STMicroelectronics STM32G031K6U6

Overview

STM32G031K6U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 package, operating up to 64 MHz with 64 KB Flash, 8 KB SRAM, and integrated 12-bit ADC (0.4 µs conversion), dual USARTs (one with ISO7816/LIN/IrDA), and two I²C interfaces supporting Fast-mode Plus (1 Mbit/s). It serves as a cost-optimized main controller in smart sensors and industrial edge nodes requiring low-power operation and secure firmware execution.

For engineers reviewing the STM32G031K6U6 datasheet, STM32G031K6U6 pinout, STM32G031K6U6 application, or STM32G031K6U6 equivalent, key selection criteria include its 64 MHz CPU frequency, 1.7–3.6 V supply range, -40°C to 85°C temperature grade, 5-channel DMA, and support for SWD debug - all critical for battery-powered IoT endpoints and programmable logic controllers.

Technical Context

The STM32G031K6U6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and supports three low-power modes (Stop, Standby, Shutdown) with sub-µA RTC backup current. Its clock system combines internal 16 MHz RC (±1 %) and 32 kHz RC (±5 %) oscillators with external 4–48 MHz crystal and 32.768 kHz LSE options, enabling precise timing control across power states.

Peripheral interconnect uses a dedicated AHB/APB matrix supporting concurrent access to ADC, timers, and communication interfaces. The 11-timer suite includes one 128 MHz-capable advanced-control timer (TIM1), four general-purpose 16-bit timers, two low-power 16-bit timers (LPTIM1/2), and dual watchdogs (IWDG/WWDG) - enabling motor control, sensor sampling, and system safety monitoring in a single chip.

Key Specifications

Pinout & Package

STM32G031K6U6 is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package with exposed thermal pad, compliant with ECOPACK2 environmental standards. Pin pitch is 0.5 mm; body dimensions are 5.0 × 5.0 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K6U6, STM32G030F6P6 trades security and analog features for lower cost and smaller footprint, while STM32G041F8P6 adds crypto and thermal resilience at the expense of I/O availability - making the G031K6U6 optimal for balanced cost-performance-security in mid-tier industrial edge nodes.

Availability

STM32G031K6U6 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial I/O modules, USB-C power monitors, and white goods motor control systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for STM32G031K6U6 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, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, energy-efficient embedded applications with Arm Cortex-M0+ cores, emphasizing security, low-power operation, and rapid time-to-market for entry-level IoT and industrial control designs.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32G031K6U6 operates at up to 64 MHz with a supply voltage range of 1.7 V to 3.6 V. Its internal 16 MHz RC oscillator is factory-calibrated to ±1 % accuracy, and the PLL allows full-speed operation without external crystal dependency. Voltage regulation includes programmable brownout reset (BOR) and voltage detector (PVD) for robust power management.

Does it support secure firmware updates and code protection?

Yes. The device implements Readout Protection (ROP) Levels 1 and 2, a securable Flash area, and hardware-based write protection. These features prevent unauthorized readout of firmware and protect critical bootloader sections. Secure boot is enabled via option byte configuration, and the 96-bit unique ID supports device authentication in over-the-air update schemes.

How many I/O pins are 5 V tolerant, and what interfaces do they support?

Up to 28 GPIOs are 5 V tolerant, including all pins in Port A and Port B. These support alternate functions such as USART TX/RX, I²C SCL/SDA, SPI MOSI/MISO/SCK, and timer channels. The 5 V tolerance allows direct interfacing with legacy 5 V logic and industrial sensors without level-shifting circuitry.

What debug interface is available, and does it require additional pins?

The STM32G031K6U6 supports Serial Wire Debug (SWD) using only two pins: SWDIO and SWCLK. No JTAG header or additional pins are needed. SWD enables full flash programming, real-time variable inspection, and breakpoint debugging through standard tools like ST-LINK/V2 and OpenOCD-compatible probes.