STM32G431CBT6 - Arm Cortex-M4 Microcontroller

@@ -0,0 +1,109 @@+# STM32G431CBT6++**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)++STM32G431CBT6 from STMicroelectronics, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VBAT | power_in | Backup supply for RTC and backup registers when VDD is off. Connect to VDD or a battery (1.55 V to 3.6 V). |+| 2 | PC13 | bidirectional | General-purpose 5V-tolerant I/O in Backup domain (limited drive: max 2 MHz / 30 pF via power switch). Alternate: TIM1_BKIN, TIM1_CH1N, TIM8_CH4N, EVENTOUT. Additional: WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT1. |+| 3 | PC14-OSC32_IN | bidirectional | Backup-domain 5V-tolerant GPIO doubling as LSE 32.768 kHz crystal input (OSC32_IN). Same drive limits as PC13. |+| 4 | PC15-OSC32_OUT | bidirectional | Backup-domain 5V-tolerant GPIO doubling as LSE 32.768 kHz crystal output (OSC32_OUT). Same drive limits as PC13. |+| 5 | PF0-OSC_IN | input | HSE crystal oscillator input (OSC_IN), 4-48 MHz, or input-only 5V-tolerant Fm+ I/O PF0. Alternate: I2C2_SDA, SPI2_NSS/I2S2_WS, TIM1_CH3N, EVENTOUT. Additional: ADC1_IN10. |+| 6 | PF1-OSC_OUT | output | HSE crystal oscillator output (OSC_OUT) or output-only 5V-tolerant I/O PF1. Alternate: SPI2_SCK/I2S2_CK, EVENTOUT. Additional: ADC2_IN10, COMP3_INM. |+| 7 | PG10-NRST | bidirectional | Bidirectional device reset with embedded weak pull-up (active low). Also selectable as GPIO PG10 with MCO/EVENTOUT alternate. |+| 8 | PA0 | bidirectional | 3.6 V tolerant analog-capable I/O (TT_a). Alternate: TIM2_CH1, USART2_CTS, COMP1_OUT, TIM8_BKIN/ETR, TIM2_ETR, EVENTOUT. Additional: ADC12_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2, WKUP1. |+| 9 | PA1 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH2, USART2_RTS_DE, TIM15_CH1N, EVENTOUT. Additional: RTC_REFIN, ADC12_IN2, COMP1_INP, OPAMP1_VINP, OPAMP3_VINP. |+| 10 | PA2 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH3, USART2_TX, COMP2_OUT, TIM15_CH1, LPUART1_TX, UCPD1_FRSTX, EVENTOUT. Additional: ADC1_IN3, COMP2_INM, OPAMP1_VOUT, WKUP4/LSCO. |+| 11 | PA3 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH4, SAI1_CK1, USART2_RX, TIM15_CH2, LPUART1_RX, SAI1_MCLK_A, EVENTOUT. Additional: ADC1_IN4, COMP2_INP, OPAMP1_VINM/VINP. |+| 12 | PA4 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH2, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, SAI1_FS_B, EVENTOUT. Additional: ADC2_IN17, DAC1_OUT1, COMP1_INM. |+| 13 | PA5 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX, EVENTOUT. Additional: ADC2_IN13, DAC1_OUT2, COMP2_INM, OPAMP2_VINM. |+| 14 | PA6 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, LPUART1_CTS, EVENTOUT. Additional: ADC2_IN3, OPAMP2_VOUT. |+| 15 | PA7 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, UCPD1_FRSTX, EVENTOUT. Additional: ADC2_IN4, COMP2_INP, OPAMP1_VINP, OPAMP2_VINP. |+| 16 | PB0 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH3, TIM8_CH2N, TIM1_CH2N, UCPD1_FRSTX, EVENTOUT. Additional: ADC1_IN15, COMP4_INP, OPAMP2_VINP, OPAMP3_VINP. |+| 17 | PB1 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, LPUART1_RTS_DE, EVENTOUT. Additional: ADC1_IN12, COMP1_INP, OPAMP3_VOUT. |+| 18 | PB2 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: RTC_OUT2, LPTIM1_OUT, I2C3_SMBA, EVENTOUT. Additional: ADC2_IN12, COMP4_INM, OPAMP3_VINM. |+| 19 | VSSA | power_in | Analog ground reference for ADC/DAC/comparators/OPAMP/VREF. Tie to system ground plane. |+| 20 | VREF+ | power_in | Positive reference voltage for ADC and DAC, or output of the internal VREFBUF (2.048 V / 2.5 V / 2.95 V). Bypass close to the pin. |+| 21 | VDDA | power_in | Analog supply for ADC/DAC/comparators/OPAMPs/VREFBUF, 1.71 V to 3.6 V. Must be present and stable before enabling analog blocks. |+| 22 | PB10 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH3, USART3_TX, LPUART1_RX, TIM1_BKIN, SAI1_SCK_A, EVENTOUT. Additional: OPAMP3_VINM. |+| 23 | VSS | power_in | Digital ground. Tie to system ground plane. |+| 24 | VDD | power_in | Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF and share bulk cap with the other VDD pins. |+| 25 | PB11 | bidirectional | 5 V tolerant analog-capable I/O. Alternate: TIM2_CH4, USART3_RX, LPUART1_TX, EVENTOUT. Additional: ADC12_IN14. |+| 26 | PB12 | bidirectional | 5 V tolerant analog-capable I/O. Alternate: I2C2_SMBA, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, LPUART1_RTS_DE, EVENTOUT. Additional: ADC1_IN11. |+| 27 | PB13 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, LPUART1_CTS, EVENTOUT. Additional: OPAMP3_VINP. |+| 28 | PB14 | bidirectional | 3.6 V tolerant analog-capable I/O. Alternate: TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_RTS_DE, COMP4_OUT, EVENTOUT. Additional: ADC1_IN5, OPAMP2_VINP. |+| 29 | PB15 | bidirectional | 5 V tolerant analog-capable I/O. Alternate: RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N, SPI2_MOSI/I2S2_SD, EVENTOUT. Additional: ADC2_IN15. |+| 30 | PA8 | bidirectional | 5 V tolerant Fm+ I/O. Alternate: MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, TIM4_ETR, SAI1_CK2, SAI1_SCK_A, EVENTOUT. |+| 31 | PA9 | bidirectional | 5 V tolerant Fm+ USB Type-C dead-battery-capable I/O. Alternate: I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, TIM15_BKIN, TIM2_CH3, SAI1_FS_A, EVENTOUT. Additional: UCPD1_DBCC1. |+| 32 | PA10 | bidirectional | 5 V tolerant USB Type-C dead-battery-capable analog-capable I/O. Alternate: TIM17_BKIN, USB_CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, TIM2_CH4, TIM8_BKIN, SAI1_D1/SD_A, EVENTOUT. Additional: UCPD1_DBCC2. |+| 33 | PA11 | bidirectional | USB full-speed D- (USB_DM) additional function; also 5 V tolerant I/O with alternates SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, FDCAN1_RX, TIM4_CH1, TIM1_CH4, TIM1_BKIN2, EVENTOUT. |+| 34 | PA12 | bidirectional | USB full-speed D+ (USB_DP) additional function; also 5 V tolerant I/O with alternates TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, FDCAN1_TX, TIM4_CH2, TIM1_ETR, EVENTOUT. |+| 35 | VSS | power_in | Digital ground. Tie to system ground plane. |+| 36 | VDD | power_in | Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF. |+| 37 | PA13 | bidirectional | SWDIO / JTMS debug pin (default after reset, weak pull-up). Also 5 V tolerant Fm+ I/O with alternates TIM16_CH1N, I2C1_SCL, IR_OUT, USART3_CTS, TIM4_CH3, SAI1_SD_B, EVENTOUT. |+| 38 | PA14 | bidirectional | SWCLK / JTCK debug pin (default after reset, internal pull-down). Also 5 V tolerant Fm+ I/O with alternates LPTIM1_OUT, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX, SAI1_FS_B, EVENTOUT. |+| 39 | PA15 | bidirectional | JTDI debug pin at reset (weak pull-up); reconfigurable to 5 V tolerant Fm+ GPIO with alternates TIM2_CH1, TIM8_CH1, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX, UART4_RTS_DE, TIM1_BKIN, TIM2_ETR, EVENTOUT. |+| 40 | PB3 | bidirectional | JTDO/TRACESWO debug pin at reset; also 5 V tolerant I/O with alternates TIM2_CH2, TIM4_ETR, USB_CRS_SYNC, TIM8_CH1N, SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX, TIM3_ETR, SAI1_SCK_B, EVENTOUT. |+| 41 | PB4 | bidirectional | JTRST debug pin at reset; also 5 V tolerant USB Type-C capable I/O with alternates TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO, USART2_RX, TIM17_BKIN, SAI1_MCLK_B, EVENTOUT. Additional: UCPD1_CC2. |+| 42 | PB5 | bidirectional | 5 V tolerant Fm+ I/O. Alternate: TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD, USART2_CK, I2C3_SDA, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B, EVENTOUT. |+| 43 | PB6 | bidirectional | 5 V tolerant USB Type-C capable I/O. Alternate: TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, TIM8_BKIN2, LPTIM1_ETR, SAI1_FS_B, EVENTOUT. Additional: UCPD1_CC1. |+| 44 | PB7 | bidirectional | 5 V tolerant Fm+ I/O. Alternate: TIM17_CH1N, TIM4_CH2, I2C1_SDA, TIM8_BKIN, USART1_RX, COMP3_OUT, TIM3_CH4, LPTIM1_IN2, UART4_CTS, EVENTOUT. Additional: PVD_IN. |+| 45 | PB8-BOOT0 | bidirectional | Dedicated BOOT0 selection pin at power-up (samples boot mode); afterwards a 5 V tolerant Fm+ GPIO PB8 with alternates TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, SAI1_MCLK_A, EVENTOUT. |+| 46 | PB9 | bidirectional | 5 V tolerant Fm+ I/O. Alternate: TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N, SAI1_FS_A, EVENTOUT. |+| 47 | VSS | power_in | Digital ground. Tie to system ground plane. |+| 48 | VDD | power_in | Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | LQFP-48(7x7) |+| Category | MCU |+| Pins | 48 |++## Ordering variants++- `STM32G431CBT6CBT6`+- `STM32G431CBT6C8T6`+- `STM32G431CBT6C6T6`+- `STM32G431CBT6CBT3`+- `STM32G431CBT6CBU6`+- `STM32G431CBT6C8U6`+- `STM32G431CBT6C6U6`+- `STM32G431CBT6C6T6`+- `STM32G431CBT6C8T6`+- `STM32G431CBT6CBT6`+- `STM32G431CBT6K6U6`+- `STM32G431CBT6K8U6`+- `STM32G431CBT6KBU6`+- `STM32G431CBT6R6T6`+- `STM32G431CBT6R8T6`+- `STM32G431CBT6RBT6`+- `STM32G431CBT6RBI6`+- `STM32G431CBT6M6T6`+- `STM32G431CBT6M8T6`+- `STM32G431CBT6MBT6`+- `STM32G431CBT6V6T6`+- `STM32G431CBT6V8T6`+- `STM32G431CBT6VBT6`++## CAD (KiCad official)++- Symbol: `STM32G431CBT6`+- Footprint: `Package_QFP:LQFP-48_7x7mm_P0.5mm`+- 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/stm32g431cbt6.pdf) (200 pp, sha256 `cabefb21b47dc4c1`, retrieved 2026-08-17, tier: manufacturer)+- **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](docs/stm32g431cbt6-datasheet.pdf)