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STM32L051K6U6
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STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
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README.mdadded+69@@ -0,0 +1,69 @@+# STM32L051K6U6++**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · UFQFPN-32(5x5)++STM32L051K6U6 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 | Digital power supply pin; VDD operating range is 1.65 V to 3.6 V (1.8 V min at power-on if BOR is enabled, down to 1.65 V otherwise). |+| 2 | PC14-OSC32_IN | bidirectional | 5V-tolerant (FT) GPIO PC14 after reset, alternatively usable as OSC32_IN, the LSE 32.768 kHz oscillator input. |+| 3 | PC15-OSC32_OUT | bidirectional | Standard 3.3V I/O (TC) GPIO PC15 after reset, alternatively usable as OSC32_OUT, the LSE 32.768 kHz oscillator output. |+| 4 | NRST | bidirectional | Bidirectional reset pin with an embedded weak pull-up resistor; driving it low resets the device (VIL(NRST) max 0.8 V, VIH(NRST) min 1.4 V). |+| 5 | VDDA | power_in | Analog power supply pin (1.65 V to 3.6 V) for the ADC, comparators, RC oscillators and PLL; must be kept at the same voltage as VDD (max 300 mV difference). |+| 6 | PA0 | bidirectional | Standard 3.3V I/O (TC), fast ADC channel; alternate functions TIM2_CH1, USART2_CTS, TIM2_ETR, COMP1_OUT; additional functions COMP1_INM6, ADC_IN0, RTC_TAMP2/WKUP1. |+| 7 | PA1 | bidirectional | 5V-tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH2, USART2_RTS_DE, TIM21_ETR; additional functions COMP1_INP, ADC_IN1. |+| 8 | PA2 | bidirectional | 5V-tolerant I/O (FT); alternate functions TIM21_CH1, TIM2_CH3, USART2_TX, COMP2_OUT; additional functions COMP2_INM6, ADC_IN2. |+| 9 | PA3 | bidirectional | 5V-tolerant I/O (FT); alternate functions TIM21_CH2, TIM2_CH4, USART2_RX; additional functions COMP2_INP, ADC_IN3. |+| 10 | PA4 | bidirectional | Standard 3.3V I/O (TC), fast ADC channel; alternate functions SPI1_NSS, USART2_CK, TIM22_ETR; additional functions COMP1_INM4, COMP2_INM4, ADC_IN4. |+| 11 | PA5 | bidirectional | Standard 3.3V I/O (TC), fast ADC channel; alternate functions SPI1_SCK, TIM2_ETR, TIM2_CH1; additional functions COMP1_INM5, COMP2_INM5, ADC_IN5. |+| 12 | PA6 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MISO, LPUART1_CTS, TIM22_CH1, EVENTOUT, COMP1_OUT; additional function ADC_IN6. |+| 13 | PA7 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MOSI, TIM22_CH2, EVENTOUT, COMP2_OUT; additional function ADC_IN7. |+| 14 | PB0 | bidirectional | 5V-tolerant I/O (FT); alternate function EVENTOUT; additional functions ADC_IN8, VREF_OUT. |+| 15 | PB1 | bidirectional | 5V-tolerant I/O (FT); alternate function LPUART1_RTS_DE; additional functions ADC_IN9, VREF_OUT. |+| 16 | PB2 | bidirectional | 5V-tolerant I/O (FT); alternate function LPTIM1_OUT. |+| 17 | VDD | power_in | Digital power supply pin; VDD operating range is 1.65 V to 3.6 V (1.8 V min at power-on if BOR is enabled, down to 1.65 V otherwise). |+| 18 | PA8 | bidirectional | 5V-tolerant I/O (FT); alternate functions MCO, EVENTOUT, USART1_CK. |+| 19 | PA9 | bidirectional | 5V-tolerant I/O (FT); alternate functions MCO, USART1_TX. |+| 20 | PA10 | bidirectional | 5V-tolerant I/O (FT); alternate function USART1_RX. |+| 21 | PA11 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MISO, EVENTOUT, USART1_CTS, COMP1_OUT. |+| 22 | PA12 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MOSI, EVENTOUT, USART1_RTS_DE, COMP2_OUT. |+| 23 | PA13 | bidirectional | 5V-tolerant I/O (FT); alternate function SWDIO, the Serial Wire debug data pin. |+| 24 | PA14 | bidirectional | 5V-tolerant I/O (FT); alternate functions SWCLK, the Serial Wire debug clock pin, and USART2_TX. |+| 25 | PA15 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_NSS, TIM2_ETR, EVENTOUT, USART2_RX, TIM2_CH1. |+| 26 | PB3 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_SCK, TIM2_CH2, EVENTOUT; additional function COMP2_INN. |+| 27 | PB4 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MISO, EVENTOUT, TIM22_CH1; additional function COMP2_INP. |+| 28 | PB5 | bidirectional | 5V-tolerant I/O (FT); alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA, TIM22_CH2; additional function COMP2_INP. |+| 29 | PB6 | bidirectional | 5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate functions USART1_TX, I2C1_SCL, LPTIM1_ETR; additional function COMP2_INP. |+| 30 | PB7 | bidirectional | 5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate functions USART1_RX, I2C1_SDA, LPTIM1_IN2; additional functions COMP2_INP, PVD_IN. |+| 31 | BOOT0 | input | Dedicated boot mode selection pin sampled at reset (together with nBOOT1 option bit) to select booting from Flash, System memory, or embedded RAM; input voltage range 0 to 5.5 V. |+| 32 | PB8 | bidirectional | 5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate function I2C1_SCL. |+| 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: `STM32L051K6U6`+- Footprint: `Package_DFN_QFN:UFQFPN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm`+- 3D model: UFQFPN-32(5x5) (KiCad packages3D, STEP)+- 3D model files: `stm32l051k6u6-etched.step` / `stm32l051k6u6-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32l051k6u6.step` / `stm32l051k6u6.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/8590912059729534976) (131 pp, sha256 `df2ac5c4dfa917ae`, retrieved 2026-10-01, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (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/stm32l051k6u6-datasheet.pdf)
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VDD operating range is 1.65 V to 3.6 V (1.8 V min at power-on if BOR is enabled, down to 1.65 V otherwise)."+ },+ {+ "number": "2",+ "name": "PC14-OSC32_IN",+ "type": "bidirectional",+ "description": "5V-tolerant (FT) GPIO PC14 after reset, alternatively usable as OSC32_IN, the LSE 32.768 kHz oscillator input."+ },+ {+ "number": "3",+ "name": "PC15-OSC32_OUT",+ "type": "bidirectional",+ "description": "Standard 3.3V I/O (TC) GPIO PC15 after reset, alternatively usable as OSC32_OUT, the LSE 32.768 kHz oscillator output."+ },+ {+ "number": "4",+ "name": "NRST",+ "type": "bidirectional",+ "description": "Bidirectional reset pin with an embedded weak pull-up resistor; driving it low resets the device (VIL(NRST) max 0.8 V, VIH(NRST) min 1.4 V)."+ },+ {+ "number": "5",+ "name": "VDDA",+ "type": "power_in",+ "description": "Analog power supply pin (1.65 V to 3.6 V) for the ADC, comparators, RC oscillators and PLL; must be kept at the same voltage as VDD (max 300 mV difference)."+ },+ {+ "number": "6",+ "name": "PA0",+ "type": "bidirectional",+ "description": "Standard 3.3V I/O (TC), fast ADC channel; alternate functions TIM2_CH1, USART2_CTS, TIM2_ETR, COMP1_OUT; additional functions COMP1_INM6, ADC_IN0, RTC_TAMP2/WKUP1."+ },+ {+ "number": "7",+ "name": "PA1",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions EVENTOUT, TIM2_CH2, USART2_RTS_DE, TIM21_ETR; additional functions COMP1_INP, ADC_IN1."+ },+ {+ "number": "8",+ "name": "PA2",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions TIM21_CH1, TIM2_CH3, USART2_TX, COMP2_OUT; additional functions COMP2_INM6, ADC_IN2."+ },+ {+ "number": "9",+ "name": "PA3",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions TIM21_CH2, TIM2_CH4, USART2_RX; additional functions COMP2_INP, ADC_IN3."+ },+ {+ "number": "10",+ "name": "PA4",+ "type": "bidirectional",+ "description": "Standard 3.3V I/O (TC), fast ADC channel; alternate functions SPI1_NSS, USART2_CK, TIM22_ETR; additional functions COMP1_INM4, COMP2_INM4, ADC_IN4."+ },+ {+ "number": "11",+ "name": "PA5",+ "type": "bidirectional",+ "description": "Standard 3.3V I/O (TC), fast ADC channel; alternate functions SPI1_SCK, TIM2_ETR, TIM2_CH1; additional functions COMP1_INM5, COMP2_INM5, ADC_IN5."+ },+ {+ "number": "12",+ "name": "PA6",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MISO, LPUART1_CTS, TIM22_CH1, EVENTOUT, COMP1_OUT; additional function ADC_IN6."+ },+ {+ "number": "13",+ "name": "PA7",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MOSI, TIM22_CH2, EVENTOUT, COMP2_OUT; additional function ADC_IN7."+ },+ {+ "number": "14",+ "name": "PB0",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate function EVENTOUT; additional functions ADC_IN8, VREF_OUT."+ },+ {+ "number": "15",+ "name": "PB1",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate function LPUART1_RTS_DE; additional functions ADC_IN9, VREF_OUT."+ },+ {+ "number": "16",+ "name": "PB2",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate function LPTIM1_OUT."+ },+ {+ "number": "17",+ "name": "VDD",+ "type": "power_in",+ "description": "Digital power supply pin; VDD operating range is 1.65 V to 3.6 V (1.8 V min at power-on if BOR is enabled, down to 1.65 V otherwise)."+ },+ {+ "number": "18",+ "name": "PA8",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions MCO, EVENTOUT, USART1_CK."+ },+ {+ "number": "19",+ "name": "PA9",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions MCO, USART1_TX."+ },+ {+ "number": "20",+ "name": "PA10",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate function USART1_RX."+ },+ {+ "number": "21",+ "name": "PA11",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MISO, EVENTOUT, USART1_CTS, COMP1_OUT."+ },+ {+ "number": "22",+ "name": "PA12",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MOSI, EVENTOUT, USART1_RTS_DE, COMP2_OUT."+ },+ {+ "number": "23",+ "name": "PA13",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate function SWDIO, the Serial Wire debug data pin."+ },+ {+ "number": "24",+ "name": "PA14",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SWCLK, the Serial Wire debug clock pin, and USART2_TX."+ },+ {+ "number": "25",+ "name": "PA15",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_NSS, TIM2_ETR, EVENTOUT, USART2_RX, TIM2_CH1."+ },+ {+ "number": "26",+ "name": "PB3",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_SCK, TIM2_CH2, EVENTOUT; additional function COMP2_INN."+ },+ {+ "number": "27",+ "name": "PB4",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MISO, EVENTOUT, TIM22_CH1; additional function COMP2_INP."+ },+ {+ "number": "28",+ "name": "PB5",+ "type": "bidirectional",+ "description": "5V-tolerant I/O (FT); alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA, TIM22_CH2; additional function COMP2_INP."+ },+ {+ "number": "29",+ "name": "PB6",+ "type": "bidirectional",+ "description": "5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate functions USART1_TX, I2C1_SCL, LPTIM1_ETR; additional function COMP2_INP."+ },+ {+ "number": "30",+ "name": "PB7",+ "type": "bidirectional",+ "description": "5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate functions USART1_RX, I2C1_SDA, LPTIM1_IN2; additional functions COMP2_INP, PVD_IN."+ },+ {+ "number": "31",+ "name": "BOOT0",+ "type": "input",+ "description": "Dedicated boot mode selection pin sampled at reset (together with nBOOT1 option bit) to select booting from Flash, System memory, or embedded RAM; input voltage range 0 to 5.5 V."+ },+ {+ "number": "32",+ "name": "PB8",+ "type": "bidirectional",+ "description": "5V-tolerant, Fast-mode-Plus capable I/O (FTf, 20 mA drive); alternate function I2C1_SCL."+ },+ {+ "number": "33",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Pins 6 and 17 (VSS/ground) are not explicitly listed in Table 15 UFQFPN32 column, but are included b"+ ],+ "pages_sent": 131,+ "cost_usd": 0.8185,+ "at": "2026-10-01T17:32:39"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590912059729534976",+ "pages": 131,+ "sha256": "df2ac5c4dfa917ae",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 33,+ "described": 33,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}