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STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32
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STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32

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STM32G031K8U6 Product Overview

STM32G031K8U6 is a Cortex-M0+ MCU at 64 MHz, UFQFPN-32. 64 KB Flash, 8 KB SRAM, 12-bit ADC (12 ch), 1 comparator, LP timers, RTC, 2×USART, 1×SPI/I2S, 1×I2C. 29 x 5 V-tolerant I/Os. 2.0–3.6 V, -40–85 °C. Compared to STM32G031K6U6 (32 KB Flash), doubles Flash to 64 KB for larger program storage in compact analog-sensing and communication applications.

STM32G031K8U6 Core Features

Core: Cortex-M0+ 64 MHz Memory: 64 KB Flash, 8 KB SRAM Analog: 12-bit ADC (12 ch), 1× comparator Connectivity: 2×USART, 1×SPI/I2S, 1×I2C Timers: Advanced PWM, LP timers, RTC I/Os: 29 (5 V-tolerant) Package: UFQFPN-32

STM32G031K8U6 Applications

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

STM32G031K8U6 Key Advantages

64 MHz Cortex-M0+ with comparator: Efficient performance and analog integration 64 KB Flash for more code space 29 I/Os in tiny 32-pin QFN package, high integration 12-channel ADC for flexible signal acquisition Wide 2.0–3.6 V for battery operation

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STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32 STM32G031K8U6 ST Mainstream Arm Cortex-M0+ Low-Power 32-bit MCU 64KB Flash 8KB SRAM ADC Comparator UFQFPN-32




FAQ

1. What is the STM32G031K8U6, and where is it positioned in the STM32G0 series?
The STM32G031K8U6 is an ultra‑value entry‑level MCU from STMicroelectronics' STM32G0 series, built around a 64 MHz Arm® Cortex®‑M0+ core in an ultra‑small UFQFPN‑32 package (5 mm × 5 mm). It features 64 KB Flash and 8 KB SRAM, omitting advanced communication interfaces like USB and CAN FD to focus on delivering the lowest possible cost and the smallest footprint, while retaining practical features such as a high‑precision 12‑bit ADC, a hardware divider, and single‑cycle I/O acceleration. It is purpose‑built for simple embedded applications with the strictest requirements for space, power, and cost, such as wearables, micro sensor nodes, battery‑powered simple controllers, and consumer electronics.

2. How does the STM32G031K8U6 differ from the STM32G030K8U6? How should I choose?
The G031 offers richer communication peripherals than the G030: it includes two low‑power UARTs (LPUART) and two SPI/I²S interfaces, whereas the G030 typically has only one. Additionally, the G031 supports more flexible DMA channels and extra timers on certain variants. If your application only requires a very limited number of communication interfaces, the G030 can further reduce cost; if you need more serial ports, the G031 is the more flexible choice. Both share essentially the same package and Flash/SRAM capacities.

3. Are 64 KB Flash and 8 KB SRAM sufficient? What kind of programs can they run?
This memory configuration is designed for highly optimized bare‑metal firmware. The 64 KB Flash can accommodate streamlined sensor drivers, UART/SPI communication stacks, and simple application logic. The 8 KB SRAM requires careful variable management, but is entirely adequate for extremely fixed‑function micro applications such as disposable temperature loggers, miniature battery monitors, and simple status indicators. If more memory is needed later, you can upgrade to the pin‑compatible G071K8U6 (QFN‑32) with 128 KB Flash and 36 KB SRAM with minimal hardware changes.

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 capabilities rely entirely on UART, SPI, and 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 G071K8U6 (QFN‑32) or G071CBT6 (LQFP‑48), which have a built‑in FDCAN controller.

5. Is the UFQFPN‑32 package (5 mm × 5 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 space. For prototyping, it is strongly recommended to develop and debug on the NUCLEO‑G031K8 board (LQFP‑32) first, then migrate to the UFQFPN‑32 chip. If hand‑solderability is essential, choose the LQFP‑32 packaged STM32G031K8T6.

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.

8. What are the main upgrades of the STM32G031K8U6 over the STM32F0 series?
Compared to the STM32F0, the G031 series offers significant improvements: core frequency increases from 48 MHz to 64 MHz; Flash and SRAM capacities are larger (64 KB/8 KB vs. typical 16–32 KB/4–8 KB on the F0); the ADC is more advanced; and overall power management is more refined. It delivers better processing performance and energy efficiency at an entry‑level price, making it an ideal replacement and upgrade for F0 designs.

9. What development tools are needed for the STM32G031K8U6? 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?
You can directly upgrade to the same‑package UFQFPN‑32 STM32G071K8U6 (128 KB Flash, 36 KB SRAM, adds USB‑C and FDCAN), or choose the LQFP‑48 G071CBT6 for more I/Os. If you need greater real‑time processing power (e.g., DSP instructions, FPU), consider moving to the STM32G4 series (Cortex‑M4, 170 MHz). 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-32
Memory:
64 KB Flash, 8 KB SRAM
Analog:
12-bit ADC, 1× Comparator
Connectivity:
USART, SPI/I2S, I2C
I/Os:
29
Voltage:
2.0V–3.6V
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