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STM32G431RBI6

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFBGA-64. Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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STM32G431RBI6

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFBGA-64

STM32G431RBI6 from STMicroelectronics, in a UFBGA-64. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
A1 VDD power_in Main power supply positive rail, 1.71 V to 3.6 V.
A2 PB9 bidirectional Port B pin 9, alternate functions include TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, FDCAN1_TX, TIM8_CH3, TIM1_CH3N.
A3 PB7 bidirectional Port B pin 7, alternate functions include TIM17_CH1N, TIM4_CH2, I2C1_SDA, TIM8_BKIN, USART1_RX, TIM3_CH4, LPTIM1_IN2.
A4 PB6 bidirectional Port B pin 6 with USB Type-C CC1 detection, alternate functions include TIM16_CH1N, TIM4_CH1, TIM8_CH1, USART1_TX, COMP4_OUT, TIM8_BKIN2.
A5 PB3 bidirectional Port B pin 3, alternate functions include JTDO-TRACESWO, TIM2_CH2, TIM4_ETR, USB_CRS_SYNC, TIM8_CH1N, SPI1_SCK.
A6 PC12 bidirectional Port C pin 12, alternate functions include TIM8_CH3N, SPI3_MOSI/I2S3_SD, USART3_CK, UCPD1_FRSTX.
A7 PA15 bidirectional Port A pin 15, alternate functions include JTDI, TIM2_CH1, TIM8_CH1, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX.
A8 VDD power_in Main power supply positive rail, 1.71 V to 3.6 V.
B1 PC13 bidirectional Port C pin 13, alternate functions include TIM1_BKIN, TIM1_CH1N, TIM8_CH4N, with RTC tamper and wakeup functions.
B2 VSS power_in Ground (sink) reference.
B3 PB8-BOOT0 bidirectional Port B pin 8 / Boot pin, alternate functions include TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, FDCAN1_RX.
B4 PB5 bidirectional Port B pin 5, alternate functions include TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD.
B5 PD2 bidirectional Port D pin 2, alternate functions include TIM3_ETR, TIM8_BKIN.
B6 PC11 bidirectional Port C pin 11, alternate functions include TIM8_CH2N, UART4_RX, SPI3_MISO, USART3_RX, I2C3_SDA.
B7 VSS power_in Ground (sink) reference.
B8 PA12 bidirectional Port A pin 12 with USB DP function, alternate functions include TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, FDCAN1_TX.
C1 PC14-OSC32_IN bidirectional Port C pin 14 / 32 kHz oscillator input, alternate functions include EVENTOUT.
C2 VBAT power_in Backup battery power supply for RTC and backup registers, 1.55 V to 3.6 V.
C3 PC1 bidirectional Port C pin 1, alternate functions include LPTIM1_OUT, TIM1_CH2, LPUART1_TX, SAI1_SD_A with ADC and comparator analog inputs.
C4 PB4 bidirectional Port B pin 4 with USB Type-C CC2 detection, alternate functions include JTRST, TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO.
C5 PC10 bidirectional Port C pin 10, alternate functions include TIM8_CH1N, UART4_TX, SPI3_SCK/I2S3_CK, USART3_TX.
C6 PA14 bidirectional
C7 PA13 bidirectional Port A pin 13 / SWDIO-JTAG TMS, alternate functions include TIM16_CH1N, I2C1_SCL, IR_OUT, USART3_CTS, TIM4_CH3, SAI1_SD_B.
C8 PA11 bidirectional Port A pin 11 with USB DM function, alternate functions include SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, FDCAN1_RX.
D1 PC15-OSC32_OUT bidirectional Port C pin 15 / 32 kHz oscillator output, alternate functions include EVENTOUT.
D2 PG10-NRST bidirectional Port G pin 10 / System reset pin with embedded weak pull-up, alternate functions include MCO, EVENTOUT.
D3 PC2 bidirectional Port C pin 2, alternate functions include LPTIM1_IN2, TIM1_CH3, COMP3_OUT with ADC analog input.
D4 PA4 bidirectional Port A pin 4, alternate functions include TIM3_CH2, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, SAI1_FS_B with DAC/ADC/COMP analog functions.
D5 PC4 bidirectional Port C pin 4, alternate functions include TIM1_ETR, I2C2_SCL, USART1_TX with ADC analog input.
D6 PA10 bidirectional Port A pin 10 with USB Type-C DBCC2 function, alternate functions include TIM17_BKIN, USB_CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX.
D7 PA9 bidirectional Port A pin 9 with USB Type-C DBCC1 function, alternate functions include I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, TIM15_BKIN.
D8 PC9 bidirectional Port C pin 9, alternate functions include TIM3_CH4, TIM8_CH4, I2SCKIN, TIM8_BKIN2, I2C3_SDA.
E1 PF0-OSC_IN bidirectional Port F pin 0 / External high-speed oscillator input, alternate functions include I2C2_SDA, SPI2_NSS/I2S2_WS, TIM1_CH3N with ADC analog input.
E2 PC0 bidirectional Port C pin 0, alternate functions include LPTIM1_IN1, TIM1_CH1, LPUART1_RX with ADC and comparator analog inputs.
E3 PA1 bidirectional Port A pin 1, alternate functions include RTC_REFIN, TIM2_CH2, USART2_RTS_DE, TIM15_CH1N with ADC and OPAMP analog inputs.
E4 PA5 bidirectional Port A pin 5, alternate functions include TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX with DAC/ADC/OPAMP/COMP analog functions.
E5 PB0 bidirectional Port B pin 0, alternate functions include TIM3_CH3, TIM8_CH2N, TIM1_CH2N, UCPD1_FRSTX with ADC and OPAMP analog inputs.
E6 PA8 bidirectional Port A pin 8, alternate functions include MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, TIM4_ETR, SAI1 clock functions.
E7 PC7 bidirectional Port C pin 7, alternate functions include TIM3_CH2, TIM8_CH2, I2S3_MCK.
E8 PC6 bidirectional Port C pin 6, alternate functions include TIM3_CH1, TIM8_CH1, I2S2_MCK.
F1 PF1-OSC_OUT bidirectional Port F pin 1 / External high-speed oscillator output, alternate functions include SPI2_SCK/I2S2_CK with ADC analog input.
F2 PA0 bidirectional Port A pin 0, alternate functions include TIM2_CH1, USART2_CTS, COMP1_OUT, TIM8_BKIN, TIM8_ETR, TIM2_ETR with RTC/WKUP and ADC analog inputs.
F3 PA2 bidirectional Port A pin 2, alternate functions include TIM2_CH3, USART2_TX, COMP2_OUT, TIM15_CH1, LPUART1_TX, UCPD1_FRSTX with ADC and OPAMP analog inputs.
F4 PC5 bidirectional Port C pin 5, alternate functions include TIM15_BKIN, SAI1_D3, TIM1_CH4N, USART1_RX with ADC, OPAMP and COMP analog inputs.
F5 PB1 bidirectional Port B pin 1, alternate functions include TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, LPUART1_RTS_DE with ADC and OPAMP analog inputs.
F6 PC8 bidirectional
F7 PB15 bidirectional Port B pin 15, alternate functions include RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N, SPI2_MOSI/I2S2_SD with ADC analog input.
F8 PB14 bidirectional Port B pin 14, alternate functions include TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_RTS_DE, COMP4_OUT with ADC and OPAMP analog inputs.
G1 PC3 bidirectional Port C pin 3, alternate functions include LPTIM1_ETR, TIM1_CH4, SAI1_D1, TIM1_BKIN2, SAI1_SD_A with ADC analog input.
G2 VSS power_in Ground (sink) reference.
G3 PA6 bidirectional Port A pin 6, alternate functions include TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, LPUART1_CTS with ADC and OPAMP analog inputs.
G4 VSSA power_in Analog ground reference for ADC, DAC, comparators and operational amplifiers.
G5 VREF+ power_in Positive analog reference for ADC, 2.048 V, 2.5 V, or 2.95 V from internal VREFBUF or external supply.
G6 PB13 bidirectional Port B pin 13, alternate functions include SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, LPUART1_CTS with ADC and OPAMP analog inputs.
G7 VSS power_in Ground (sink) reference.
G8 PB12 bidirectional Port B pin 12, alternate functions include I2C2_SMBA, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, LPUART1_RTS_DE with ADC analog input.
H1 VDD power_in Main power supply positive rail, 1.71 V to 3.6 V.
H2 PA3 bidirectional Port A pin 3, alternate functions include TIM2_CH4, SAI1_CK1, USART2_RX, TIM15_CH2, LPUART1_RX, SAI1_MCLK_A with ADC and OPAMP analog inputs.
H3 PA7 bidirectional Port A pin 7, alternate functions include TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, UCPD1_FRSTX with ADC, OPAMP and COMP analog inputs.
H4 PB2 bidirectional Port B pin 2, alternate functions include RTC_OUT2, LPTIM1_OUT, I2C3_SMBA with ADC, OPAMP and COMP analog inputs.
H5 VDDA power_in Analog power supply for ADC, DAC, comparators, operational amplifiers and VREFBUF, 1.62 V to 3.6 V.
H6 PB10 bidirectional Port B pin 10, alternate functions include TIM2_CH3, USART3_TX, LPUART1_RX, TIM1_BKIN, SAI1_SCK_A with OPAMP analog input.
H7 PB11 bidirectional Port B pin 11, alternate functions include TIM2_CH4, USART3_RX, LPUART1_TX with ADC analog input.
H8 VDD power_in Main power supply positive rail, 1.71 V to 3.6 V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package UFBGA-64
Category Embedded Processors & Controllers
Pins 64

CAD (KiCad official)

  • Symbol: STM32G431RBI6
  • Footprint: Package_BGA:UFBGA-64_5x5mm_Layout8x8_P0.5mm
  • 3D model: UFBGA-64 (KiCad packages3D, STEP)
  • 3D model files: stm32g431rbi6-etched.step / stm32g431rbi6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32g431rbi6.step / stm32g431rbi6.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (200 pp, sha256 5994e7e78a451db7, retrieved 2026-09-29, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF