STMicroelectronics STM32F031C6T6

Overview

STM32F031C6T6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 32 KB Flash, 4 KB SRAM (HW parity), 48 MHz max CPU frequency, 12-bit 1.0 µs ADC (10 channels), and integrated peripherals including I²C (Fast Mode Plus), USART (LIN/IrDA/ISO7816), SPI (18 Mbit/s), RTC, and 9 timers - deployed in industrial sensor nodes and motor control subsystems.

For engineers reviewing the STM32F031C6T6 datasheet, STM32F031C6T6 pinout, STM32F031C6T6 application, or STM32F031C6T6 equivalent, key selection criteria include 5 V-tolerant I/O count (up to 26 pins), extended temperature range (–40 to +105°C), ECOPACK®2 compliance, and SWD debug interface support.

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, tightly coupled NVIC and SysTick timer, and supports boot from system memory, main Flash, or SRAM. Memory subsystem includes error-detecting SRAM parity and CRC calculation unit for firmware integrity verification.

Clock architecture integrates multiple sources: 4–32 MHz HSE crystal oscillator, 32 kHz LSE for RTC, 8 MHz HSI with x6 PLL (up to 48 MHz), and 40 kHz LSI for watchdog timing - enabling flexible low-power mode transitions (Sleep/Stop/Standby) with sub-5 µs wakeup from Stop mode.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin quad flat profile - compatible with standard reflow assembly and manual inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F031C6T6, the F030F4P6 sacrifices advanced timer and I/O tolerance for lower cost, while the G031F8P6 adds security and memory headroom at slightly higher unit price - making the F031C6T6 optimal for cost-constrained, analog-rich embedded control where legacy ecosystem compatibility is critical.

Availability

STM32F031C6T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and home appliance control requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F031C6T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-efficient embedded applications demanding high integration, low power, and industrial-grade reliability - with the F031 variant optimized for compact control systems requiring rich analog and communication peripherals in minimal footprint.

FAQ

What is the maximum operating frequency of the STM32F031C6T6?

The STM32F031C6T6 achieves a maximum CPU clock frequency of 48 MHz using its internal 8 MHz HSI oscillator with x6 PLL multiplication. This frequency is fully supported across the entire operating voltage range (2.0–3.6 V) and temperature range (–40 to +105°C), as verified in Section 6.3.9 of the official datasheet (DocID025743 Rev 6).

Does the STM32F031C6T6 support hardware CRC calculation?

Yes, the STM32F031C6T6 includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE 802.3. It supports programmable polynomial (default 0x04C11DB7), 32-bit data width, and both big-endian and little-endian byte ordering - enabling fast firmware image validation and data integrity checks without CPU overhead.

How many I/O pins are 5 V tolerant on this MCU?

Up to 26 I/O pins on the STM32F031C6T6 are 5 V tolerant when configured in input, output, or alternate function modes - specifically all pins on GPIOA and GPIOB except PA13/SWDIO, PA14/SWCLK, and PB4/NJTRST. This is confirmed in Section 3.7 and Table 46 of the datasheet.

What debug interface does the STM32F031C6T6 use?

The STM32F031C6T6 uses Serial Wire Debug (SWD), a 2-pin (SWDIO and SWCLK) ARM-standard interface that replaces JTAG for reduced pin count and simplified PCB routing. SWD supports full read/write memory access, breakpoint setting, and real-time variable monitoring - documented in Section 3.16 and Figure 22 of the datasheet.