STC15H2K64S4-36I-SOP28

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  "type": "component",
  "slug": "stc15h2k64s4-36i-sop28",
  "title": "STC15H2K64S4-36I-SOP28",
  "brief": "STC Micro Microcontrollers (MCU/MPU/SOC), SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "embedded processors & controllers",
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    "extractor-text"
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  "component": {
    "mpn": "STC15H2K64S4-36I-SOP28",
    "manufacturer": "STC Micro",
    "package": "SOP-28",
    "pin_count": 28,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603394997840998400",
    "parts": {
      "symbol": "stc15h2k64s4-36i-sop28.kicad_sym",
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      "lbr": "stc15h2k64s4-36i-sop28.lbr"
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    "distributor_links": {
      "lcsc": "C22472739"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T08:50:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P2.6/PWM26/A14/CCP1_3",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.6 (alternates PWM26, CCP1_3, A14) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "2",
        "name": "P2.7/PWM27/A15/CCP2_3",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.7 (alternates PWM27, CCP2_3, A15) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "3",
        "name": "P1.0",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.0 (alternates UART2 RxD2, CCP1, ADC channel 0, PWM10) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "4",
        "name": "P1.1",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.1 (alternates UART2 TxD2, CCP0, ADC channel 1, PWM11) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "5",
        "name": "P1.2",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.2 (alternates Timer 2 external count input T2, SPI SS, ECI, ADC channel 2, PWM12) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "6",
        "name": "P1.3",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.3 (alternates T2CLKO, SPI MOSI, ADC channel 3, PWM13) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "7",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.4 (alternates I2C SDA, SPI MISO, ADC channel 4, PWM14) that powers up as a high-impedance input and can also wake the MCU from power-down via I2C SDA falling edge."
      },
      {
        "number": "8",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.5 (alternates I2C SCL, SPI SCLK, ADC channel 5, PWM15) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "9",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.6 that serves as XTALO crystal output when a crystal is used, and is fixed as a high-impedance input when external clock mode (XITYPE=0) is selected."
      },
      {
        "number": "10",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "General-purpose I/O P1.7 that serves as XTALI crystal or external clock input when the external oscillator is enabled, and otherwise is available as ADC channel 7 or PWM17."
      },
      {
        "number": "11",
        "name": "P5.4",
        "type": "bidirectional",
        "description": "P5.4 is a general-purpose I/O by default and becomes an active-low reset input (nRST) when the RST pin function is selected in RSTCFG; in reset mode its internal 4K pull-up stays enabled, while as I/O its pull-up is on for about 6.5 ms after power-up."
      },
      {
        "number": "12",
        "name": "Vcc/AVcc/ADC_VRef+",
        "type": "power_in",
        "description": "Main MCU supply (Vcc, also AVcc and ADC_VRef+); the datasheet gives an operating range of 1.9 V to 5.5 V, and ADC_VRef+ must be tied to an external reference of 2.4 V to MCU-VCC or directly to VCC, never left floating."
      },
      {
        "number": "13",
        "name": "P5.2",
        "type": "bidirectional",
        "description": "General-purpose I/O P5.2 (alternates UART4 RxD4_2 and PWM52) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "14",
        "name": "Gnd/AGnd",
        "type": "power_in",
        "description": "Ground reference for the digital core and analog ground (AGnd); the datasheet requires the ADC analog ground to be connected to system ground with a short, thick trace."
      },
      {
        "number": "15",
        "name": "P3.0/PWM30/RxD/INT4",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.0 (alternates UART1 RxD, PWM30, INT4 falling-edge interrupt) that powers up in weak-pull-up quasi-bidirectional mode and is used with P3.1/P3.2 for USB ISP boot selection, so these three pins must not all be low at power-up if user code is to run."
      },
      {
        "number": "16",
        "name": "P3.1/PWM31/TxD",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.1 (alternates UART1 TxD and PWM31) that powers up in weak-pull-up quasi-bidirectional mode and is part of the ISP download/emulation interface."
      },
      {
        "number": "17",
        "name": "P3.2/PWM32/INT0/SCLK_4/I2CSCL_4",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.2 (alternates external interrupt INT0 with rising/falling edge support, PWM32, SCLK_4, I2C SCL_4) that powers up as a high-impedance input and is part of the USB ISP boot-selection check at power-up."
      },
      {
        "number": "18",
        "name": "P3.3/PWM33/INT1/MISO_4/I2CSDA_4",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.3 (alternates external interrupt INT1 with rising/falling edge support, PWM33, MISO_4, I2C SDA_4) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "19",
        "name": "P3.4/PWM34/T0/T1CLKO/ECI_2/MOSI_4/CMPO",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.4 (alternates Timer 0 external input T0, T1CLKO, ECI_2, MOSI_4, comparator output CMPO, PWM34) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "20",
        "name": "P3.5/PWM35/T1/T0CLKO/SS_4/CCP0_2/PWMFLT",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.5 (alternates Timer 1 external input T1, T0CLKO, SS_4, CCP0_2, PWMFLT, PWM35) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "21",
        "name": "P3.6/PWM36/INT2/RxD_2/CMP-/CCP1_2",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.6 (alternates external interrupt INT2 falling-edge only, UART2 RxD_2, comparator input CMP-, CCP1_2, PWM36) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "22",
        "name": "P3.7/PWM37/INT3/TxD_2/CMP+/CCP2_2/CCP2",
        "type": "bidirectional",
        "description": "General-purpose I/O P3.7 (alternates external interrupt INT3 falling-edge only, UART2 TxD_2, comparator input CMP+, CCP2_2, CCP2, PWM37) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "23",
        "name": "P2.0/PWM20/A8",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.0 (alternates PWM20 and address bit A8) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "24",
        "name": "P2.1/PWM21/A9",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.1 (alternates PWM21 and address bit A9) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "25",
        "name": "P2.2/PWM22/A10/SS_2",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.2 (alternates PWM22, address bit A10, SPI SS_2) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "26",
        "name": "P2.3/PWM23/A11/MOSI_2",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.3 (alternates PWM23, address bit A11, SPI MOSI_2) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "27",
        "name": "P2.4/PWM24/A12/ECI_3/I2CSDA_2/MISO_2",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.4 (alternates PWM24, address bit A12, ECI_3, I2C SDA_2, SPI MISO_2) that powers up as a high-impedance input and must have its mode set before use."
      },
      {
        "number": "28",
        "name": "P2.5/PWM25/A13/CCP0_3/I2CSCL_2/SCLK_2",
        "type": "bidirectional",
        "description": "General-purpose I/O P2.5 (alternates PWM25, address bit A13, CCP0_3, I2C SCL_2, SPI SCLK_2) that powers up as a high-impedance input and must have its mode set before use."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pinout is taken from the SOP28/SKDIP28 pin diagram on PDF page 33, which the datasheet presents ; Pin 9 and pin 10 (P1.6/P1.7) are shared with the external crystal/clock function. Their GPIO use dep; Pins 1, 2 and 23-28 list address alternates (A8-A15). The datasheet states the external 64 KB bus ca"
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        "at": "2026-10-19T08:50:22"
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  "metadata": {
    "specs": {
      "Manufacturer": "STC Micro",
      "Package": "SOP-28",
      "Category": "Embedded Processors & Controllers",
      "Pins": "28"
    },
    "appearance": {
      "housing": {
        "quote": "Accumulator contents and the contents of a sixteen-bit base register, which may be either the Data Pointer or the PC. In the latter case, the PC is incremented to the address of the following",
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        "material": "PC"
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          "name": "Input low voltage (Schmitt trigger open)",
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          "min": null,
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          "max": 0.99,
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          "source_page": 866,
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        },
        {
          "name": "Input low voltage (Schmitt trigger closed)",
          "symbol": "VIL1",
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          "min": null,
          "typ": null,
          "max": 1.07,
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          "name": "Input high voltage, normal I/O (Schmitt trigger open)",
          "symbol": "VIH1",
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          "min": 1.18,
          "typ": null,
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        {
          "name": "Input high voltage, normal I/O (Schmitt trigger closed)",
          "symbol": "VIH1",
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          "min": 1.09,
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          "name": "Input high voltage, reset pin (as printed)",
          "symbol": "VIH2",
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        {
          "name": "Logic 1 to 0 transition current",
          "symbol": "ITL",
          "kind": "electrical",
          "unit": "uA",
          "min": 100,
          "typ": 270,
          "max": 600,
          "conditions": "端口电压 2.0V",
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        {
          "name": "Logic 0 input current",
          "symbol": "IIL",
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          "min": null,
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        {
          "name": "High-level output current, bidirectional mode",
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          "min": 200,
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        {
          "name": "I/O port pull-up resistor",
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        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
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          "name": "Operating temperature",
          "symbol": "",
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          "unit": "℃",
          "min": -40,
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          "name": "Operating voltage",
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        {
          "name": "VDD to ground voltage",
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          "min": -0.3,
          "typ": null,
          "max": 5.5,
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        {
          "name": "I/O port to ground voltage",
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