STMicroelectronics STM32G031K8T7

Overview

STM32G031K8T7 from STMicroelectronics is an Arm® Cortex®-M0+ 32-bit microcontroller with 64 KB Flash, 8 KB SRAM, 12-bit ADC (0.4 µs conversion), dual USARTs (one supporting LIN/IrDA/ISO7816), and operating voltage range of 1.7–3.6 V. It integrates RTC with alarm, five-channel DMA, and low-power modes (Stop/Standby/Shutdown) for battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the STM32G031K8T7 datasheet, STM32G031K8T7 pinout, STM32G031K8T7 application, or STM32G031K8T7 equivalent, key selection criteria include its 64 MHz max CPU frequency, 44 fast I/Os (multiple 5 V-tolerant), dual I²C Fast-mode Plus (1 Mbit/s), and hardware parity on SRAM - all validated for cost-sensitive, safety-aware embedded control in consumer appliances and IoT edge nodes.

Technical Context

The STM32G031K8T7 implements a single-core Arm Cortex-M0+ with MPU, executing at up to 64 MHz via internal 16 MHz RC + PLL or external 4–48 MHz crystal. Its memory subsystem includes 64 KB flash with securable area and readout protection, plus 8 KB SRAM with hardware parity checking for functional safety compliance.

Clock management supports multiple sources: 4–48 MHz HSE, 32 kHz LSE with calibration, 16 MHz HSI (±1%), and 32 kHz LSI (±5%). Power architecture enables five low-power modes - Sleep, Stop 0/1, Standby, and Shutdown - with wakeup from RTC, LPUART, or external interrupt, achieving sub-100 nA shutdown current.

Key Specifications

Pinout & Package

The STM32G031K8T7 is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin layout supports full peripheral remapping across GPIO ports A–F, with dedicated SWD debug interface (SWCLK/SWDIO) and VBAT supply for RTC backup.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G031K8T7, the STM32G041K8T7 adds USB and Flash headroom at the expense of higher static power and cost, while the LPC804 lacks parity, calendar RTC, and low-power wake features - making the G031K8T7 optimal for balanced cost, safety, and power efficiency in certified industrial endpoints.

Availability

STM32G031K8T7 is available at Aetrix Electronics and suitable for smart metering, industrial motor control, and battery-powered IoT sensor nodes requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G031K8T7 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, specializing in microcontrollers, power management, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32G0 series targets cost-sensitive, energy-efficient embedded applications - delivering Cortex-M0+ performance with enhanced security, analog integration, and ultra-low-power operation for next-generation edge devices.

FAQ

What is the maximum operating frequency of the STM32G031K8T7?

The STM32G031K8T7 achieves a maximum CPU frequency of 64 MHz using its internal 16 MHz RC oscillator with PLL multiplication or an external 4–48 MHz crystal. This frequency is fully supported across the full –40°C to 125°C temperature range and 1.7–3.6 V supply, with timing verified per DS12992 Rev 4 Section 5.3.22.

Does the STM32G031K8T7 support hardware encryption or secure boot?

The STM32G031K8T7 does not integrate AES or hash accelerators, but it supports secure boot via readout protection (ROP) Levels 1 and 2, securable flash area, and boot vector remapping. These features prevent unauthorized firmware access and enforce trusted execution - sufficient for IEC 62443-3-3 SL1 and UL 60730 Class B compliance when combined with external secure elements.

How many 5 V-tolerant I/O pins does the STM32G031K8T7 have?

The STM32G031K8T7 provides up to 39 5 V-tolerant I/Os across GPIO ports A, B, C, D, and F - confirmed in DS12992 Rev 4 Table 12 (Pin assignment and description) and Section 5.3.14. This tolerance applies regardless of VDD voltage (1.7–3.6 V), enabling direct interfacing with legacy 5 V peripherals without external level shifters.

What debug interface does the STM32G031K8T7 use, and is JTAG supported?

The STM32G031K8T7 uses Serial Wire Debug (SWD) with dedicated SWCLK and SWDIO pins (PA14/PA13). JTAG is not supported - the debug port is SWD-only, consistent with the G0-series architecture. SWD requires only two pins and supports full flash programming, real-time tracing, and breakpoint debugging via standard tools like ST-LINK/V2-1 and OpenOCD.