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stm32f334r8t6

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by Ray

STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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STM32F334R8T6

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

STM32F334R8T6 from STMicroelectronics, in a LQFP-64(10x10). 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 power supply (1.65 V-3.6 V) for RTC and backup registers when VDD is absent.
2 PC13 bidirectional GPIO PC13 (TC 3.3 V I/O). AF: TIM1_CH1N. Additional: RTC_TAMP1/RTC_TS/RTC_OUT/WKUP2. Supplied via power switch - output limited to 2 MHz / 30 pF, cannot source LED current.
3 PC14/OSC32_IN bidirectional GPIO PC14 (TC 3.3 V I/O) or LSE 32.768 kHz crystal input (OSC32_IN). Powered via backup switch.
4 PC15/OSC32_OUT bidirectional GPIO PC15 (TC 3.3 V I/O) or LSE 32.768 kHz crystal output (OSC32_OUT). Powered via backup switch.
5 PF0/OSC_IN bidirectional GPIO PF0 (5 V-tolerant FT) or HSE 4-32 MHz crystal input (OSC_IN). AF: TIM1_CH3N.
6 PF1/OSC_OUT bidirectional GPIO PF1 (5 V-tolerant FT) or HSE crystal output (OSC_OUT).
7 NRST bidirectional Active-low bi-directional device reset input / internal reset output with embedded weak pull-up (~40 kΩ).
8 PC0 bidirectional GPIO PC0 (TTa 3.3 V analog-capable I/O). AF: EVENTOUT, TIM1_CH1. Additional: ADC12_IN6.
9 PC1 bidirectional GPIO PC1 (TTa). AF: EVENTOUT, TIM1_CH2. Additional: ADC12_IN7.
10 PC2 bidirectional GPIO PC2 (TTa). AF: EVENTOUT, TIM1_CH3. Additional: ADC12_IN8.
11 PC3 bidirectional GPIO PC3 (TTa). AF: EVENTOUT, TIM1_CH4, TIM1_BKIN2. Additional: ADC12_IN9.
12 VSSA/VREF- power_in Analog ground and negative ADC/DAC reference voltage (tied together on this package).
13 VDDA/VREF+ power_in Analog supply and positive ADC/DAC reference (2.0-3.6 V; DAC/op-amp/comp require ≥2.4 V).
14 PA0 bidirectional GPIO PA0 (TTa). AF: TIM2_CH1/TIM2_ETR, TSC_G1_IO1, USART2_CTS, EVENTOUT. Additional: ADC1_IN1 (fast), RTC_TAMP2/WKUP1.
15 PA1 bidirectional GPIO PA1 (TTa). AF: TIM2_CH2, TSC_G1_IO2, USART2_RTS_DE, TIM15_CH1N, EVENTOUT. Additional: ADC1_IN2, RTC_REFIN.
16 PA2 bidirectional GPIO PA2 (TTa). AF: TIM2_CH3, TSC_G1_IO3, USART2_TX, COMP2_OUT, TIM15_CH1, EVENTOUT. Additional: ADC1_IN3, COMP2_INM.
17 PA3 bidirectional GPIO PA3 (TTa). AF: TIM2_CH4, TSC_G1_IO4, USART2_RX, TIM15_CH2, EVENTOUT. Additional: ADC1_IN4.
18 VSS power_in Digital ground.
19 VDD power_in Digital power supply, 2.0-3.6 V.
20 PA4 bidirectional GPIO PA4 (TTa; reduced TSC sensitivity - sampling cap recommended). AF: TIM3_CH2, TSC_G2_IO1, SPI1_NSS, USART2_CK, EVENTOUT. Additional: ADC2_IN1, DAC1_OUT1, COMP2/4/6_INM4.
21 PA5 bidirectional GPIO PA5 (TTa; reduced TSC sensitivity). AF: TIM2_CH1/ETR, TSC_G2_IO2, SPI1_SCK, EVENTOUT. Additional: ADC2_IN2, DAC1_OUT2, OPAMP2_VINM.
22 PA6 bidirectional GPIO PA6 (TTa; reduced TSC sensitivity). AF: TIM16_CH1, TIM3_CH1, TSC_G2_IO3, SPI1_MISO, TIM1_BKIN, OPAMP2_DIG, EVENTOUT. Additional: ADC2_IN3, DAC2_OUT1, OPAMP2_VOUT.
23 PA7 bidirectional GPIO PA7 (TTa). AF: TIM17_CH1, TIM3_CH2, TSC_G2_IO4, SPI1_MOSI, TIM1_CH1N, EVENTOUT. Additional: ADC2_IN4, COMP2_INP, OPAMP2_VINP.
24 PC4 bidirectional GPIO PC4 (TTa). AF: EVENTOUT, TIM1_ETR, USART1_TX. Additional: ADC2_IN5.
25 PC5 bidirectional GPIO PC5 (TTa). AF: EVENTOUT, TIM15_BKIN, TSC_G3_IO1, USART1_RX. Additional: ADC2_IN11, OPAMP2_VINM.
26 PB0 bidirectional GPIO PB0 (TTa). AF: TIM3_CH3, TSC_G3_IO2, TIM1_CH2N, EVENTOUT. Additional: ADC1_IN11, COMP4_INP, OPAMP2_VINP.
27 PB1 bidirectional GPIO PB1 (TTa). AF: TIM3_CH4, TSC_G3_IO3, TIM1_CH3N, COMP4_OUT, HRTIM1_SCOUT, EVENTOUT. Additional: ADC1_IN12.
28 PB2 bidirectional GPIO PB2 (TTa). AF: TSC_G3_IO4, HRTIM_SCIN, EVENTOUT. Additional: ADC2_IN12, COMP4_INM.
29 PB10 bidirectional GPIO PB10 (TT 3.3 V). AF: TIM2_CH3, TSC_SYNC, USART3_TX, HRTIM1_FLT3, EVENTOUT.
30 PB11 bidirectional GPIO PB11 (TTa). AF: TIM2_CH4, TSC_G6_IO1, USART3_RX, HRTIM1_FLT4, EVENTOUT. Additional: COMP6_INP.
31 VSS power_in Digital ground.
32 VDD power_in Digital power supply, 2.0-3.6 V.
33 PB12 bidirectional GPIO PB12 (TTa). AF: TSC_G6_IO2, TIM1_BKIN, USART3_CK, HRTIM1_CHC1, EVENTOUT. Additional: ADC2_IN13.
34 PB13 bidirectional GPIO PB13 (TTa). AF: TSC_G6_IO3, TIM1_CH1N, USART3_CTS, HRTIM1_CHC2, EVENTOUT. Additional: ADC1_IN13.
35 PB14 bidirectional GPIO PB14 (TTa). AF: TIM15_CH1, TSC_G6_IO4, TIM1_CH2N, USART3_RTS_DE, HRTIM1_CHD1, EVENTOUT. Additional: ADC2_IN14, OPAMP2_VINP.
36 PB15 bidirectional GPIO PB15 (TTa). AF: TIM15_CH2, TIM15_CH1N, TIM1_CH3N, HRTIM1_CHD2, EVENTOUT. Additional: ADC2_IN15, COMP6_INM, RTC_REFIN.
37 PC6 bidirectional GPIO PC6 (FT 5 V-tolerant). AF: EVENTOUT, TIM3_CH1, HRTIM1_EEV10, COMP6_OUT.
38 PC7 bidirectional GPIO PC7 (FT). AF: EVENTOUT, TIM3_CH2, HRTIM1_FLT5.
39 PC8 bidirectional GPIO PC8 (FT). AF: EVENTOUT, TIM3_CH3, HRTIM1_CHE1.
40 PC9 bidirectional GPIO PC9 (FT). AF: EVENTOUT, TIM3_CH4, HRTIM1_CHE2.
41 PA8 bidirectional GPIO PA8 (FT). AF: MCO, TIM1_CH1, USART1_CK, HRTIM1_CHA1, EVENTOUT.
42 PA9 bidirectional GPIO PA9 (FT). AF: TSC_G4_IO1, TIM1_CH2, USART1_TX, TIM15_BKIN, TIM2_CH3, HRTIM1_CHA2, EVENTOUT.
43 PA10 bidirectional GPIO PA10 (FT). AF: TIM17_BKIN, TSC_G4_IO2, TIM1_CH3, USART1_RX, COMP6_OUT, TIM2_CH4, HRTIM1_CHB1, EVENTOUT.
44 PA11 bidirectional GPIO PA11 (FT). AF: TIM1_CH1N, USART1_CTS, CAN_RX, TIM1_CH4, TIM1_BKIN2, HRTIM1_CHB2, EVENTOUT.
45 PA12 bidirectional GPIO PA12 (FT). AF: TIM16_CH1, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, CAN_TX, TIM1_ETR, HRTIM1_FLT1, EVENTOUT.
46 PA13 bidirectional GPIO PA13 (FT). Default after reset: JTMS/SWDAT (SWD data / JTAG mode select). AF: TIM16_CH1N, TSC_G4_IO3, IR_OUT, USART3_CTS, EVENTOUT.
47 VSS power_in Digital ground.
48 VDD power_in Digital power supply, 2.0-3.6 V.
49 PA14 bidirectional GPIO PA14 (FTf, 5 V-tolerant / Fm+ capable). Default after reset: JTCK/SWCLK. AF: TSC_G4_IO4, I2C1_SDA, TIM1_BKIN, USART2_TX, EVENTOUT.
50 PA15 bidirectional GPIO PA15 (FTf). AF: JTDI, TIM2_CH1/ETR, TSC_SYNC, I2C1_SCL, SPI1_NSS, USART2_RX, TIM1_BKIN, HRTIM1_FLT2, EVENTOUT.
51 PC10 bidirectional GPIO PC10 (FT). AF: EVENTOUT, USART3_TX.
52 PC11 bidirectional GPIO PC11 (FT). AF: EVENTOUT, HRTIM1_EEV2, USART3_RX.
53 PC12 bidirectional GPIO PC12 (FT). AF: EVENTOUT, HRTIM1_EEV1, USART3_CK.
54 PD2 bidirectional GPIO PD2 (FT). AF: EVENTOUT, TIM3_ETR.
55 PB3 bidirectional GPIO PB3 (FT). Default after reset: JTDO/TRACESWO. AF: TIM2_CH2, TSC_G5_IO1, SPI1_SCK, USART2_TX, TIM3_ETR, HRTIM1_SCOUT, HRTIM1_EEV9, EVENTOUT.
56 PB4 bidirectional GPIO PB4 (FT). Default after reset: NJTRST. AF: TIM16_CH1, TIM3_CH1, TSC_G5_IO2, SPI1_MISO, USART2_RX, TIM17_BKIN, HRTIM1_EEV7, EVENTOUT.
57 PB5 bidirectional GPIO PB5 (FT). AF: TIM16_BKIN, TIM3_CH2, I2C1_SMBA, SPI1_MOSI, USART2_CK, TIM17_CH1, HRTIM1_EEV6, EVENTOUT.
58 PB6 bidirectional GPIO PB6 (FTf, Fm+ capable up to 20 mA sink). AF: TIM16_CH1N, TSC_G5_IO3, I2C1_SCL, USART1_TX, HRTIM1_SCIN, HRTIM1_EEV4, EVENTOUT.
59 PB7 bidirectional GPIO PB7 (FTf). AF: TIM17_CH1N, TSC_G5_IO4, I2C1_SDA, USART1_RX, TIM3_CH4, HRTIM1_EEV3, EVENTOUT.
60 BOOT0 input Boot-mode select input (dedicated B-type pin). Sampled at reset to select main Flash / system memory / SRAM boot.
61 PB8 bidirectional GPIO PB8 (FTf, Fm+ capable). AF: TIM16_CH1, TSC_SYNC, I2C1_SCL, USART3_RX, CAN_RX, TIM1_BKIN, HRTIM1_EEV8, EVENTOUT.
62 PB9 bidirectional GPIO PB9 (FTf). AF: TIM17_CH1, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, CAN_TX, HRTIM1_EEV5, EVENTOUT.
63 VSS power_in Digital ground.
64 VDD power_in Digital power supply, 2.0-3.6 V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-64(10x10)
Category MCU
Pins 64

Ordering variants

  • STM32F334R8T6
  • STM32F334R8T6R6T6
  • STM32F334R8T6R4T6
  • STM32F334R8T6C8T6
  • STM32F334R8T6C6T6
  • STM32F334R8T6C4T6
  • STM32F334R8T6K8T6
  • STM32F334R8T6K6T6
  • STM32F334R8T6K4T6
  • STM32F334R8T6R8Y6

CAD (KiCad official)

  • Symbol: STM32F334R8T6
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (None pp, sha256 d1d9456eecc89f94, 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

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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