# STM32G071RBT3

**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)

STM32G071RBT3 from STMicroelectronics, in a LQFP-64(10x10). 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 |
|---|---|---|---|
| 1 | PC11 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions USART3_RX, USART4_RX, TIM1_CH4. |
| 2 | PC12 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions LPTIM1_IN1, UCPD1_FRSTX, TIM14_CH1. |
| 3 | PC13 | bidirectional | 5 V-tolerant (FT) I/O supplied through the power switch, which sinks only 3 mA, so output use is limited to 2 MHz with 30 pF maximum load and it must not drive LEDs or act as a current source; additional functions TAMP_IN1, RTC_TS, RTC_OUT1, WKUP2, alternate TIM1_BKIN. |
| 4 | PC14-OSC32_IN | bidirectional | 5 V-tolerant (FT) I/O on the power-switch domain (same 3 mA sink and 2 MHz / 30 pF output limits as PC13); additional function OSC32_IN (32.768 kHz LSE oscillator input), alternate TIM1_BKIN2. |
| 5 | PC15-OSC32_OUT | bidirectional | 5 V-tolerant (FT) I/O on the power-switch domain (same 3 mA sink and 2 MHz / 30 pF output limits as PC13); additional function OSC32_OUT (LSE oscillator output), alternates OSC32_EN, OSC_EN, TIM15_BKIN. |
| 6 | VBAT | power_in | Backup supply 1.55 V to 3.6 V for the RTC, TAMP, LSE and backup registers when VDD is not present. |
| 7 | VREF+ | power_in | Analog reference input for ADC/DAC/COMP: must equal VDDA when VDDA < 2 V and lie between 2 V and VDDA when VDDA >= 2 V; also VREF_OUT when the internal voltage reference buffer is enabled. |
| 8 | VDD/VDDA | power_in | Main supply 1.7 V to 3.6 V (VDD, also VDDIO1 for the I/Os) and analog supply VDDA, which is 1.62 V minimum for ADC/COMP, 1.8 V for DAC and 2.4 V for VREFBUF. |
| 9 | VSS/VSSA | power_in | Ground reference for the digital and analog circuits (all voltages are referenced to VSS). |
| 10 | PF0-OSC_IN | bidirectional | 5 V-tolerant (FT) I/O; additional function OSC_IN for the 4 to 48 MHz crystal oscillator, alternate TIM14_CH1. |
| 11 | PF1-OSC_OUT | bidirectional | 5 V-tolerant (FT) I/O; additional function OSC_OUT for the 4 to 48 MHz crystal oscillator, alternates OSC_EN and TIM15_CH1N. |
| 12 | PF2-NRST | bidirectional | Bidirectional reset pin with embedded weak pull-up resistor (FT I/O); alternate function MCO. |
| 13 | PC0 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions LPTIM1_IN1, LPUART1_RX, LPTIM2_IN1. |
| 14 | PC1 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions LPTIM1_OUT, LPUART1_TX, TIM15_CH1. |
| 15 | PC2 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions LPTIM1_IN2, SPI2_MISO, TIM15_CH2. |
| 16 | PC3 | bidirectional | 5 V-tolerant (FT) I/O; alternate functions LPTIM1_ETR, SPI2_MOSI, LPTIM2_ETR. |
| 17 | PA0 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions ADC_IN0, COMP1_INM, TAMP_IN2, WKUP1; alternates SPI2_SCK, USART2_CTS, TIM2_CH1_ETR, USART4_TX, LPTIM1_OUT, UCPD2_FRSTX, COMP1_OUT. |
| 18 | PA1 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions ADC_IN1, COMP1_INP; alternates SPI1_SCK/I2S1_CK, USART2_RTS_DE_CK, TIM2_CH2, USART4_RX, TIM15_CH1N, I2C1_SMBA, EVENTOUT. |
| 19 | PA2 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions ADC_IN2, COMP2_INM, WKUP4, LSCO; alternates SPI1_MOSI/I2S1_SD, USART2_TX, TIM2_CH3, UCPD1_FRSTX, TIM15_CH1, LPUART1_TX, COMP2_OUT. |
| 20 | PA3 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions ADC_IN3, COMP2_INP; alternates SPI2_MISO, USART2_RX, TIM2_CH4, UCPD2_FRSTX, TIM15_CH2, LPUART1_RX, EVENTOUT. |
| 21 | PA4 | bidirectional | 3.6 V-tolerant (TT_a) I/O with analog switch function; additional functions ADC_IN4, DAC_OUT1, RTC_OUT2; alternates SPI1_NSS/I2S1_WS, SPI2_MOSI, TIM14_CH1, LPTIM2_OUT, UCPD2_FRSTX, EVENTOUT. |
| 22 | PA5 | bidirectional | 3.6 V-tolerant (TT_a) I/O with analog switch function; additional functions ADC_IN5, DAC_OUT2; alternates SPI1_SCK/I2S1_CK, CEC, TIM2_CH1_ETR, USART3_TX, LPTIM2_ETR, UCPD1_FRSTX, EVENTOUT. |
| 23 | PA6 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function ADC_IN6; alternates SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, USART3_CTS, TIM16_CH1, LPUART1_CTS, COMP1_OUT. |
| 24 | PA7 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function ADC_IN7; alternates SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM1_CH1N, TIM14_CH1, TIM17_CH1, UCPD1_FRSTX, COMP2_OUT. |
| 25 | PC4 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions COMP1_INM, ADC_IN17; alternates USART3_TX, USART1_TX, TIM2_CH1_ETR. |
| 26 | PC5 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions COMP1_INP, ADC_IN18, WKUP5; alternates USART3_RX, USART1_RX, TIM2_CH2. |
| 27 | PB0 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function ADC_IN8; alternates SPI1_NSS/I2S1_WS, TIM3_CH3, TIM1_CH2N, USART3_RX, LPTIM1_OUT, UCPD1_FRSTX, COMP1_OUT. |
| 28 | PB1 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions COMP1_INM, ADC_IN9; alternates TIM14_CH1, TIM3_CH4, TIM1_CH3N, USART3_RTS_DE_CK, LPTIM2_IN1, LPUART1_RTS_DE, EVENTOUT. |
| 29 | PB2 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional functions COMP1_INP, ADC_IN10; alternates SPI2_MISO, USART3_TX, LPTIM1_OUT, EVENTOUT. |
| 30 | PB10 | bidirectional | 5 V-tolerant (FT_fa) I/O, Fm+ capable (1 MHz I2C) with analog switch function; additional function ADC_IN11; alternates CEC, LPUART1_RX, TIM2_CH3, USART3_TX, SPI2_SCK, I2C2_SCL, COMP1_OUT. |
| 31 | PB11 | bidirectional | 5 V-tolerant (FT_fa) I/O, Fm+ capable with analog switch function; additional function ADC_IN15; alternates SPI2_MOSI, LPUART1_TX, TIM2_CH4, USART3_RX, I2C2_SDA, COMP2_OUT. |
| 32 | PB12 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function ADC_IN16; alternates SPI2_NSS, LPUART1_RTS_DE, TIM1_BKIN, TIM15_BKIN, UCPD2_FRSTX, EVENTOUT. |
| 33 | PB13 | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; alternates SPI2_SCK, LPUART1_CTS, TIM1_CH1N, USART3_CTS, TIM15_CH1N, I2C2_SCL, EVENTOUT. |
| 34 | PB14 | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; alternates SPI2_MISO, UCPD1_FRSTX, TIM1_CH2N, USART3_RTS_DE_CK, TIM15_CH1, I2C2_SDA, EVENTOUT. |
| 35 | PB15 | bidirectional | 5 V-tolerant (FT_c) I/O, USB Type-C PD capable; may have an internal pull-down active at reset depending on PB0 level (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional functions UCPD1_CC2, RTC_REFIN; alternates SPI2_MOSI, TIM1_CH3N, TIM15_CH1N, TIM15_CH2, EVENTOUT. |
| 36 | PA8 | bidirectional | 5 V-tolerant (FT_c) I/O, USB Type-C PD capable; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD1_CC1; alternates MCO, SPI2_NSS, TIM1_CH1, LPTIM2_OUT, EVENTOUT. |
| 37 | PA9 | bidirectional | 5 V-tolerant (FT_fd) I/O, Fm+ capable with USB Type-C dead-battery function; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD1_DBCC1; alternates MCO, USART1_TX, TIM1_CH2, SPI2_MISO, TIM15_BKIN, I2C1_SCL, EVENTOUT. |
| 38 | PC6 | bidirectional | 5 V-tolerant (FT) I/O; additional function UCPD1_FRSTX alternate; alternates UCPD1_FRSTX, TIM3_CH1, TIM2_CH3. |
| 39 | PC7 | bidirectional | 5 V-tolerant (FT) I/O; alternates UCPD2_FRSTX, TIM3_CH2, TIM2_CH4. |
| 40 | PD8 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART3_TX, SPI1_SCK/I2S1_CK, LPTIM1_OUT. |
| 41 | PD9 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART3_RX, SPI1_NSS/I2S1_WS, TIM1_BKIN2. |
| 42 | PA10 | bidirectional | 5 V-tolerant (FT_fd) I/O, Fm+ capable with USB Type-C dead-battery function; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD1_DBCC2; alternates SPI2_MOSI, USART1_RX, TIM1_CH3, TIM17_BKIN, I2C1_SDA, EVENTOUT. |
| 43 | PA11 [PA9] | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; default pin for PA11, remappable with PA9 via SYSCFG_CFGR1; alternates SPI1_MISO/I2S1_MCK, USART1_CTS, TIM1_CH4, TIM1_BKIN2, I2C2_SCL, COMP1_OUT. |
| 44 | PA12 [PA10] | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; default pin for PA12, remappable with PA10 via SYSCFG_CFGR1; alternates SPI1_MOSI/I2S1_SD, USART1_RTS_DE_CK, TIM1_ETR, I2S_CKIN, I2C2_SDA, COMP2_OUT. |
| 45 | PA13 | bidirectional | 5 V-tolerant (FT) I/O; reset function is SWDIO (internal pull-up active at reset); alternates IR_OUT, EVENTOUT. |
| 46 | PA14-BOOT0 | bidirectional | 5 V-tolerant (FT) I/O; reset function is SWCLK (internal pull-down active at reset); additional function BOOT0 (boot pin), alternates USART2_TX, EVENTOUT. |
| 47 | PA15 | bidirectional | 5 V-tolerant (FT) I/O; alternates SPI1_NSS/I2S1_WS, USART2_RX, TIM2_CH1_ETR, USART4_RTS_DE_CK, USART3_RTS_DE_CK, EVENTOUT. |
| 48 | PC8 | bidirectional | 5 V-tolerant (FT) I/O; alternates UCPD2_FRSTX, TIM3_CH3, TIM1_CH1. |
| 49 | PC9 | bidirectional | 5 V-tolerant (FT) I/O; alternates I2S_CKIN, TIM3_CH4, TIM1_CH2. |
| 50 | PD0 | bidirectional | 5 V-tolerant (FT_c) I/O, USB Type-C PD capable; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD2_CC1; alternates EVENTOUT, SPI2_NSS, TIM16_CH1. |
| 51 | PD1 | bidirectional | 5 V-tolerant (FT_d) I/O with USB Type-C dead-battery function; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD2_DBCC1; alternates EVENTOUT, SPI2_SCK, TIM17_CH1. |
| 52 | PD2 | bidirectional | 5 V-tolerant (FT_c) I/O, USB Type-C PD capable; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD2_CC2; alternates USART3_RTS_DE_CK, TIM3_ETR, TIM1_CH1N. |
| 53 | PD3 | bidirectional | 5 V-tolerant (FT_d) I/O with USB Type-C dead-battery function; may have an internal pull-down active at reset (disable via UCPDx_STROBE in SYSCFG_CFGR1); additional function UCPD2_DBCC2; alternates USART2_CTS, SPI2_MISO, TIM1_CH2N. |
| 54 | PD4 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART2_RTS_DE_CK, SPI2_MOSI, TIM1_CH3N. |
| 55 | PD5 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART2_TX, SPI1_MISO/I2S1_MCK, TIM1_BKIN. |
| 56 | PD6 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART2_RX, SPI1_MOSI/I2S1_SD, LPTIM2_OUT. |
| 57 | PB3 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function COMP2_INM; alternates SPI1_SCK/I2S1_CK, TIM1_CH2, TIM2_CH2, USART1_RTS_DE_CK, EVENTOUT. |
| 58 | PB4 | bidirectional | 5 V-tolerant (FT_a) I/O with analog switch function; additional function COMP2_INP; alternates SPI1_MISO/I2S1_MCK, TIM3_CH1, USART1_CTS, TIM17_BKIN, EVENTOUT. |
| 59 | PB5 | bidirectional | 5 V-tolerant (FT) I/O; additional function WKUP6 (wakeup); alternates SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM16_BKIN, LPTIM1_IN1, I2C1_SMBA, COMP2_OUT. |
| 60 | PB6 | bidirectional | 5 V-tolerant (FT_fa) I/O, Fm+ capable with analog switch function; additional function COMP2_INP; alternates USART1_TX, TIM1_CH3, TIM16_CH1N, SPI2_MISO, LPTIM1_ETR, I2C1_SCL, EVENTOUT. |
| 61 | PB7 | bidirectional | 5 V-tolerant (FT_fa) I/O, Fm+ capable with analog switch function; additional functions COMP2_INM, PVD_IN; alternates USART1_RX, SPI2_MOSI, TIM17_CH1N, USART4_CTS, LPTIM1_IN2, I2C1_SDA, EVENTOUT. |
| 62 | PB8 | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; alternates CEC, SPI2_SCK, TIM16_CH1, USART3_TX, TIM15_BKIN, I2C1_SCL, EVENTOUT. |
| 63 | PB9 | bidirectional | 5 V-tolerant (FT_f) I/O, Fm+ capable; alternates IR_OUT, UCPD2_FRSTX, TIM17_CH1, USART3_RX, SPI2_NSS, I2C1_SDA, EVENTOUT. |
| 64 | PC10 | bidirectional | 5 V-tolerant (FT) I/O; alternates USART3_TX, USART4_TX, TIM1_CH3. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-64(10x10) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |

## CAD (KiCad official)

- Symbol: `STM32G071RBT3`
- Footprint: `Package_QFP:LQFP-64_10x10mm_P0.5mm`
- 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files: `stm32g071rbt3-etched.step` / `stm32g071rbt3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32g071rbt3.step` / `stm32g071rbt3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907820519460864) (133 pp, sha256 `96d7e9ca1500e794`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/stm32g071rbt3-datasheet.pdf)