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STM32L412KBU6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). 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
markdownSTM32L412KBU6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-32(5x5)
STM32L412KBU6 from STMicroelectronics, in a UFQFPN-32(5x5). 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 | VDD | power_in | Main supply voltage (1.71 V to 3.6 V). |
| 2 | PC14-OSC32_IN | bidirectional | Port C pin 14, 32 kHz oscillator input; alternate functions: EVENTOUT; additional functions: OSC32_IN. |
| 3 | PC15-OSC32_OUT | bidirectional | Port C pin 15, 32 kHz oscillator output; alternate functions: EVENTOUT; additional functions: OSC32_OUT. |
| 4 | NRST | bidirectional | Active low reset input with embedded weak pull-up resistor. |
| 5 | VDDA/VREF+ | power_in | Analog supply voltage (1.62 V to 3.6 V when ADC/COMP used) and positive reference for ADC. |
| 6 | PA0 | bidirectional | Port A pin 0; alternate functions: TIM2_CH1, USART2_CTS, COMP1_OUT, TIM2_ETR, EVENTOUT; additional functions: OPAMP1_VINP, COMP1_INM, ADC1_IN5, RTC_TAMP2/WKUP1. |
| 7 | PA1 | bidirectional | Port A pin 1; alternate functions: TIM2_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS_DE, TIM15_CH1N, EVENTOUT; additional functions: OPAMP1_VINM, COMP1_INP, ADC1_IN6. |
| 8 | PA2 | bidirectional | Port A pin 2; alternate functions: TIM2_CH3, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS, TIM15_CH1, EVENTOUT; additional functions: ADC12_IN7, WKUP4/LSCO. |
| 9 | PA3 | bidirectional | Port A pin 3 (3.6 V tolerant); alternate functions: TIM2_CH4, USART2_RX, LPUART1_RX, QUADSPI_CLK, TIM15_CH2, EVENTOUT; additional functions: OPAMP1_VOUT, ADC12_IN8. |
| 10 | PA4 | bidirectional | Port A pin 4 (3.6 V tolerant); alternate functions: SPI1_NSS, USART2_CK, LPTIM2_OUT, EVENTOUT; additional functions: COMP1_INM, ADC12_IN9. |
| 11 | PA5 | bidirectional | Port A pin 5 (3.6 V tolerant); alternate functions: TIM2_CH1, TIM2_ETR, SPI1_SCK, LPTIM2_ETR, EVENTOUT; additional functions: COMP1_INM, ADC12_IN10. |
| 12 | PA6 | bidirectional | Port A pin 6; alternate functions: TIM1_BKIN, SPI1_MISO, COMP1_OUT, USART3_CTS, LPUART1_CTS, QUADSPI_BK1_IO3, TIM16_CH1, EVENTOUT; additional functions: ADC12_IN11. |
| 13 | PA7 | bidirectional | Port A pin 7 (FM+ capable); alternate functions: TIM1_CH1N, I2C3_SCL, SPI1_MOSI, QUADSPI_BK1_IO2, EVENTOUT; additional functions: ADC12_IN12. |
| 14 | PB0 | bidirectional | Port B pin 0; alternate functions: TRACED0, TIM1_CH2N, SPI1_NSS, USART3_CK, QUADSPI_BK1_IO1, COMP1_OUT, EVENTOUT; additional functions: ADC12_IN15. |
| 15 | PB1 | bidirectional | Port B pin 1; alternate functions: TRACED1, TIM1_CH3N, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0, LPTIM2_IN1, EVENTOUT; additional functions: COMP1_INM, ADC12_IN16. |
| 16 | VSS | power_in | Ground (0 V). |
| 17 | VDD | power_in | Main supply voltage (1.71 V to 3.6 V). |
| 18 | PA8 | bidirectional | Port A pin 8; alternate functions: MCO, TIM1_CH1, USART1_CK, LPTIM2_OUT, EVENTOUT. |
| 19 | PA9 | bidirectional | Port A pin 9 (FM+ capable); alternate functions: TIM1_CH2, I2C1_SCL, USART1_TX, TIM15_BKIN, EVENTOUT. |
| 20 | PA10 | bidirectional | Port A pin 10 (FM+ capable); alternate functions: TIM1_CH3, I2C1_SDA, USART1_RX, USB_CRS_SYNC, EVENTOUT. |
| 21 | PA11 | bidirectional | Port A pin 11 (USB function); alternate functions: TIM1_CH4, TIM1_BKIN2, SPI1_MISO, COMP1_OUT, USART1_CTS, USB_DM, TIM1_BKIN2_COMP1, EVENTOUT. |
| 22 | PA12 | bidirectional | Port A pin 12 (USB function); alternate functions: TIM1_ETR, SPI1_MOSI, USART1_RTS_DE, USB_DP, EVENTOUT. |
| 23 | PA13 | bidirectional | Port A pin 13, JTAG test mode select / SWD I/O; alternate functions: JTMS/SWDIO, IR_OUT, USB_NOE, EVENTOUT. |
| 24 | PA14 | bidirectional | Port A pin 14, JTAG test clock / SWD clock; alternate functions: JTCK/SWCLK, LPTIM1_OUT, I2C1_SMBA, EVENTOUT. |
| 25 | PA15 | bidirectional | Port A pin 15, JTAG test data in; alternate functions: JTDI, TIM2_CH1, TIM2_ETR, USART2_RX, SPI1_NSS, USART3_RTS_DE, TSC_G3_IO1, EVENTOUT. |
| 26 | PB3 | bidirectional | Port B pin 3, JTAG test data out / trace serial wire output; alternate functions: JTDO/TRACESWO, TIM2_CH2, SPI1_SCK, USART1_RTS_DE, EVENTOUT. |
| 27 | PB4 | bidirectional | Port B pin 4, JTAG nRESET (FM+ capable); alternate functions: NJTRST, I2C3_SDA, SPI1_MISO, USART1_CTS, TSC_G2_IO1, EVENTOUT. |
| 28 | PB5 | bidirectional | Port B pin 5; alternate functions: TRACED2, LPTIM1_IN1, I2C1_SMBA, SPI1_MOSI, USART1_CK, TSC_G2_IO2, TIM16_BKIN, EVENTOUT. |
| 29 | PB6 | bidirectional | Port B pin 6 (FM+ capable); alternate functions: TRACED3, LPTIM1_ETR, I2C1_SCL, USART1_TX, TSC_G2_IO3, TIM16_CH1N, EVENTOUT. |
| 30 | PB7 | bidirectional | Port B pin 7 (FM+ capable, PVD input); alternate functions: TRACECK, LPTIM1_IN2, I2C1_SDA, USART1_RX, TSC_G2_IO4, EVENTOUT; additional functions: PVD_IN. |
| 31 | PH3-BOOT0 | bidirectional | Port H pin 3, boot mode selection; alternate functions: EVENTOUT. |
| 32 | VSS | power_in | Ground (0 V). |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UFQFPN-32(5x5) |
| Category | Embedded Processors & Controllers |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
STM32L412KBU6 - Footprint:
Package_DFN_QFN:UFQFPN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm - 3D model: UFQFPN-32(5x5) (KiCad packages3D, STEP)
- 3D model files:
stm32l412kbu6-etched.step/stm32l412kbu6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32l412kbu6.step/stm32l412kbu6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (193 pp, sha256
5104ae3be2936485, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).