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STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28
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STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28

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STM32G031G6U6 Product Overview

STM32G031G6U6 is a Cortex-M0+ MCU at 64 MHz, UFQFPN-28. 32 KB Flash, 8 KB SRAM, 12-bit ADC (10 ch), 1 comparator, LP timers, RTC, 2×USART, 1×SPI, 1×I2C. 26 x 5 V-tolerant I/Os. 2.0–3.6 V, -40–85 °C. Compact QFN package for space-limited, cost-sensitive applications needing analog sensing and communication.

STM32G031G6U6 Core Features

Core: Cortex-M0+ 64 MHz Memory: 32 KB Flash, 8 KB SRAM Analog: 12-bit ADC (10 ch), 1× comparator Connectivity: 2×USART, 1×SPI, 1×I2C Timers: Advanced PWM, LP timers, RTC I/Os: 26 (5 V-tolerant) Package: UFQFPN-28

STM32G031G6U6 Applications

Sensor signal conditioning, home appliances, consumer electronics, IoT nodes, space-constrained analog and communication systems

STM32G031G6U6 Key Advantages

64 MHz Cortex-M0+ with comparator: Efficient performance and analog integration Ultra-small 28-pin QFN package saves board space Wide 2.0–3.6 V for battery operation 26 I/Os in compact footprint, high value

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STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28 STM32G031G6U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 32KB Flash 8KB SRAM ADC Comparator UFQFPN-28




FAQ

1. What is the STM32G031G6U6, and where is it positioned in the STM32G0 series?
The STM32G031G6U6 is an ultra‑cost‑effective MCU from STMicroelectronics' STM32G0 series, built around a 64 MHz Arm® Cortex®‑M0+ core in a UFQFPN‑28 package (4 mm × 4 mm). It features only 32 KB Flash and 8 KB SRAM, omitting advanced peripherals like USB and CAN FD while retaining two low‑power UARTs, two SPI/I²C interfaces, and a high‑precision 12‑bit ADC. In an extremely compact package, it delivers balanced communication capabilities and adequate program space at the lowest cost, making it ideal for compact embedded applications with moderate code size, clear functionality, and strict PCB area requirements—such as micro sensor hubs, wearables, and IoT endpoint nodes.

2. With only 32 KB Flash and 8 KB SRAM, what kind of programs can I run? Is it enough?
This combination is designed for highly optimized bare‑metal code. The 32 KB Flash can accommodate streamlined sensor drivers, UART/SPI communication stacks, and moderately complex control logic. The 8 KB SRAM requires careful variable management, but is perfectly adequate for relatively fixed‑function applications—such as multi‑sensor data acquisition with serial passthrough, or simple state‑machine controllers. If the program size may exceed 32 KB, it is recommended to upgrade to the pin‑compatible STM32G031G8U6 with 64 KB Flash and zero hardware changes.

3. How does the STM32G031G6U6 differ from the G031G8U6 (64 KB), and how should I choose based on Flash size?
Both share the same processor core, 8 KB SRAM, two low‑power UARTs, two SPI/I²C interfaces, 12‑bit ADC, and UFQFPN‑28 package. The only difference is on‑chip Flash capacity: G6U6 has 32 KB, while G8U6 has 64 KB. If your application can be tightly optimized to fit within 32 KB, the G6U6 delivers identical performance and peripherals at a lower cost. If you need more program space or may expand functionality later, the G8U6 is the safer choice. The hardware design can remain unchanged when switching between the two.

4. Does this chip have a USB or CAN interface? What if I need those?
The G031 series does not integrate USB or CAN FD controllers; its communication relies on two low‑power UARTs and two SPI/I²C interfaces. If USB is a must, you can add an external USB‑UART chip such as the CH340. If you require CAN bus, you can upgrade to the pin‑compatible G071G8U6 or G071GBU6 (with built‑in FDCAN controller), with minimal hardware changes and extensive code reuse.

5. Is the UFQFPN‑28 package (4 mm × 4 mm) difficult to solder? Is it suitable for hand assembly?
This is an ultra‑small QFN package with all pins hidden underneath; reflow soldering or a hot‑air station is required, and hand soldering with an iron is not feasible. It is primarily intended for automated SMT production to minimize PCB area. For prototyping, it is strongly recommended to develop and debug on the NUCLEO‑G031K8 board (LQFP‑32) first, then migrate to the UFQFPN‑28 chip. If hand‑solderability is essential, choose the LQFP‑32 packaged STM32G031K6T6.

6. What is its power consumption like? Is it suitable for battery‑powered portable devices?
Excellent. The G0 series features a run‑mode current of about 100 µA/MHz and supports multiple low‑power modes—Sleep, Stop, and Standby—with Standby current dropping to the micro‑amp range while retaining the RTC and backup registers. Combined with fast wake‑up times, it can easily achieve years of battery life, making it ideal for wireless sensor nodes, wearables, and outdoor monitoring tools.

7. How accurate is the built‑in 12‑bit ADC? Can it meet typical sensor acquisition needs?
It integrates a 12‑bit successive‑approximation ADC with a maximum sampling rate of 2.5 Msps and up to 16 external input channels. Its accuracy and speed are fully adequate for common sensor signals such as current, voltage, and temperature measurements—often without the need for an external dedicated ADC chip. Multiple ADC channels remain accessible even in the 28‑pin package.

8. What advantages does the STM32G031G6U6 have over traditional 8‑bit MCUs?
Compared to traditional 8‑bit MCUs such as 8051 or ATmega, the G031's 32‑bit Cortex‑M0+ core offers significant advantages in processing power, code density, and power efficiency. Its 64 MHz operating frequency far exceeds that of 8‑bit MCUs, yet at a comparable cost, and it can handle more complex algorithms and more efficient interrupt responses. It is also fully compatible with the STM32Cube ecosystem, providing far richer development tools, libraries, and community resources than legacy 8‑bit platforms.

9. What development tools are needed for the STM32G031G6U6? Is it compatible with the previous STM32 ecosystem?
It is fully compatible with the STM32Cube ecosystem, including the free STM32CubeMX and STM32CubeIDE, along with the STM32CubeG0 firmware package. Code from STM32F0 or F1 projects can be largely reused, with the main adjustments being peripheral configuration and pin mapping. For rapid prototyping, the NUCLEO‑G031K8 board features an LQFP‑32 package with highly compatible pinout and functionality, allowing direct code migration.

10. If I later need more storage or USB/CAN functionality, what upgrade options are available?
For more Flash, you can directly upgrade to the same‑package UFQFPN‑28 STM32G031G8U6 (64 KB Flash, 8 KB SRAM) with zero hardware changes. If you need USB‑C and CAN FD, choose the G071 series (e.g., G071G8U6 or G071GBU6 with 128 KB Flash and 36 KB SRAM). All these upgrades remain within the same STM32Cube ecosystem, allowing extensive code reuse and minimal migration effort.

Property:
Specification
Product Type:
Arm Cortex-M0+ Low-Power 32-bit MCU
Brand:
STMicroelectronics
Core:
Cortex-M0+ 64 MHz
Package:
UFQFPN-28
Memory:
32 KB Flash, 8 KB SRAM
Analog:
12-bit ADC, 1× Comparator
Connectivity:
USART, SPI, I2C
I/Os:
26
Voltage:
2.0V–3.6V
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