STM32F103ZET6TR

{
  "slug": "stm32f103zet6tr",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-144(20x20). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32f103zet6tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
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    "stm32f103zet6tr.kicad_mod",
    "stm32f103zet6tr.glb",
    "stm32f103zet6tr.step",
    "stm32f103zet6tr.lbr",
    "docs/hero.png",
    "docs/stm32f103zet6tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "stm32f103zet6tr-hero.overlay.json"
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  "component": {
    "mpn": "STM32F103ZET6TR",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-144(20x20)",
    "pin_count": 144,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182107576483840",
    "parts": {
      "symbol": "stm32f103zet6tr.kicad_sym",
      "footprint": "stm32f103zet6tr.kicad_mod",
      "model_3d": "stm32f103zet6tr-hero.glb",
      "model_3d_plain": "stm32f103zet6tr.glb",
      "model_3d_step": "stm32f103zet6tr-etched.step",
      "model_3d_step_plain": "stm32f103zet6tr.step",
      "lbr": "stm32f103zet6tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C14508",
      "digikey": "497-17396-2-ND",
      "mouser": "511-STM32F103ZET6TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T02:52:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-17396-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32F103ZET6TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PE2",
        "type": "bidirectional",
        "description": "Port E bit 2, general-purpose I/O, 5V tolerant, alternate functions include ETM trace clock and FSMC address line A23."
      },
      {
        "number": "2",
        "name": "PE3",
        "type": "bidirectional",
        "description": "Port E bit 3, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 0 and FSMC address line A19."
      },
      {
        "number": "3",
        "name": "PE4",
        "type": "bidirectional",
        "description": "Port E bit 4, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 1 and FSMC address line A20."
      },
      {
        "number": "4",
        "name": "PE5",
        "type": "bidirectional",
        "description": "Port E bit 5, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 2 and FSMC address line A21."
      },
      {
        "number": "5",
        "name": "PE6",
        "type": "bidirectional",
        "description": "Port E bit 6, general-purpose I/O, 5V tolerant, alternate functions include ETM trace data 3 and FSMC address line A22."
      },
      {
        "number": "6",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup power supply pin for RTC and backup registers, accepts 2.0 to 3.6 V."
      },
      {
        "number": "7",
        "name": "PC13-TAMPER-RTC",
        "type": "bidirectional",
        "description": "Port C bit 13, backup domain I/O, alternate function TAMPER-RTC, limited to 2 MHz output speed with 30 pF load maximum."
      },
      {
        "number": "8",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "Port C bit 14, backup domain I/O, alternate function OSC32_IN for 32 kHz crystal oscillator input."
      },
      {
        "number": "9",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "Port C bit 15, backup domain I/O, alternate function OSC32_OUT for 32 kHz crystal oscillator output."
      },
      {
        "number": "10",
        "name": "PF0",
        "type": "bidirectional",
        "description": "Port F bit 0, general-purpose I/O, 5V tolerant, alternate function FSMC_A0 for address line 0."
      },
      {
        "number": "11",
        "name": "PF1",
        "type": "bidirectional",
        "description": "Port F bit 1, general-purpose I/O, 5V tolerant, alternate function FSMC_A1 for address line 1."
      },
      {
        "number": "12",
        "name": "PF2",
        "type": "bidirectional",
        "description": "Port F bit 2, general-purpose I/O, 5V tolerant, alternate function FSMC_A2 for address line 2."
      },
      {
        "number": "13",
        "name": "PF3",
        "type": "bidirectional",
        "description": "Port F bit 3, general-purpose I/O, 5V tolerant, alternate function FSMC_A3 for address line 3."
      },
      {
        "number": "14",
        "name": "PF4",
        "type": "bidirectional",
        "description": "Port F bit 4, general-purpose I/O, 5V tolerant, alternate function FSMC_A4 for address line 4."
      },
      {
        "number": "15",
        "name": "PF5",
        "type": "bidirectional",
        "description": "Port F bit 5, general-purpose I/O, 5V tolerant, alternate function FSMC_A5 for address line 5."
      },
      {
        "number": "16",
        "name": "VSS_5",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "17",
        "name": "VDD_5",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "18",
        "name": "PF6",
        "type": "bidirectional",
        "description": "Port F bit 6, general-purpose I/O, alternate functions include ADC3_IN4 analog input and FSMC_NIORD control signal."
      },
      {
        "number": "19",
        "name": "PF7",
        "type": "bidirectional",
        "description": "Port F bit 7, general-purpose I/O, alternate functions include ADC3_IN5 analog input and FSMC_NREG control signal."
      },
      {
        "number": "20",
        "name": "PF8",
        "type": "bidirectional",
        "description": "Port F bit 8, general-purpose I/O, alternate functions include ADC3_IN6 analog input and FSMC_NIOWR control signal."
      },
      {
        "number": "21",
        "name": "PF9",
        "type": "bidirectional",
        "description": "Port F bit 9, general-purpose I/O, alternate functions include ADC3_IN7 analog input and FSMC_CD control signal."
      },
      {
        "number": "22",
        "name": "PF10",
        "type": "bidirectional",
        "description": "Port F bit 10, general-purpose I/O, alternate functions include ADC3_IN8 analog input and FSMC_INTR control signal."
      },
      {
        "number": "23",
        "name": "OSC_IN",
        "type": "input",
        "description": "High-speed external oscillator input, accepts 4 to 16 MHz crystal oscillator signal."
      },
      {
        "number": "24",
        "name": "OSC_OUT",
        "type": "output",
        "description": "High-speed external oscillator output, drives 4 to 16 MHz crystal oscillator load."
      },
      {
        "number": "25",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Reset pin, active low input for system reset or open-drain output for reset signaling."
      },
      {
        "number": "26",
        "name": "PC0",
        "type": "bidirectional",
        "description": "Port C bit 0, general-purpose I/O, alternate function ADC123_IN10 for analog-to-digital converter input."
      },
      {
        "number": "27",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Port C bit 1, general-purpose I/O, alternate function ADC123_IN11 for analog-to-digital converter input."
      },
      {
        "number": "28",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2, general-purpose I/O, alternate function ADC123_IN12 for analog-to-digital converter input."
      },
      {
        "number": "29",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Port C bit 3, general-purpose I/O, alternate function ADC123_IN13 for analog-to-digital converter input."
      },
      {
        "number": "30",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground reference pin, connect to system ground for ADC and DAC operation."
      },
      {
        "number": "31",
        "name": "VREF-",
        "type": "power_in",
        "description": "ADC negative reference voltage pin, typically connected to VSSA or ground, range 0 V."
      },
      {
        "number": "32",
        "name": "VREF+",
        "type": "power_in",
        "description": "ADC positive reference voltage pin, accepts 2.4 to 3.6 V, can be internally connected to VDDA."
      },
      {
        "number": "33",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply pin, accepts 2.4 to 3.6 V for ADC, DAC, and comparator operation."
      },
      {
        "number": "34",
        "name": "PA0-WKUP",
        "type": "bidirectional",
        "description": "Port A bit 0, general-purpose I/O with wakeup capability, alternate functions include USART2_CTS, ADC123_IN0, and TIM2/TIM5/TIM8 timer inputs."
      },
      {
        "number": "35",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1, general-purpose I/O, alternate functions include USART2_RTS, ADC123_IN1, and TIM2/TIM5 timer inputs."
      },
      {
        "number": "36",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2, general-purpose I/O, alternate functions include USART2_TX, ADC123_IN2, and TIM2/TIM5 timer inputs."
      },
      {
        "number": "37",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3, general-purpose I/O, alternate functions include USART2_RX, ADC123_IN3, and TIM2/TIM5 timer inputs."
      },
      {
        "number": "38",
        "name": "VSS_4",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "39",
        "name": "VDD_4",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "40",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4, general-purpose I/O, alternate functions include SPI1_NSS, USART2_CK, DAC_OUT1, and ADC12_IN4 analog input."
      },
      {
        "number": "41",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5, general-purpose I/O, alternate functions include SPI1_SCK, DAC_OUT2, and ADC12_IN5 analog input."
      },
      {
        "number": "42",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6, general-purpose I/O, alternate functions include SPI1_MISO, TIM8_BKIN, ADC12_IN6, and TIM1/TIM3 timer functions."
      },
      {
        "number": "43",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7, general-purpose I/O, alternate functions include SPI1_MOSI, TIM8_CH1N, ADC12_IN7, and TIM1/TIM3 timer functions."
      },
      {
        "number": "44",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4, general-purpose I/O, alternate function ADC12_IN14 for analog-to-digital converter input."
      },
      {
        "number": "45",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5, general-purpose I/O, alternate function ADC12_IN15 for analog-to-digital converter input."
      },
      {
        "number": "46",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0, general-purpose I/O, alternate functions include ADC12_IN8 and TIM1/TIM3/TIM8 timer functions."
      },
      {
        "number": "47",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1, general-purpose I/O, alternate functions include ADC12_IN9 and TIM1/TIM3/TIM8 timer functions."
      },
      {
        "number": "48",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2, 5V tolerant general-purpose I/O, alternate function BOOT1 for boot mode selection."
      },
      {
        "number": "49",
        "name": "PF11",
        "type": "bidirectional",
        "description": "Port F bit 11, 5V tolerant general-purpose I/O, alternate function FSMC_NIOS16 for memory control signal."
      },
      {
        "number": "50",
        "name": "PF12",
        "type": "bidirectional",
        "description": "Port F bit 12, 5V tolerant general-purpose I/O, alternate function FSMC_A6 for address line 6."
      },
      {
        "number": "51",
        "name": "VSS_6",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "52",
        "name": "VDD_6",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "53",
        "name": "PF13",
        "type": "bidirectional",
        "description": "Port F bit 13, 5V tolerant general-purpose I/O, alternate function FSMC_A7 for address line 7."
      },
      {
        "number": "54",
        "name": "PF14",
        "type": "bidirectional",
        "description": "Port F bit 14, 5V tolerant general-purpose I/O, alternate function FSMC_A8 for address line 8."
      },
      {
        "number": "55",
        "name": "PF15",
        "type": "bidirectional",
        "description": "Port F bit 15, 5V tolerant general-purpose I/O, alternate function FSMC_A9 for address line 9."
      },
      {
        "number": "56",
        "name": "PG0",
        "type": "bidirectional",
        "description": "Port G bit 0, 5V tolerant general-purpose I/O, alternate function FSMC_A10 for address line 10."
      },
      {
        "number": "57",
        "name": "PG1",
        "type": "bidirectional",
        "description": "Port G bit 1, 5V tolerant general-purpose I/O, alternate function FSMC_A11 for address line 11."
      },
      {
        "number": "58",
        "name": "PE7",
        "type": "bidirectional",
        "description": "Port E bit 7, 5V tolerant general-purpose I/O, alternate functions include FSMC_D4 data line and TIM1_ETR timer input."
      },
      {
        "number": "59",
        "name": "PE8",
        "type": "bidirectional",
        "description": "Port E bit 8, 5V tolerant general-purpose I/O, alternate functions include FSMC_D5 data line and TIM1_CH1N timer output."
      },
      {
        "number": "60",
        "name": "PE9",
        "type": "bidirectional",
        "description": "Port E bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_D6 data line and TIM1_CH1 timer output."
      },
      {
        "number": "61",
        "name": "VSS_7",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "62",
        "name": "VDD_7",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "63",
        "name": "PE10",
        "type": "bidirectional",
        "description": "Port E bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_D7 data line and TIM1_CH2N timer output."
      },
      {
        "number": "64",
        "name": "PE11",
        "type": "bidirectional",
        "description": "Port E bit 11, 5V tolerant general-purpose I/O, alternate functions include FSMC_D8 data line and TIM1_CH2 timer output."
      },
      {
        "number": "65",
        "name": "PE12",
        "type": "bidirectional",
        "description": "Port E bit 12, 5V tolerant general-purpose I/O, alternate functions include FSMC_D9 data line and TIM1_CH3N timer output."
      },
      {
        "number": "66",
        "name": "PE13",
        "type": "bidirectional",
        "description": "Port E bit 13, 5V tolerant general-purpose I/O, alternate functions include FSMC_D10 data line and TIM1_CH3 timer output."
      },
      {
        "number": "67",
        "name": "PE14",
        "type": "bidirectional",
        "description": "Port E bit 14, 5V tolerant general-purpose I/O, alternate functions include FSMC_D11 data line and TIM1_CH4 timer output."
      },
      {
        "number": "68",
        "name": "PE15",
        "type": "bidirectional",
        "description": "Port E bit 15, 5V tolerant general-purpose I/O, alternate functions include FSMC_D12 data line and TIM1_BKIN brake input."
      },
      {
        "number": "69",
        "name": "PB10",
        "type": "bidirectional",
        "description": "Port B bit 10, 5V tolerant general-purpose I/O, alternate functions include I2C2_SCL, USART3_TX, and TIM2_CH3 timer output."
      },
      {
        "number": "70",
        "name": "PB11",
        "type": "bidirectional",
        "description": "Port B bit 11, 5V tolerant general-purpose I/O, alternate functions include I2C2_SDA, USART3_RX, and TIM2_CH4 timer output."
      },
      {
        "number": "71",
        "name": "VSS_1",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "72",
        "name": "VDD_1",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "73",
        "name": "PB12",
        "type": "bidirectional",
        "description": "Port B bit 12, 5V tolerant general-purpose I/O, alternate functions include SPI2_NSS, I2S2_WS, I2C2_SMBA, USART3_CK, and TIM1_BKIN."
      },
      {
        "number": "74",
        "name": "PB13",
        "type": "bidirectional",
        "description": "Port B bit 13, 5V tolerant general-purpose I/O, alternate functions include SPI2_SCK, I2S2_CK, USART3_CTS, and TIM1_CH1N."
      },
      {
        "number": "75",
        "name": "PB14",
        "type": "bidirectional",
        "description": "Port B bit 14, 5V tolerant general-purpose I/O, alternate functions include SPI2_MISO, TIM1_CH2N, and USART3_RTS."
      },
      {
        "number": "76",
        "name": "PB15",
        "type": "bidirectional",
        "description": "Port B bit 15, 5V tolerant general-purpose I/O, alternate functions include SPI2_MOSI, I2S2_SD, and TIM1_CH3N."
      },
      {
        "number": "77",
        "name": "PD8",
        "type": "bidirectional",
        "description": "Port D bit 8, 5V tolerant general-purpose I/O, alternate functions include FSMC_D13 data line and USART3_TX."
      },
      {
        "number": "78",
        "name": "PD9",
        "type": "bidirectional",
        "description": "Port D bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_D14 data line and USART3_RX."
      },
      {
        "number": "79",
        "name": "PD10",
        "type": "bidirectional",
        "description": "Port D bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_D15 data line and USART3_CK."
      },
      {
        "number": "80",
        "name": "PD11",
        "type": "bidirectional",
        "description": "Port D bit 11, 5V tolerant general-purpose I/O, alternate functions include FSMC_A16 address line and USART3_CTS."
      },
      {
        "number": "81",
        "name": "PD12",
        "type": "bidirectional",
        "description": "Port D bit 12, 5V tolerant general-purpose I/O, alternate functions include FSMC_A17 address line, TIM4_CH1 timer, and USART3_RTS."
      },
      {
        "number": "82",
        "name": "PD13",
        "type": "bidirectional",
        "description": "Port D bit 13, 5V tolerant general-purpose I/O, alternate functions include FSMC_A18 address line and TIM4_CH2 timer."
      },
      {
        "number": "83",
        "name": "VSS_8",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "84",
        "name": "VDD_8",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "85",
        "name": "PD14",
        "type": "bidirectional",
        "description": "Port D bit 14, 5V tolerant general-purpose I/O, alternate functions include FSMC_D0 data line and TIM4_CH3 timer output."
      },
      {
        "number": "86",
        "name": "PD15",
        "type": "bidirectional",
        "description": "Port D bit 15, 5V tolerant general-purpose I/O, alternate functions include FSMC_D1 data line and TIM4_CH4 timer output."
      },
      {
        "number": "87",
        "name": "PG2",
        "type": "bidirectional",
        "description": "Port G bit 2, 5V tolerant general-purpose I/O, alternate function FSMC_A12 for address line 12."
      },
      {
        "number": "88",
        "name": "PG3",
        "type": "bidirectional",
        "description": "Port G bit 3, 5V tolerant general-purpose I/O, alternate function FSMC_A13 for address line 13."
      },
      {
        "number": "89",
        "name": "PG4",
        "type": "bidirectional",
        "description": "Port G bit 4, 5V tolerant general-purpose I/O, alternate function FSMC_A14 for address line 14."
      },
      {
        "number": "90",
        "name": "PG5",
        "type": "bidirectional",
        "description": "Port G bit 5, 5V tolerant general-purpose I/O, alternate function FSMC_A15 for address line 15."
      },
      {
        "number": "91",
        "name": "PG6",
        "type": "bidirectional",
        "description": "Port G bit 6, 5V tolerant general-purpose I/O, alternate function FSMC_INT2 for interrupt signal."
      },
      {
        "number": "92",
        "name": "PG7",
        "type": "bidirectional",
        "description": "Port G bit 7, 5V tolerant general-purpose I/O, alternate function FSMC_INT3 for interrupt signal."
      },
      {
        "number": "93",
        "name": "PG8",
        "type": "bidirectional",
        "description": "Port G bit 8, 5V tolerant general-purpose I/O."
      },
      {
        "number": "94",
        "name": "VSS_9",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "95",
        "name": "VDD_9",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "96",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6, 5V tolerant general-purpose I/O, alternate functions include I2S2_MCK, TIM8_CH1, SDIO_D6, and TIM3_CH1."
      },
      {
        "number": "97",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7, 5V tolerant general-purpose I/O, alternate functions include I2S3_MCK, TIM8_CH2, SDIO_D7, and TIM3_CH2."
      },
      {
        "number": "98",
        "name": "PC8",
        "type": "bidirectional",
        "description": "Port C bit 8, 5V tolerant general-purpose I/O, alternate functions include TIM8_CH3, SDIO_D0, and TIM3_CH3."
      },
      {
        "number": "99",
        "name": "PC9",
        "type": "bidirectional",
        "description": "Port C bit 9, 5V tolerant general-purpose I/O, alternate functions include TIM8_CH4, SDIO_D1, and TIM3_CH4."
      },
      {
        "number": "100",
        "name": "PA8",
        "type": "bidirectional",
        "description": "Port A bit 8, 5V tolerant general-purpose I/O, alternate functions include USART1_CK, TIM1_CH1, and MCO master clock output."
      },
      {
        "number": "101",
        "name": "PA9",
        "type": "bidirectional",
        "description": "Port A bit 9, 5V tolerant general-purpose I/O, alternate functions include USART1_TX and TIM1_CH2 timer output."
      },
      {
        "number": "102",
        "name": "PA10",
        "type": "bidirectional",
        "description": "Port A bit 10, 5V tolerant general-purpose I/O, alternate functions include USART1_RX and TIM1_CH3 timer output."
      },
      {
        "number": "103",
        "name": "PA11",
        "type": "bidirectional",
        "description": "Port A bit 11, 5V tolerant general-purpose I/O, alternate functions include USART1_CTS, USB D- line, CAN_RX, and TIM1_CH4."
      },
      {
        "number": "104",
        "name": "PA12",
        "type": "bidirectional",
        "description": "Port A bit 12, 5V tolerant general-purpose I/O, alternate functions include USART1_RTS, USB D+ line, CAN_TX, and TIM1_ETR."
      },
      {
        "number": "105",
        "name": "PA13",
        "type": "bidirectional",
        "description": "Port A bit 13, 5V tolerant general-purpose I/O, alternate function JTMS-SWDIO for JTAG and SWD debug interface."
      },
      {
        "number": "106",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected, no internal connection to chip."
      },
      {
        "number": "107",
        "name": "VSS_2",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "108",
        "name": "VDD_2",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "109",
        "name": "PA14",
        "type": "bidirectional",
        "description": "Port A bit 14, 5V tolerant general-purpose I/O, alternate function JTCK-SWCLK for JTAG and SWD debug interface."
      },
      {
        "number": "110",
        "name": "PA15",
        "type": "bidirectional",
        "description": "Port A bit 15, 5V tolerant general-purpose I/O, alternate functions include JTDI, SPI3_NSS, I2S3_WS, TIM2_CH1_ETR, and SPI1_NSS."
      },
      {
        "number": "111",
        "name": "PC10",
        "type": "bidirectional",
        "description": "Port C bit 10, 5V tolerant general-purpose I/O, alternate functions include UART4_TX, SDIO_D2, and USART3_TX."
      },
      {
        "number": "112",
        "name": "PC11",
        "type": "bidirectional",
        "description": "Port C bit 11, 5V tolerant general-purpose I/O, alternate functions include UART4_RX, SDIO_D3, and USART3_RX."
      },
      {
        "number": "113",
        "name": "PC12",
        "type": "bidirectional",
        "description": "Port C bit 12, 5V tolerant general-purpose I/O, alternate functions include UART5_TX, SDIO_CK, and USART3_CK."
      },
      {
        "number": "114",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0, 5V tolerant general-purpose I/O, alternate functions include OSC_IN oscillator input, FSMC_D2 data line, and CAN_RX."
      },
      {
        "number": "115",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1, 5V tolerant general-purpose I/O, alternate functions include OSC_OUT oscillator output, FSMC_D3 data line, and CAN_TX."
      },
      {
        "number": "116",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2, 5V tolerant general-purpose I/O, alternate functions include TIM3_ETR, UART5_RX, and SDIO_CMD."
      },
      {
        "number": "117",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3, 5V tolerant general-purpose I/O, alternate functions include FSMC_CLK memory clock and USART2_CTS."
      },
      {
        "number": "118",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4, 5V tolerant general-purpose I/O, alternate functions include FSMC_NOE output enable and USART2_RTS."
      },
      {
        "number": "119",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5, 5V tolerant general-purpose I/O, alternate functions include FSMC_NWE write enable and USART2_TX."
      },
      {
        "number": "120",
        "name": "VSS_10",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "121",
        "name": "VDD_10",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "122",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6, 5V tolerant general-purpose I/O, alternate functions include FSMC_NWAIT wait signal and USART2_RX."
      },
      {
        "number": "123",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7, 5V tolerant general-purpose I/O, alternate functions include FSMC_NE1 chip select and USART2_CK."
      },
      {
        "number": "124",
        "name": "PG9",
        "type": "bidirectional",
        "description": "Port G bit 9, 5V tolerant general-purpose I/O, alternate functions include FSMC_NE2 chip select and FSMC_NCE3."
      },
      {
        "number": "125",
        "name": "PG10",
        "type": "bidirectional",
        "description": "Port G bit 10, 5V tolerant general-purpose I/O, alternate functions include FSMC_NCE4_1 and FSMC_NE3 chip selects."
      },
      {
        "number": "126",
        "name": "PG11",
        "type": "bidirectional",
        "description": "Port G bit 11, 5V tolerant general-purpose I/O, alternate function FSMC_NCE4_2 for chip select."
      },
      {
        "number": "127",
        "name": "PG12",
        "type": "bidirectional",
        "description": "Port G bit 12, 5V tolerant general-purpose I/O, alternate function FSMC_NE4 for chip select."
      },
      {
        "number": "128",
        "name": "PG13",
        "type": "bidirectional",
        "description": "Port G bit 13, 5V tolerant general-purpose I/O, alternate function FSMC_A24 for address line 24."
      },
      {
        "number": "129",
        "name": "PG14",
        "type": "bidirectional",
        "description": "Port G bit 14, 5V tolerant general-purpose I/O, alternate function FSMC_A25 for address line 25."
      },
      {
        "number": "130",
        "name": "VSS_11",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "131",
        "name": "VDD_11",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      },
      {
        "number": "132",
        "name": "PG15",
        "type": "bidirectional",
        "description": "Port G bit 15, 5V tolerant general-purpose I/O."
      },
      {
        "number": "133",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3, 5V tolerant general-purpose I/O, alternate functions include JTDO, SPI3_SCK, I2S3_CK, TRACESWO, TIM2_CH2, and SPI1_SCK."
      },
      {
        "number": "134",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4, 5V tolerant general-purpose I/O, alternate functions include NJTRST, SPI3_MISO, TIM3_CH1, and SPI1_MISO."
      },
      {
        "number": "135",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5, general-purpose I/O, alternate functions include I2C1_SMBA, SPI3_MOSI, I2S3_SD, TIM3_CH2, and SPI1_MOSI."
      },
      {
        "number": "136",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6, 5V tolerant general-purpose I/O, alternate functions include I2C1_SCL, TIM4_CH1, and USART1_TX."
      },
      {
        "number": "137",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7, 5V tolerant general-purpose I/O, alternate functions include I2C1_SDA, FSMC_NADV address valid, TIM4_CH2, and USART1_RX."
      },
      {
        "number": "138",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot mode selection pin, determines whether device boots from flash memory or system bootloader."
      },
      {
        "number": "139",
        "name": "PB8",
        "type": "bidirectional",
        "description": "Port B bit 8, 5V tolerant general-purpose I/O, alternate functions include TIM4_CH3, SDIO_D4, I2C1_SCL, and CAN_RX."
      },
      {
        "number": "140",
        "name": "PB9",
        "type": "bidirectional",
        "description": "Port B bit 9, 5V tolerant general-purpose I/O, alternate functions include TIM4_CH4, SDIO_D5, I2C1_SDA, and CAN_TX."
      },
      {
        "number": "141",
        "name": "PE0",
        "type": "bidirectional",
        "description": "Port E bit 0, 5V tolerant general-purpose I/O, alternate functions include TIM4_ETR and FSMC_NBL0 byte lane select."
      },
      {
        "number": "142",
        "name": "PE1",
        "type": "bidirectional",
        "description": "Port E bit 1, 5V tolerant general-purpose I/O, alternate function FSMC_NBL1 for byte lane select."
      },
      {
        "number": "143",
        "name": "VSS_3",
        "type": "power_in",
        "description": "Ground supply pin, connect to system ground (0 V)."
      },
      {
        "number": "144",
        "name": "VDD_3",
        "type": "power_in",
        "description": "Main power supply pin, accepts 2.0 to 3.6 V."
      }
    ],
    "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 7 (PC13), Pin 8 (PC14), Pin 9 (PC15): These pins are in the backup power domain with limited cur; Pin 23 (OSC_IN) and Pin 24 (OSC_OUT): Designed for 4-16 MHz crystal oscillator. Actual crystal param; Pin 114 (PD0) and Pin 115 (PD1): These pins can be configured as OSC_IN/OSC_OUT (PLL input) after re"
        ],
        "pages_sent": 44,
        "cost_usd": 0.5198,
        "at": "2026-10-07T02:52:00"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182107576483840",
        "pages": 130,
        "sha256": "6cc345d224870bff",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 144,
        "described": 144,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32f103zet6tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b4d698da8bb7697b754adb5655c932342462d9b9341cdaa081b3604dbdf7559b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32f103zet6tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "8d872eb43f78805ae42faf47f885c27d46ab3853431320244ae0616a0cb67079",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}