component
STM32C031K4U6
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.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335
{
"schema_version": 1,
"type": "component",
"slug": "stm32c031k4u6",
"title": "STM32C031K4U6",
"brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"embedded processors & controllers",
"stm32c031k4u6",
"factory-2.0.0",
"extractor-text"
],
"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"
}
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "UFQFPN-32(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"stm32c031k4u6"
],
"discovery_pitch": "STM32C031K4U6 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"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"
],
"visibility": {
"public": true
}
}