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STM32F091RCT6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM32F091RCT6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)
STM32F091RCT6 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 | VBAT | power_in | Backup power supply pin (1.65-3.6 V) that powers the RTC, external 32.768 kHz oscillator and backup registers when VDD is not present. |
| 2 | PC13 | bidirectional | Standard 3.3 V I/O (TC) supplied through the RTC power switch, limited to 3 mA sink (max 2 MHz/30 pF in output mode); usable as GPIO or as WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT alternate functions. |
| 3 | PC14-OSC32_IN (PC14) | bidirectional | Standard 3.3 V I/O (TC) supplied through the RTC power switch, usable as GPIO or as the 32.768 kHz LSE crystal oscillator input (OSC32_IN). |
| 4 | PC15-OSC32_OUT (PC15) | bidirectional | Standard 3.3 V I/O (TC) supplied through the RTC power switch, usable as GPIO or as the 32.768 kHz LSE crystal oscillator output (OSC32_OUT). |
| 5 | PF0-OSC_IN (PF0) | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) usable as GPIO with CRS_SYNC or I2C1_SDA alternate function, or as the 4-32 MHz HSE crystal oscillator input (OSC_IN). |
| 6 | PF1-OSC_OUT (PF1) | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) usable as GPIO with I2C1_SCL alternate function, or as the 4-32 MHz HSE crystal oscillator output (OSC_OUT). |
| 7 | NRST | bidirectional | Bidirectional reset pin with embedded weak pull-up resistor; active-low device reset input and internal reset output. |
| 8 | PC0 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with EVENTOUT, USART6_TX or USART7_TX alternate functions and ADC_IN10 additional analog input. |
| 9 | PC1 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with EVENTOUT, USART6_RX or USART7_RX alternate functions and ADC_IN11 additional analog input. |
| 10 | PC2 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI2_MISO/I2S2_MCK, EVENTOUT or USART8_TX alternate functions and ADC_IN12 additional analog input. |
| 11 | PC3 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI2_MOSI/I2S2_SD, EVENTOUT or USART8_RX alternate functions and ADC_IN13 additional analog input. |
| 12 | VSSA | power_in | Analog ground supply pin for the ADC, DAC, comparators and clock circuits. |
| 13 | VDDA | power_in | Analog supply pin, from VDD to 3.6 V (2.4-3.6 V minimum when the ADC or DAC is used) for ADC, DAC, comparators, RCs and PLL. |
| 14 | PA0 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with USART2_CTS, TIM2_CH1_ETR, TSC_G1_IO1 or USART4_TX alternate functions; additional functions COMP1_OUT, RTC_TAMP2, WKUP1, ADC_IN0 and COMP1_INM6. |
| 15 | PA1 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with USART2_RTS, TIM2_CH2, TIM15_CH1N, TSC_G1_IO2, USART4_RX or EVENTOUT alternate functions; additional functions ADC_IN1 and COMP1_INP. |
| 16 | PA2 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with USART2_TX, TIM2_CH3, TIM15_CH1 or TSC_G1_IO3 alternate functions; additional functions COMP2_OUT, ADC_IN2, WKUP4 and COMP2_INM6. |
| 17 | PA3 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with USART2_RX, TIM2_CH4, TIM15_CH2 or TSC_G1_IO4 alternate functions; additional functions ADC_IN3 and COMP2_INP. |
| 18 | VSS | power_in | Digital ground supply pin. |
| 19 | VDD | power_in | Digital power supply pin, 2.0 V to 3.6 V, for I/Os and the internal regulator. |
| 20 | PA4 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI1_NSS/I2S1_WS, TSC_G2_IO1, TIM14_CH1, USART2_CK or USART6_TX alternate functions; additional functions COMP1_INM4, COMP2_INM4, ADC_IN4 and DAC_OUT1. |
| 21 | PA5 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI1_SCK/I2S1_CK, CEC, TIM2_CH1_ETR, TSC_G2_IO2 or USART6_RX alternate functions; additional functions COMP1_INM5, COMP2_INM5, ADC_IN5 and DAC_OUT2. |
| 22 | PA6 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, TSC_G2_IO3, TIM16_CH1, COMP1_OUT, EVENTOUT or USART3_CTS alternate functions; additional function ADC_IN6. |
| 23 | PA7 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM14_CH1, TIM1_CH1N, TIM17_CH1, COMP2_OUT, TSC_G2_IO4 or EVENTOUT alternate functions; additional function ADC_IN7. |
| 24 | PC4 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with EVENTOUT or USART3_TX alternate functions and ADC_IN14 additional analog input. |
| 25 | PC5 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with TSC_G3_IO1 or USART3_RX alternate functions; additional functions ADC_IN15 and WKUP5. |
| 26 | PB0 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with TIM3_CH3, TIM1_CH2N, TSC_G3_IO2, EVENTOUT or USART3_CK alternate functions and ADC_IN8 additional analog input. |
| 27 | PB1 | bidirectional | 3.3 V-tolerant ADC-connected I/O (TTa) with TIM3_CH4, USART3_RTS, TIM14_CH1, TIM1_CH3N or TSC_G3_IO3 alternate functions and ADC_IN9 additional analog input. |
| 28 | PB2 | bidirectional | 5 V-tolerant I/O (FT) with TSC_G3_IO4 alternate function. |
| 29 | PB10 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with SPI2_SCK/I2S2_CK, I2C2_SCL, USART3_TX, CEC, TSC_SYNC or TIM2_CH3 alternate functions. |
| 30 | PB11 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with USART3_RX, TIM2_CH4, EVENTOUT, TSC_G6_IO1 or I2C2_SDA alternate functions. |
| 31 | VSS | power_in | Digital ground supply pin. |
| 32 | VDD | power_in | Digital power supply pin, 2.0 V to 3.6 V. |
| 33 | PB12 | bidirectional | 5 V-tolerant I/O (FT) with TIM1_BKIN, TIM15_BKIN, SPI2_NSS/I2S2_WS, USART3_CK, TSC_G6_IO2 or EVENTOUT alternate functions. |
| 34 | PB13 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with SPI2_SCK/I2S2_CK, I2C2_SCL, USART3_CTS, TIM1_CH1N or TSC_G6_IO3 alternate functions. |
| 35 | PB14 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with SPI2_MISO/I2S2_MCK, I2C2_SDA, USART3_RTS, TIM1_CH2N, TIM15_CH1 or TSC_G6_IO4 alternate functions. |
| 36 | PB15 | bidirectional | 5 V-tolerant I/O (FT) with SPI2_MOSI/I2S2_SD, TIM1_CH3N, TIM15_CH1N or TIM15_CH2 alternate functions; additional functions WKUP7 and RTC_REFIN. |
| 37 | PC6 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with TIM3_CH1 or USART7_TX alternate functions. |
| 38 | PC7 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with TIM3_CH2 or USART7_RX alternate functions. |
| 39 | PC8 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with TIM3_CH3 or USART8_TX alternate functions. |
| 40 | PC9 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with TIM3_CH4 or USART8_RX alternate functions. |
| 41 | PA8 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART1_CK, TIM1_CH1, EVENTOUT, MCO or CRS_SYNC alternate functions. |
| 42 | PA9 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART1_TX, TIM1_CH2, TIM15_BKIN, MCO, TSC_G4_IO1 or I2C1_SCL alternate functions; also usable for USART bootloader reprogramming. |
| 43 | PA10 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART1_RX, TIM1_CH3, TIM17_BKIN, TSC_G4_IO2 or I2C1_SDA alternate functions. |
| 44 | PA11 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with CAN_RX, USART1_CTS, TIM1_CH4, COMP1_OUT, TSC_G4_IO3, EVENTOUT or I2C2_SCL alternate functions. |
| 45 | PA12 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with CAN_TX, USART1_RTS, TIM1_ETR, COMP2_OUT, TSC_G4_IO4, EVENTOUT or I2C2_SDA alternate functions. |
| 46 | PA13 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with IR_OUT or SWDIO alternate function; after reset configured as SWDIO with the internal pull-up activated. |
| 47 | VSS | power_in | Digital ground supply pin. |
| 48 | VDDIO2 | power_in | Independent digital power supply pin, 1.65 V to 3.6 V, for the VDDIO2-marked I/Os; must not be supplied unless VDD is present. |
| 49 | PA14 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART2_TX or SWCLK alternate function; after reset configured as SWCLK with the internal pull-down activated. |
| 50 | PA15 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with SPI1_NSS/I2S1_WS, USART2_RX, USART4_RTS, TIM2_CH1_ETR or EVENTOUT alternate functions. |
| 51 | PC10 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART3_TX or USART4_TX alternate functions. |
| 52 | PC11 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART3_RX or USART4_RX alternate functions. |
| 53 | PC12 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART3_CK, USART4_CK or USART5_TX alternate functions. |
| 54 | PD2 | bidirectional | 5 V-tolerant I/O (FT), supplied from VDDIO2, with USART3_RTS, TIM3_ETR or USART5_RX alternate functions. |
| 55 | PB3 | bidirectional | 5 V-tolerant I/O (FT) with SPI1_SCK/I2S1_CK, TIM2_CH2, TSC_G5_IO1, EVENTOUT or USART5_TX alternate functions. |
| 56 | PB4 | bidirectional | 5 V-tolerant I/O (FT) with SPI1_MISO/I2S1_MCK, TIM17_BKIN, TIM3_CH1, TSC_G5_IO2, EVENTOUT or USART5_RX alternate functions. |
| 57 | PB5 | bidirectional | 5 V-tolerant I/O (FT) with SPI1_MOSI/I2S1_SD, I2C1_SMBA, TIM16_BKIN, TIM3_CH2 or USART5_CK_RTS alternate functions; additional function WKUP6. |
| 58 | PB6 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with I2C1_SCL, USART1_TX, TIM16_CH1N or TSC_G5_IO3 alternate functions; also usable for I2C bootloader reprogramming. |
| 59 | PB7 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with I2C1_SDA, USART1_RX, USART4_CTS, TIM17_CH1N or TSC_G5_IO4 alternate functions; also usable for I2C bootloader reprogramming. |
| 60 | PF11-BOOT0 | bidirectional | 5 V-tolerant I/O (FT) that also serves as the BOOT0 boot memory selection pin sampled at reset. |
| 61 | PB8 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with I2C1_SCL, CEC, TIM16_CH1, TSC_SYNC or CAN_RX alternate functions. |
| 62 | PB9 | bidirectional | 5 V-tolerant, Fast Mode Plus capable I/O (FTf) with SPI2_NSS/I2S2_WS, I2C1_SDA, IR_OUT, TIM17_CH1, EVENTOUT or CAN_TX alternate functions. |
| 63 | VSS | power_in | Digital ground supply pin. |
| 64 | VDD | power_in | Digital power supply pin, 2.0 V to 3.6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-64(10x10) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |
CAD (KiCad official)
- Symbol:
STM32F091RCT6 - Footprint:
Package_QFP:LQFP-64_10x10mm_P0.5mm - 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
- 3D model files:
stm32f091rct6-etched.step/stm32f091rct6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32f091rct6.step/stm32f091rct6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (128 pp, sha256
f96a82f50344c619, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).