STMicroelectronics STM32C031G6U7

Overview

STM32C031G6U7 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, featuring 32 KB flash, 12 KB SRAM with hardware parity, 48 MHz max CPU frequency, and integrated 12-bit ADC (0.4 µs conversion), two USARTs (one with LIN/ISO7816), I²C Fast-mode Plus, SPI, RTC, and 45 5 V-tolerant I/Os. It targets cost-sensitive industrial control, smart sensors, and power management modules requiring robust low-power operation down to Shutdown mode.

For engineers reviewing the STM32C031G6U7 datasheet, STM32C031G6U7 pinout, STM32C031G6U7 application, or STM32C031G6U7 equivalent, key selection criteria include its 28-pin UFQFPN footprint, 2.0–3.6 V supply range, -40°C to 125°C extended temperature grade, hardware CRC unit, and dual watchdog timers (IWDG + WWDG) for functional safety-critical firmware execution.

Technical Context

The device integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU), enabling secure partitioning of code and data spaces. Its clock system combines four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1%), and 32 kHz LSI (±5%), supporting dynamic clock switching for power optimization.

Peripherals are interconnected via a multi-layer AHB/APB bus matrix, allowing concurrent DMA transfers and peripheral access without contention. The 3-channel DMA controller supports flexible request mapping to 39 event sources, including ADC, USART, SPI, and timers-enabling zero-CPU-overhead sensor data acquisition and communication stacks.

Key Specifications

Pinout & Package

STM32C031G6U7 uses the UFQFPN28 (4 × 4 mm, 0.5 mm pitch) package with 28 terminals, optimized for space-constrained PCB layouts while maintaining thermal performance via exposed pad (EPAD) soldered to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32C031G6U7, the C011F4U6 sacrifices RTC and communication flexibility for smaller footprint, while the G031F8P6 trades LIN compliance for USB capability-making the C031G6U7 optimal for cost-sensitive, LIN-enabled automotive and industrial edge nodes requiring calendar-aware low-power operation.

Availability

STM32C031G6U7 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and IoT sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32C031G6U7 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 since 1987.

The STM32C0 series targets cost-optimized, high-reliability embedded applications-specifically engineered for industrial automation, appliance control, and automotive sub-systems where robustness, low power, and functional safety features are essential.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32C031G6U7 operates at up to 48 MHz and supports a supply voltage range of 2.0 V to 3.6 V. Its internal 48 MHz RC oscillator (HSI48) achieves ±1% accuracy across temperature and voltage, eliminating need for external crystal in many timing-critical applications like motor control PWM generation.

Does it support hardware encryption or secure boot features?

No, the STM32C031G6U7 does not include hardware cryptographic accelerators or secure boot ROM. It provides readout protection (RDP) Level 1 and Level 2, memory protection unit (MPU), and hardware parity on SRAM-sufficient for basic firmware IP protection and fault detection, but not for certified secure boot implementations.

Can it drive a standard 16x2 character LCD directly?

Yes, the STM32C031G6U7 can drive a parallel 16x2 LCD using GPIO bit-banging due to its 45 5 V-tolerant I/Os and fast toggle speed (<10 ns). No external level shifters are needed, though dedicated LCD segment drivers (e.g., ST7036) are recommended for multiplexed displays requiring higher contrast and lower power.

What debug interface does it use and what pins are required?

It uses Serial Wire Debug (SWD) with two dedicated pins: SWCLK (PA14) and SWDIO (PA13). These pins are shared with JTAG TCK/TMS but default to SWD after reset. No NRST connection is mandatory for debug, though it enables reliable mass erase and recovery from lock-up states.