pin.

Is SWD debug supported, and what pins are required?

Yes - Serial Wire Debug (SWD) is fully supported using SWDIO (PA13) and SWCLK (PA14) pins, with optional SWO (PA15) for trace output. No JTAG header is needed; standard 2-wire connection enables full flash programming, breakpoint setting, and real-time register inspection as documented in Section 3.16 and RM0091 reference manual.