STMicroelectronics STM32F031C6T6TR

Overview

STM32F031C6T6TR 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 peripherals including TIM1 advanced timer (6-channel PWM + deadtime), RTC, I²C (Fast Mode Plus), USART (LIN/IrDA), and SPI (18 Mbit/s). It targets cost-sensitive industrial control and sensor interface applications requiring extended temperature support (–40 to +105°C).

For engineers reviewing the STM32F031C6T6TR datasheet, STM32F031C6T6TR pinout, STM32F031C6T6TR application, or STM32F031C6T6TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 26), low-power mode behavior (Stop/Standby with RTC wakeup), ADC resolution and sampling speed, and availability of hardware CRC and SWD debug.

Technical Context

The device integrates an ARM Cortex-M0 core with tightly coupled NVIC and SysTick timer, supporting deterministic real-time execution. Its clock system combines internal RC oscillators (8 MHz HSI, 40 kHz LSI), external crystal options (4–32 MHz HSE, 32.768 kHz LSE), and a PLL for precise frequency scaling up to 48 MHz.

Peripheral interconnect uses APB1/APB2 buses with DMA channel arbitration for concurrent data movement across ADC, timers, and communication interfaces. The 12-bit ADC supports up to 10 channels with programmable sampling time and separate analog supply (VDDA = 2.4–3.6 V), while TIM1 provides hardware deadtime insertion and emergency stop for motor control.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK®2 certified. Thermal resistance θ_JA = 50 °C/W (JEDEC standard PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031C6T6TR, STM32F042F6P6 adds USB at the cost of larger package and higher BOM cost, while STM32G031F8P6 offers double Flash/SRAM and security features but requires migration to newer HAL libraries and toolchains.

Availability

STM32F031C6T6TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC digital I/O modules, and home appliance UI controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F031C6T6TR 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 sensors, and automotive-grade components.

This part belongs to the STM32F0 mainstream Arm Cortex-M0 microcontroller family, engineered for cost-sensitive industrial and consumer applications demanding high integration, low power, and robust peripheral sets without sacrificing development ecosystem maturity.

FAQ

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

The STM32F031C6T6TR 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. The PLL output feeds the system clock (SYSCLK), which drives the AHB and APB buses.

Does this MCU support hardware encryption or secure boot?

No, the STM32F031C6T6TR does not include hardware cryptographic accelerators or secure boot circuitry. It lacks AES engines, TRNG, or immutable boot ROM. Security relies on software-based techniques and external secure elements. For hardware security, consider STM32G031 or STM32L5 series parts.

Can the 12-bit ADC measure signals above the VDDA supply voltage?

No. The ADC input voltage range is strictly 0 to VDDA (2.4–3.6 V). Applying signals exceeding VDDA risks damage and violates absolute maximum ratings. For higher-voltage sensing, external resistive dividers or signal conditioners must scale inputs into the valid ADC range before connection.

Is SWD debug supported with full trace capability?

SWD debug is fully supported for programming and real-time variable inspection, but the STM32F031C6T6TR lacks an Embedded Trace Macrocell (ETM) or SWO trace output. Therefore, instruction trace and high-speed data streaming are unavailable; debugging relies on breakpoints, watchpoints, and register reads via SWDIO/SWCLK pins.