STM32C031K4U6

{
  "slug": "stm32c031k4u6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32c031k4u6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32c031k4u6.kicad_sym",
    "stm32c031k4u6.kicad_mod",
    "stm32c031k4u6.glb",
    "stm32c031k4u6.step",
    "stm32c031k4u6.lbr",
    "docs/hero.png",
    "docs/stm32c031k4u6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32c031k4u6-hero.glb",
    "stm32c031k4u6-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32C031K4U6",
    "manufacturer": "STMicroelectronics",
    "package": "UFQFPN-32(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603002641173790720",
    "parts": {
      "symbol": "stm32c031k4u6.kicad_sym",
      "footprint": "stm32c031k4u6.kicad_mod",
      "model_3d": "stm32c031k4u6-hero.glb",
      "model_3d_plain": "stm32c031k4u6.glb",
      "model_3d_step": "stm32c031k4u6-etched.step",
      "model_3d_step_plain": "stm32c031k4u6.step",
      "lbr": "stm32c031k4u6.lbr"
    },
    "distributor_links": {
      "lcsc": 5456141,
      "digikey": "497-STM32C031K4U6-ND",
      "mouser": "511-STM32C031K4U6"
    },
    "distributor_check": {
      "checked_at": "2026-10-03T05:40:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32C031K4U6-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32C031K4U6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions IR_OUT, USART2_RTS_DE_CK, TIM17_CH1, TIM3_CH2, I2C1_SDA, EVENTOUT."
      },
      {
        "number": "2",
        "name": "PC14-OSCX_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (PC14 at reset) with OSCX_IN oscillator input additional function and AFs USART1_TX, TIM1_ETR, TIM1_BKIN2, IR_OUT, USART2_RTS_DE_CK, TIM17_CH1, TIM3_CH2, I2C1_SDA, EVENTOUT."
      },
      {
        "number": "3",
        "name": "PC15-OSCX_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (PC15 at reset) with OSCX_OUT oscillator output additional function and AFs OSC32_EN, OSC_EN, TIM1_ETR, TIM3_CH3."
      },
      {
        "number": "4",
        "name": "VDD/VDDA",
        "type": "power_in",
        "description": "Digital and analog supply pin; operating range 2.0 V to 3.6 V, to be decoupled with 100 nF plus 4.7 µF ceramic capacitors close to the pin."
      },
      {
        "number": "5",
        "name": "VSS/VSSA",
        "type": "power_in",
        "description": "Digital and analog ground pin."
      },
      {
        "number": "6",
        "name": "PF2-NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up (FT); alternate functions MCO, TIM1_CH4; additional function NRST."
      },
      {
        "number": "7",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART2_CTS, TIM16_CH1, USART1_TX, TIM1_CH1; additional functions ADC_IN0, WKUP1."
      },
      {
        "number": "8",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_SCK/I2S1_CK, USART2_RTS_DE_CK, TIM17_CH1, USART1_RX, TIM1_CH2, I2C1_SMBA, EVENTOUT; additional function ADC_IN1."
      },
      {
        "number": "9",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MOSI/I2S1_SD, USART2_TX, TIM16_CH1N, TIM3_ETR, TIM1_CH3; additional functions ADC_IN2, WKUP4, LSCO."
      },
      {
        "number": "10",
        "name": "PA3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART2_RX, TIM1_CH1N, TIM1_CH4, EVENTOUT; additional function ADC_IN3."
      },
      {
        "number": "11",
        "name": "PA4",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_NSS/I2S1_WS, USART2_TX, TIM1_CH2N, TIM14_CH1, TIM17_CH1N, EVENTOUT; additional functions ADC_IN4, RTC_TS, RTC_OUT1, WKUP2."
      },
      {
        "number": "12",
        "name": "PA5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_SCK/I2S1_CK, USART2_RX, TIM1_CH3N, TIM1_CH1, EVENTOUT; additional function ADC_IN5."
      },
      {
        "number": "13",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, TIM16_CH1; additional function ADC_IN6."
      },
      {
        "number": "14",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM1_CH1N, TIM14_CH1, TIM17_CH1; additional function ADC_IN7."
      },
      {
        "number": "15",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_NSS/I2S1_WS, TIM3_CH3, TIM1_CH2N; additional function ADC_IN17."
      },
      {
        "number": "16",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs TIM14_CH1, TIM3_CH4, TIM1_CH3N, TIM1_CH2N, EVENTOUT; additional function ADC_IN18."
      },
      {
        "number": "17",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART1_RX, MCO2, EVENTOUT; additional function ADC_IN19."
      },
      {
        "number": "18",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs MCO, USART2_TX, TIM1_CH1, EVENTOUT, SPI1_NSS/I2S1_WS, TIM1_CH2N, TIM1_CH3N, TIM3_CH3, TIM3_CH4, TIM14_CH1, USART1_RX, MCO2; additional function ADC_IN8."
      },
      {
        "number": "19",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs MCO, USART1_TX, TIM1_CH2, TIM3_ETR, I2C1_SCL, EVENTOUT; can be remapped in place of PA11 via SYSCFG_CFGR1."
      },
      {
        "number": "20",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with alternate function TIM3_CH1."
      },
      {
        "number": "21",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART1_RX, TIM1_CH3, MCO2, TIM17_BKIN, I2C1_SDA, EVENTOUT; can be remapped in place of PA12 via SYSCFG_CFGR1."
      },
      {
        "number": "22",
        "name": "PA11 [PA9]",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MISO/I2S1_MCK, USART1_CTS, TIM1_CH4, TIM1_BKIN2; additional function ADC_IN11; PA9 can be remapped onto this pin via SYSCFG_CFGR1."
      },
      {
        "number": "23",
        "name": "PA12 [PA10]",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MOSI/I2S1_SD, USART1_RTS_DE_CK, TIM1_ETR, I2S_CKIN; additional function ADC_IN12; PA10 can be remapped onto this pin via SYSCFG_CFGR1."
      },
      {
        "number": "24",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O, SWDIO at reset with internal pull-up active; AFs IR_OUT, TIM3_ETR, USART2_RX, EVENTOUT; additional function ADC_IN13."
      },
      {
        "number": "25",
        "name": "PA14-BOOT0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O, SWCLK at reset with internal pull-down active; AFs USART2_TX, EVENTOUT, SPI1_NSS/I2S1_WS, USART2_RX, TIM1_CH1, MCO2, USART1_RTS_DE_CK; additional functions ADC_IN14, BOOT0."
      },
      {
        "number": "26",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_NSS/I2S1_WS, USART2_RX, TIM1_CH1, MCO2, USART1_RTS_DE_CK, EVENTOUT."
      },
      {
        "number": "27",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_SCK/I2S1_CK, TIM1_CH2, TIM3_CH2, USART1_RTS_DE_CK, EVENTOUT."
      },
      {
        "number": "28",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MISO/I2S1_MCK, TIM3_CH1, USART1_CTS, TIM17_BKIN, EVENTOUT."
      },
      {
        "number": "29",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM16_BKIN, TIM3_CH3, I2C1_SMBA; additional function WKUP6."
      },
      {
        "number": "30",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART1_TX, TIM1_CH3, TIM16_CH1N, TIM3_CH3, USART1_RTS_DE_CK, USART1_CTS, I2C1_SCL, I2C1_SMBA, SPI1 signals, TIM1_CH2, TIM3_CH1/CH2, TIM16_BKIN, TIM17_BKIN; additional function WKUP3."
      },
      {
        "number": "31",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART1_RX, TIM1_CH4, TIM17_CH1N, TIM3_CH4, I2C1_SDA, EVENTOUT, USART2_CTS, TIM16_CH1, TIM3_CH1, I2C1_SCL; additional function RTC_REFIN."
      },
      {
        "number": "32",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with AFs USART2_CTS, TIM16_CH1, TIM3_CH1, I2C1_SCL, EVENTOUT."
      },
      {
        "number": "33",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "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: Pin numbering discrepancy between Figure 6 (STM32C031KxU UFQFPN32 pinout diagram) and Table 12 (Pin ; Exposed pad (VSS) shown in figure was not assigned a specific pin number in the diagram; typically n",
          "exposed pad 33 added from the footprint",
          "1/33 pins cited to the wrong page (name found elsewhere): ['9:PB9@p35']"
        ],
        "pages_sent": 50,
        "cost_usd": 0.4,
        "at": "2026-10-03T05:39:49"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603002641173790720",
        "pages": 108,
        "sha256": "c0de50247b672919",
        "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"
    }
  }
}