STC32G12K128-35I-QFN32

{
  "slug": "stc32g12k128-35i-qfn32",
  "version": "0.1.0",
  "type": "component",
  "description": "STC Micro Microcontrollers (MCU/MPU/SOC), QFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stc32g12k128-35i-qfn32",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stc32g12k128-35i-qfn32.kicad_sym",
    "stc32g12k128-35i-qfn32.kicad_mod",
    "stc32g12k128-35i-qfn32.glb",
    "stc32g12k128-35i-qfn32.step",
    "stc32g12k128-35i-qfn32.lbr",
    "docs/hero.png",
    "docs/stc32g12k128-35i-qfn32-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stc32g12k128-35i-qfn32-hero.glb",
    "stc32g12k128-35i-qfn32-hero.overlay.json"
  ],
  "component": {
    "mpn": "STC32G12K128-35I-QFN32",
    "manufacturer": "STC Micro",
    "package": "QFN-32(4x4)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756362580740841472",
    "parts": {
      "symbol": "stc32g12k128-35i-qfn32.kicad_sym",
      "footprint": "stc32g12k128-35i-qfn32.kicad_mod",
      "model_3d": "stc32g12k128-35i-qfn32-hero.glb",
      "model_3d_plain": "stc32g12k128-35i-qfn32.glb",
      "model_3d_step": "stc32g12k128-35i-qfn32-etched.step",
      "model_3d_step_plain": "stc32g12k128-35i-qfn32.step",
      "lbr": "stc32g12k128-35i-qfn32.lbr"
    },
    "distributor_links": {
      "lcsc": "C5457072"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T12:47:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P1.0",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC0 analog input, PWM1P capture/output positive, and UART2 RxD; it supports quasi-bidirectional, push-pull, open-drain and high-impedance input modes and is high-impedance after power-up until its mode is set."
      },
      {
        "number": "2",
        "name": "P1.1",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC1 analog input, PWM1N complementary output and UART2 TxD; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "3",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC4 input, PWM3P output, SPI MISO/USART SPI MISO, or I2C SDA; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "4",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC5 input, PWM3N output, SPI SCLK or I2C SCL; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "5",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC6 input, UART1 RxD, PWM4P, main clock output MCLKO_2 and the external crystal output XTALO; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "6",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC7 input, UART1 TxD, PWM4N, PWM5 and the external crystal/clock input XTALI; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "7",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "Standard bidirectional GPIO that can also serve as ADC3 input, SPI MOSI, PWM2N, Timer 2 clock output T2CLKO and I2S data; it is high-impedance after power-up until its mode is set."
      },
      {
        "number": "8",
        "name": "UCap",
        "type": "passive",
        "description": "USB core power regulator pin, which the datasheet describes as the USB core supply stabilization pin (connect per the application circuit; the text gives no further electrical limit)."
      },
      {
        "number": "9",
        "name": "P5.4",
        "type": "bidirectional",
        "description": "Standard I/O by default; it can be configured as the active-low reset input nRST through ISP (requires a power cycle to take effect), and when used as a reset pin its internal 4K pull-up stays on, while as a plain I/O it stays on for about 6.5 ms after power-up."
      },
      {
        "number": "10",
        "name": "Vcc/AVcc",
        "type": "power_in",
        "description": "Main supply pin for the MCU and the ADC supply; the part operates from 1.9 V to 5.5 V (below -40 °C the supply must not be under 3.0 V)."
      },
      {
        "number": "11",
        "name": "ADC_VRef+",
        "type": "power_in",
        "description": "External ADC reference voltage input that must be connected to a reference between 2.4 V and MCU-VCC, since leaving it floating causes leakage current."
      },
      {
        "number": "12",
        "name": "Gnd/AGnd",
        "type": "power_in",
        "description": "Ground pin for digital and analog (ADC) circuits."
      },
      {
        "number": "13",
        "name": "P3.0",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that is weak-pull-up/quasi-bidirectional after power-up and also serves as USB D- data line, UART1 RxD and external interrupt INT4; during power-up P3.0 and P3.1 both low triggers USB download mode."
      },
      {
        "number": "14",
        "name": "P3.1",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that is weak-pull-up/quasi-bidirectional after power-up and also serves as USB D+ data line and UART1 TxD; it is used with P3.0 for ISP/emulation."
      },
      {
        "number": "15",
        "name": "P3.2",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as external interrupt INT0, SPI SCLK_4, I2C SCL_4 and PWM external trigger inputs PWMETI/PWMETI2; it is driven high during power-up and is the USB download-mode select pin when held low at power-up."
      },
      {
        "number": "16",
        "name": "P3.3",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as external interrupt INT1, SPI MISO_4, I2C SDA_4, PWM4N_4 and PWM7_2 output."
      },
      {
        "number": "17",
        "name": "P3.4",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as Timer 0 external clock input T0, Timer 1 clock output T1CLKO, SPI MOSI_4, PWM4P_4, PWM8_2 and comparator output CMPO."
      },
      {
        "number": "18",
        "name": "P3.5",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as Timer 1 external clock input T1, Timer 0 clock output T0CLKO, SPI SS_4 and the enhanced-PWM external fault input PWMFLT."
      },
      {
        "number": "19",
        "name": "P3.6",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as external interrupt INT2, UART1 RxD_2 and comparator negative input CMP-."
      },
      {
        "number": "20",
        "name": "P3.7",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as external interrupt INT3, UART2 TxD_2 and comparator positive input CMP+."
      },
      {
        "number": "21",
        "name": "P2.0",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A8 (external bus), PWM1P_2 and PWM5 output."
      },
      {
        "number": "22",
        "name": "P2.1",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A9 (external bus), PWM1N_2 and PWM6 output."
      },
      {
        "number": "23",
        "name": "P2.2",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A10 (external bus), PWM2P_2, PWM7, and SPI SS_2 / USART SPI slave select."
      },
      {
        "number": "24",
        "name": "P2.3",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A11 (external bus), PWM2N_2, PWM8, and SPI MOSI_2 / USART SPI MOSI."
      },
      {
        "number": "25",
        "name": "P2.4",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A12 (external bus), PWM3P_2, I2C SDA_2 and SPI MISO_2 / USART SPI MISO."
      },
      {
        "number": "26",
        "name": "P2.5",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A13 (external bus), PWM3N_2, I2C SCL_2 and SPI SCLK_2 / USART SPI clock."
      },
      {
        "number": "27",
        "name": "P2.6",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A14 (external bus) and PWM4P_2 output."
      },
      {
        "number": "28",
        "name": "P2.7",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address bus A15 (external bus) and PWM4N_2 output."
      },
      {
        "number": "29",
        "name": "P0.0",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address/data bus AD0, ADC8 input, UART3 RxD, PWM5_3, Timer 3 external clock T3_2 and CAN RX."
      },
      {
        "number": "30",
        "name": "P0.1",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address/data bus AD1, ADC9 input, UART3 TxD, PWM6_3, Timer 3 clock output T3CLKO_2 and CAN TX."
      },
      {
        "number": "31",
        "name": "P0.2",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address/data bus AD2, ADC10 input, UART4 RxD, PWM7_3, Timer 4 external clock T4_2, CAN2 RX and LIN RX."
      },
      {
        "number": "32",
        "name": "P0.3",
        "type": "bidirectional",
        "description": "Bidirectional GPIO that also serves as address/data bus AD3, ADC11 input, UART4 TxD, PWM8_3, Timer 4 clock output T4CLKO_2, CAN2 TX and LIN TX."
      },
      {
        "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-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The provided text has no separate QFN32 pin table. The QFN32 pin map is the shared 'LQFP32/QFN32' dr; Pin descriptions for P2.0-P2.7 and P0.0 are in the pin description table on datasheet pages 242-244 ; Pin 8 UCap is typed 'passive'. The datasheet's own table marks it as 'I' (USB core power regulator p",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 108,
        "cost_usd": 1.0811,
        "at": "2026-10-09T12:44:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756362580740841472",
        "pages": 1887,
        "sha256": "59bba1d366cc8d33",
        "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"
    },
    "models_3d": [
      {
        "file": "stc32g12k128-35i-qfn32.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stc32g12k128-35i-qfn32-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4bef0523300c01a2bef10e1a9087c603efdf7098255550440395bdfbc4dd0db1",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}