This is information on a product in full production.
October 2021 DS12992 Rev 3 1/120
STM32G031x4/x6/x8
Arm
®
Cortex
®
-M0+ 32-bit MCU, up to 64 KB Flash, 8 KB RAM,
2x USART, timers, ADC, comm. I/Fs, 1.7-3.6V
Datasheet - production data
Features
• Core: Arm
®
32-bit Cortex
®
-M0+ CPU,
frequency up to 64 MHz
• -40°C to 85°C/105°C/125°C operating
temperature
• Memories
– Up to 64 Kbytes of Flash memory with
protection and securable area
– 8 Kbytes of SRAM with HW parity check
• CRC calculation unit
• Reset and power management
– Voltage range: 1.7 V to 3.6 V
– Power-on/Power-down reset (POR/PDR)
– Programmable Brownout reset (BOR)
– Programmable voltage detector (PVD)
– Low-power modes:
Sleep, Stop, Standby, Shutdown
–V
BAT
supply for RTC and backup registers
• Clock management
– 4 to 48 MHz crystal oscillator
– 32 kHz crystal oscillator with calibration
– Internal 16 MHz RC with PLL option (±1 %)
– Internal 32 kHz RC oscillator (±5 %)
• Up to 44 fast I/Os
– All mappable on external interrupt vectors
– Multiple 5 V-tolerant I/Os
• 5-channel DMA controller with flexible mapping
• 12-bit, 0.4 µs ADC (up to 16 ext. channels)
– Up to 16-bit with hardware oversampling
– Conversion range: 0 to 3.6V
• 11 timers (one 128 MHz capable): 16-bit for
advanced motor control, one 32-bit and four
16-bit general-purpose, two low-power 16-bit,
two watchdogs, SysTick timer
• Calendar RTC with alarm and periodic wakeup
from Stop/Standby/Shutdown
• Communication interfaces
–Two I
2
C-bus interfaces supporting Fast-
mode Plus (1 Mbit/s) with extra current
sink, one supporting SMBus/PMBus and
wakeup from Stop mode
– Two USARTs with master/slave
synchronous SPI; one supporting ISO7816
interface, LIN, IrDA capability, auto baud
rate detection and wakeup feature
– One low-power UART
– Two SPIs (32 Mbit/s) with 4- to 16-bit
programmable bitframe, one multiplexed
with I
2
S interface
• Development support: serial wire debug (SWD)
• 96-bit unique ID
• All packages ECOPACK
2 compliant
Table 1. Device summary
Reference Part number
STM32G031x4
STM32G031C4, STM32G031F4,
STM32G031G4, STM32G031K4,
STM32G031J4
STM32G031x6
STM32G031C6, STM32G031F6,
STM32G031G6, STM32G031K6,
STM32G031J6
STM32G031x8
STM32G031C8, STM32G031F8,
STM32G031G8, STM32G031K8,
STM32G031Y8
UFQFPN48
UFQFPN32
UFQFPN28
LQFP48
LQFP32
7×7 mm
5×5 mm
4×4 mm
7
×
7 mm
7
×
7 mm
TSSOP20
6.4
×
4.4 mm
SO8N
4.9
×
6 mm
WLCSP18
1.86 × 2.14 mm
www.st.com
Contents STM32G031x4/x6/x8
2/120 DS12992 Rev 3
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Arm
®
Cortex
®
-M0+ core with MPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Embedded Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.1 Securable area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.6 Cyclic redundancy check calculation unit (CRC) . . . . . . . . . . . . . . . . . . . 15
3.7 Power supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7.1 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7.2 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7.4 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.7.5 Reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7.6 VBAT operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.8 Interconnect of peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9 Clocks and startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.10 General-purpose inputs/outputs (GPIOs) . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.11 Direct memory access controller (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.12 DMA request multiplexer (DMAMUX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.13 Interrupts and events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.13.1 Nested vectored interrupt controller (NVIC) . . . . . . . . . . . . . . . . . . . . . . 23
3.13.2 Extended interrupt/event controller (EXTI) . . . . . . . . . . . . . . . . . . . . . . 23
3.14 Analog-to-digital converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.14.1 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.14.2 Internal voltage reference (V
REFINT
) . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.14.3 V
BAT
battery voltage monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.15 Voltage reference buffer (VREFBUF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.16 Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
