ST10F276Z5T3

{
  "schema_version": 1,
  "type": "component",
  "slug": "st10f276z5t3",
  "title": "ST10F276Z5T3",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-144(20x20). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "st10f276z5t3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ST10F276Z5T3",
    "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/8588924028476538880",
    "parts": {
      "symbol": "st10f276z5t3.kicad_sym",
      "footprint": "st10f276z5t3.kicad_mod",
      "model_3d": "st10f276z5t3-hero.glb",
      "model_3d_plain": "st10f276z5t3.glb",
      "model_3d_step": "st10f276z5t3-etched.step",
      "model_3d_step_plain": "st10f276z5t3.step",
      "lbr": "st10f276z5t3.lbr"
    },
    "distributor_links": {
      "lcsc": "C1340853",
      "digikey": "497-19635-ND",
      "mouser": "511-ST10F276Z5T3"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:24:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-19635-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "511-ST10F276Z5T3",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P6.0",
        "type": "bidirectional",
        "description": "Port 6 bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function Chip Select 0 output."
      },
      {
        "number": "2",
        "name": "P6.1",
        "type": "bidirectional",
        "description": "Port 6 bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function Chip Select 1 output."
      },
      {
        "number": "3",
        "name": "P6.2",
        "type": "bidirectional",
        "description": "Port 6 bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function Chip Select 2 output."
      },
      {
        "number": "4",
        "name": "P6.3",
        "type": "bidirectional",
        "description": "Port 6 bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function Chip Select 3 output."
      },
      {
        "number": "5",
        "name": "P6.4",
        "type": "bidirectional",
        "description": "Port 6 bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function Chip Select 4 output."
      },
      {
        "number": "6",
        "name": "P6.5",
        "type": "bidirectional",
        "description": "Port 6 bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions HOLD (external master hold request input) or SCLK1 (SSC1 master clock output/slave clock input)."
      },
      {
        "number": "7",
        "name": "P6.6",
        "type": "bidirectional",
        "description": "Port 6 bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions HLDA (hold acknowledge output) or MTSR1 (SSC1 master-transmitter/slave-receiver)."
      },
      {
        "number": "8",
        "name": "P6.7",
        "type": "bidirectional",
        "description": "Port 6 bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions BREQ (bus request output) or MRST1 (SSC1 master-receiver/slave-transmitter)."
      },
      {
        "number": "9",
        "name": "P8.0",
        "type": "bidirectional",
        "description": "Port 8 bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions XPWM0 (PWM1 channel 0 output) or CC16IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "10",
        "name": "P8.1",
        "type": "bidirectional",
        "description": "Port 8 bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions XPWM1 (PWM1 channel 1 output) or CC17IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "11",
        "name": "P8.2",
        "type": "bidirectional",
        "description": "Port 8 bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions XPWM2 (PWM1 channel 2 output) or CC18IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "12",
        "name": "P8.3",
        "type": "bidirectional",
        "description": "Port 8 bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions XPWM3 (PWM1 channel 3 output) or CC19IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "13",
        "name": "P8.4",
        "type": "bidirectional",
        "description": "Port 8 bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC20IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "14",
        "name": "P8.5",
        "type": "bidirectional",
        "description": "Port 8 bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC21IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "15",
        "name": "P8.6",
        "type": "bidirectional",
        "description": "Port 8 bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions RxD1 (ASC1 data input asynchronous or I/O synchronous) or CC22IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "16",
        "name": "P8.7",
        "type": "bidirectional",
        "description": "Port 8 bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions TxD1 (ASC1 clock/data output asynchronous/synchronous) or CC23IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "18",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "19",
        "name": "P7.0",
        "type": "bidirectional",
        "description": "Port 7 bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function POUT0 (PWM0 channel 0 output)."
      },
      {
        "number": "20",
        "name": "P7.1",
        "type": "bidirectional",
        "description": "Port 7 bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function POUT1 (PWM0 channel 1 output)."
      },
      {
        "number": "21",
        "name": "P7.2",
        "type": "bidirectional",
        "description": "Port 7 bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function POUT2 (PWM0 channel 2 output)."
      },
      {
        "number": "22",
        "name": "P7.3",
        "type": "bidirectional",
        "description": "Port 7 bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function POUT3 (PWM0 channel 3 output)."
      },
      {
        "number": "23",
        "name": "P7.4",
        "type": "bidirectional",
        "description": "Port 7 bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC28IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "24",
        "name": "P7.5",
        "type": "bidirectional",
        "description": "Port 7 bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC29IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "25",
        "name": "P7.6",
        "type": "bidirectional",
        "description": "Port 7 bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC30IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "26",
        "name": "P7.7",
        "type": "bidirectional",
        "description": "Port 7 bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC31IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "27",
        "name": "P5.0",
        "type": "input",
        "description": "Port 5 bit 0: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN0 or timer input."
      },
      {
        "number": "28",
        "name": "P5.1",
        "type": "input",
        "description": "Port 5 bit 1: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN1 or timer input."
      },
      {
        "number": "29",
        "name": "P5.2",
        "type": "input",
        "description": "Port 5 bit 2: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN2 or timer input."
      },
      {
        "number": "30",
        "name": "P5.3",
        "type": "input",
        "description": "Port 5 bit 3: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN3 or timer input."
      },
      {
        "number": "31",
        "name": "P5.4",
        "type": "input",
        "description": "Port 5 bit 4: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN4 or timer input."
      },
      {
        "number": "32",
        "name": "P5.5",
        "type": "input",
        "description": "Port 5 bit 5: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN5 or timer input."
      },
      {
        "number": "33",
        "name": "P5.6",
        "type": "input",
        "description": "Port 5 bit 6: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN6 or timer input."
      },
      {
        "number": "34",
        "name": "P5.7",
        "type": "input",
        "description": "Port 5 bit 7: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN7 or timer input."
      },
      {
        "number": "35",
        "name": "P5.8",
        "type": "input",
        "description": "Port 5 bit 8: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN8 or timer input."
      },
      {
        "number": "36",
        "name": "P5.9",
        "type": "input",
        "description": "Port 5 bit 9: 16-bit input-only with Schmitt-trigger characteristics, selectable TTL/CMOS threshold; analog input channel AN9 or timer input."
      },
      {
        "number": "37",
        "name": "VAREF",
        "type": "passive",
        "description": "A/D converter reference voltage and analog supply for analog circuit biasing."
      },
      {
        "number": "38",
        "name": "VAGND",
        "type": "passive",
        "description": "A/D converter reference and analog ground."
      },
      {
        "number": "39",
        "name": "P5.10",
        "type": "input",
        "description": "Port 5 bit 10: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN10 or alternate function T6EUD (GPT2 timer T6 external up/down control input)."
      },
      {
        "number": "40",
        "name": "P5.11",
        "type": "input",
        "description": "Port 5 bit 11: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN11 or alternate function T5EUD (GPT2 timer T5 external up/down control input)."
      },
      {
        "number": "41",
        "name": "P5.12",
        "type": "input",
        "description": "Port 5 bit 12: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN12 or alternate function T6IN (GPT2 timer T6 count input)."
      },
      {
        "number": "42",
        "name": "P5.13",
        "type": "input",
        "description": "Port 5 bit 13: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN13 or alternate function T5IN (GPT2 timer T5 count input)."
      },
      {
        "number": "43",
        "name": "P5.14",
        "type": "input",
        "description": "Port 5 bit 14: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN14 or alternate function T4EUD (GPT1 timer T4 external up/down control input)."
      },
      {
        "number": "44",
        "name": "P5.15",
        "type": "input",
        "description": "Port 5 bit 15: 16-bit input-only with Schmitt-trigger characteristics; analog input channel AN15 or alternate function T2EUD (GPT1 timer T2 external up/down control input)."
      },
      {
        "number": "45",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "46",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "47",
        "name": "P2.0",
        "type": "bidirectional",
        "description": "Port 2 bit 0: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC0IO (CAPCOM capture/compare)."
      },
      {
        "number": "48",
        "name": "P2.1",
        "type": "bidirectional",
        "description": "Port 2 bit 1: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC1IO (CAPCOM capture/compare)."
      },
      {
        "number": "49",
        "name": "P2.2",
        "type": "bidirectional",
        "description": "Port 2 bit 2: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC2IO (CAPCOM capture/compare)."
      },
      {
        "number": "50",
        "name": "P2.3",
        "type": "bidirectional",
        "description": "Port 2 bit 3: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC3IO (CAPCOM capture/compare)."
      },
      {
        "number": "51",
        "name": "P2.4",
        "type": "bidirectional",
        "description": "Port 2 bit 4: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC4IO (CAPCOM capture/compare)."
      },
      {
        "number": "52",
        "name": "P2.5",
        "type": "bidirectional",
        "description": "Port 2 bit 5: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC5IO (CAPCOM capture/compare)."
      },
      {
        "number": "53",
        "name": "P2.6",
        "type": "bidirectional",
        "description": "Port 2 bit 6: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC6IO (CAPCOM capture/compare)."
      },
      {
        "number": "54",
        "name": "P2.7",
        "type": "bidirectional",
        "description": "Port 2 bit 7: 16-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CC7IO (CAPCOM capture/compare)."
      },
      {
        "number": "55",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "56",
        "name": "V18",
        "type": "power_out",
        "description": "1.8V decoupling pin; 10nF typical (max 100nF) decoupling capacitor required between this pin and nearest VSS."
      },
      {
        "number": "57",
        "name": "P2.8",
        "type": "bidirectional",
        "description": "Port 2 bit 8: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC8IO (CAPCOM capture/compare) or EX0IN (fast external interrupt 0 input)."
      },
      {
        "number": "58",
        "name": "P2.9",
        "type": "bidirectional",
        "description": "Port 2 bit 9: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC9IO (CAPCOM capture/compare) or EX1IN (fast external interrupt 1 input)."
      },
      {
        "number": "59",
        "name": "P2.10",
        "type": "bidirectional",
        "description": "Port 2 bit 10: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC10IO (CAPCOM capture/compare) or EX2IN (fast external interrupt 2 input)."
      },
      {
        "number": "60",
        "name": "P2.11",
        "type": "bidirectional",
        "description": "Port 2 bit 11: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC11IO (CAPCOM capture/compare) or EX3IN (fast external interrupt 3 input)."
      },
      {
        "number": "61",
        "name": "P2.12",
        "type": "bidirectional",
        "description": "Port 2 bit 12: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC12IO (CAPCOM capture/compare) or EX4IN (fast external interrupt 4 input)."
      },
      {
        "number": "62",
        "name": "P2.13",
        "type": "bidirectional",
        "description": "Port 2 bit 13: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC13IO (CAPCOM capture/compare) or EX5IN (fast external interrupt 5 input)."
      },
      {
        "number": "63",
        "name": "P2.14",
        "type": "bidirectional",
        "description": "Port 2 bit 14: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC14IO (CAPCOM capture/compare) or EX6IN (fast external interrupt 6 input)."
      },
      {
        "number": "64",
        "name": "P2.15",
        "type": "bidirectional",
        "description": "Port 2 bit 15: 16-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate functions CC15IO (CAPCOM capture/compare), EX7IN (fast external interrupt 7 input), or T7IN (CAPCOM2 timer T7 count input)."
      },
      {
        "number": "65",
        "name": "P3.0",
        "type": "bidirectional",
        "description": "Port 3 bit 0: 15-bit (P3.14 missing) bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T0IN (CAPCOM1 timer T0 count input)."
      },
      {
        "number": "66",
        "name": "P3.1",
        "type": "bidirectional",
        "description": "Port 3 bit 1: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T6OUT (GPT2 timer T6 toggle latch output)."
      },
      {
        "number": "67",
        "name": "P3.2",
        "type": "bidirectional",
        "description": "Port 3 bit 2: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CAPIN (GPT2 register CAPREL capture input)."
      },
      {
        "number": "68",
        "name": "P3.3",
        "type": "bidirectional",
        "description": "Port 3 bit 3: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T3OUT (GPT1 timer T3 toggle latch output)."
      },
      {
        "number": "69",
        "name": "P3.4",
        "type": "bidirectional",
        "description": "Port 3 bit 4: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T3EUD (GPT1 timer T3 external up/down control input)."
      },
      {
        "number": "70",
        "name": "P3.5",
        "type": "bidirectional",
        "description": "Port 3 bit 5: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T4IN (GPT1 timer T4 count/gate/reload/capture input)."
      },
      {
        "number": "71",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "72",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "73",
        "name": "P3.6",
        "type": "bidirectional",
        "description": "Port 3 bit 6: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T3IN (GPT1 timer T3 count/gate input)."
      },
      {
        "number": "74",
        "name": "P3.7",
        "type": "bidirectional",
        "description": "Port 3 bit 7: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function T2IN (GPT1 timer T2 count/gate/reload/capture input)."
      },
      {
        "number": "75",
        "name": "P3.8",
        "type": "bidirectional",
        "description": "Port 3 bit 8: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function MRST0 (SSC0 master-receiver/slave-transmitter I/O)."
      },
      {
        "number": "76",
        "name": "P3.9",
        "type": "bidirectional",
        "description": "Port 3 bit 9: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function MTSR0 (SSC0 master-transmitter/slave-receiver O/I)."
      },
      {
        "number": "77",
        "name": "P3.10",
        "type": "bidirectional",
        "description": "Port 3 bit 10: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function TxD0 (ASC0 clock/data output asynchronous/synchronous)."
      },
      {
        "number": "78",
        "name": "P3.11",
        "type": "bidirectional",
        "description": "Port 3 bit 11: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function RxD0 (ASC0 data input asynchronous or I/O synchronous)."
      },
      {
        "number": "79",
        "name": "P3.12",
        "type": "bidirectional",
        "description": "Port 3 bit 12: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate functions BHE (external memory high byte enable) or WRH (external memory high byte write strobe)."
      },
      {
        "number": "80",
        "name": "P3.13",
        "type": "bidirectional",
        "description": "Port 3 bit 13: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function SCLK0 (SSC0 master clock output/slave clock input)."
      },
      {
        "number": "81",
        "name": "P3.15",
        "type": "bidirectional",
        "description": "Port 3 bit 15: 15-bit bidirectional I/O with selectable TTL/CMOS threshold and programmable push-pull/open-drain output; alternate function CLKOUT (system clock output with programmable divider)."
      },
      {
        "number": "82",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "83",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "84",
        "name": "RPD",
        "type": "passive",
        "description": "Timing pin for return from interruptible power-down mode and synchronous/asynchronous reset selection."
      },
      {
        "number": "85",
        "name": "P4.0",
        "type": "bidirectional",
        "description": "Port 4 bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate function A16 (segment address line)."
      },
      {
        "number": "86",
        "name": "P4.1",
        "type": "bidirectional",
        "description": "Port 4 bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate function A17 (segment address line)."
      },
      {
        "number": "87",
        "name": "P4.2",
        "type": "bidirectional",
        "description": "Port 4 bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate function A18 (segment address line)."
      },
      {
        "number": "88",
        "name": "P4.3",
        "type": "bidirectional",
        "description": "Port 4 bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; alternate function A19 (segment address line)."
      },
      {
        "number": "89",
        "name": "P4.4",
        "type": "bidirectional",
        "description": "Port 4 bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and push-pull/open-drain output; alternate functions A20 (segment address line), CAN2_RxD (CAN2 receive data input), or SCL (I2C serial clock)."
      },
      {
        "number": "90",
        "name": "P4.5",
        "type": "bidirectional",
        "description": "Port 4 bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and push-pull/open-drain output; alternate functions A21 (segment address line), CAN1_RxD (CAN1 receive data input), or CAN2_RxD (CAN2 receive data input)."
      },
      {
        "number": "91",
        "name": "P4.6",
        "type": "bidirectional",
        "description": "Port 4 bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and push-pull/open-drain output; alternate functions A22 (segment address line), CAN1_TxD (CAN1 transmit data output), or CAN2_TxD (CAN2 transmit data output)."
      },
      {
        "number": "92",
        "name": "P4.7",
        "type": "bidirectional",
        "description": "Port 4 bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold and push-pull/open-drain output; alternate functions A23 (most significant segment address line), CAN2_TxD (CAN2 transmit data output), or SDA (I2C serial data)."
      },
      {
        "number": "93",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "94",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "95",
        "name": "RD",
        "type": "output",
        "description": "External memory read strobe output; activated for every external instruction or data read access."
      },
      {
        "number": "96",
        "name": "WR/WRL",
        "type": "output",
        "description": "External memory write strobe output; WR-mode activated for every external data write access; WRL-mode for low byte writes on 16-bit bus or every write on 8-bit bus."
      },
      {
        "number": "97",
        "name": "READY",
        "type": "input",
        "description": "Ready input with programmable active level; when enabled, inactive level during external memory access forces wait-state insertion until pin returns to active level."
      },
      {
        "number": "98",
        "name": "ALE",
        "type": "output",
        "description": "Address latch enable output; provides address line latch command for external addressing or multiplexed bus mode."
      },
      {
        "number": "99",
        "name": "EA/VSTBY",
        "type": "input",
        "description": "External access enable input; low level during/after reset forces program start from external memory, high level forces internal memory startup; 4.5-5.5V during operation, 4.0-6.0V for standby bias."
      },
      {
        "number": "100",
        "name": "P0L.0",
        "type": "bidirectional",
        "description": "Port 0 lower bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D0, multiplexed bus mode address/data AD0."
      },
      {
        "number": "101",
        "name": "P0L.1",
        "type": "bidirectional",
        "description": "Port 0 lower bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D1, multiplexed bus mode address/data AD1."
      },
      {
        "number": "102",
        "name": "P0L.2",
        "type": "bidirectional",
        "description": "Port 0 lower bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D2, multiplexed bus mode address/data AD2."
      },
      {
        "number": "103",
        "name": "P0L.3",
        "type": "bidirectional",
        "description": "Port 0 lower bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D3, multiplexed bus mode address/data AD3."
      },
      {
        "number": "104",
        "name": "P0L.4",
        "type": "bidirectional",
        "description": "Port 0 lower bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D4, multiplexed bus mode address/data AD4."
      },
      {
        "number": "105",
        "name": "P0L.5",
        "type": "bidirectional",
        "description": "Port 0 lower bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D5, multiplexed bus mode address/data AD5."
      },
      {
        "number": "106",
        "name": "P0L.6",
        "type": "bidirectional",
        "description": "Port 0 lower bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D6, multiplexed bus mode address/data AD6."
      },
      {
        "number": "107",
        "name": "P0L.7",
        "type": "bidirectional",
        "description": "Port 0 lower bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D7, multiplexed bus mode address/data AD7."
      },
      {
        "number": "108",
        "name": "P0H.0",
        "type": "bidirectional",
        "description": "Port 0 upper bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D8, multiplexed bus mode address/data AD8."
      },
      {
        "number": "109",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "110",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "111",
        "name": "P0H.1",
        "type": "bidirectional",
        "description": "Port 0 upper bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D9, multiplexed bus mode address/data AD9."
      },
      {
        "number": "112",
        "name": "P0H.2",
        "type": "bidirectional",
        "description": "Port 0 upper bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D10, multiplexed bus mode address/data AD10."
      },
      {
        "number": "113",
        "name": "P0H.3",
        "type": "bidirectional",
        "description": "Port 0 upper bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D11, multiplexed bus mode address/data AD11."
      },
      {
        "number": "114",
        "name": "P0H.4",
        "type": "bidirectional",
        "description": "Port 0 upper bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D12, multiplexed bus mode address/data AD12."
      },
      {
        "number": "115",
        "name": "P0H.5",
        "type": "bidirectional",
        "description": "Port 0 upper bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D13, multiplexed bus mode address/data AD13."
      },
      {
        "number": "116",
        "name": "P0H.6",
        "type": "bidirectional",
        "description": "Port 0 upper bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D14, multiplexed bus mode address/data AD14."
      },
      {
        "number": "117",
        "name": "P0H.7",
        "type": "bidirectional",
        "description": "Port 0 upper bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode data bit D15, multiplexed bus mode address/data AD15."
      },
      {
        "number": "118",
        "name": "P1L.0",
        "type": "bidirectional",
        "description": "Port 1 lower bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A0; analog input channel AN16 with priority."
      },
      {
        "number": "119",
        "name": "P1L.1",
        "type": "bidirectional",
        "description": "Port 1 lower bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A1; analog input channel AN17 with priority."
      },
      {
        "number": "120",
        "name": "P1L.2",
        "type": "bidirectional",
        "description": "Port 1 lower bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A2; analog input channel AN18 with priority."
      },
      {
        "number": "121",
        "name": "P1L.3",
        "type": "bidirectional",
        "description": "Port 1 lower bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A3; analog input channel AN19 with priority."
      },
      {
        "number": "122",
        "name": "P1L.4",
        "type": "bidirectional",
        "description": "Port 1 lower bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A4; analog input channel AN20 with priority."
      },
      {
        "number": "123",
        "name": "P1L.5",
        "type": "bidirectional",
        "description": "Port 1 lower bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A5; analog input channel AN21 with priority."
      },
      {
        "number": "124",
        "name": "P1L.6",
        "type": "bidirectional",
        "description": "Port 1 lower bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A6; analog input channel AN22 with priority."
      },
      {
        "number": "125",
        "name": "P1L.7",
        "type": "bidirectional",
        "description": "Port 1 lower bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A7; analog input channel AN23 with priority."
      },
      {
        "number": "126",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "127",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "128",
        "name": "P1H.0",
        "type": "bidirectional",
        "description": "Port 1 upper bit 0: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A8; alternate function CC24IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "129",
        "name": "P1H.1",
        "type": "bidirectional",
        "description": "Port 1 upper bit 1: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A9; alternate function CC25IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "130",
        "name": "P1H.2",
        "type": "bidirectional",
        "description": "Port 1 upper bit 2: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A10."
      },
      {
        "number": "131",
        "name": "P1H.3",
        "type": "bidirectional",
        "description": "Port 1 upper bit 3: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A11."
      },
      {
        "number": "132",
        "name": "P1H.4",
        "type": "bidirectional",
        "description": "Port 1 upper bit 4: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A12; alternate function CC24IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "133",
        "name": "P1H.5",
        "type": "bidirectional",
        "description": "Port 1 upper bit 5: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A13; alternate function CC25IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "134",
        "name": "P1H.6",
        "type": "bidirectional",
        "description": "Port 1 upper bit 6: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A14; alternate function CC26IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "135",
        "name": "P1H.7",
        "type": "bidirectional",
        "description": "Port 1 upper bit 7: 8-bit bidirectional I/O with selectable TTL/CMOS threshold; demultiplexed bus mode address bit A15; alternate function CC27IO (CAPCOM2 capture/compare)."
      },
      {
        "number": "136",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply voltage +5V ±10% during normal operation, idle and power-down modes."
      },
      {
        "number": "137",
        "name": "XTAL2",
        "type": "output",
        "description": "Main oscillator amplifier circuit output; leave unconnected when driving XTAL1 directly from external source."
      },
      {
        "number": "138",
        "name": "XTAL1",
        "type": "input",
        "description": "Main oscillator amplifier circuit input and/or external clock input for CPU clock generation."
      },
      {
        "number": "139",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "140",
        "name": "RSTIN",
        "type": "input",
        "description": "Reset input with CMOS Schmitt-trigger characteristics; low level for specified duration resets device; internal pull-up permits power-on reset with capacitor to VSS."
      },
      {
        "number": "141",
        "name": "RSTOUT",
        "type": "output",
        "description": "Internal reset indication output; driven low during hardware, software, or watchdog timer reset until EINIT instruction execution."
      },
      {
        "number": "142",
        "name": "NMI",
        "type": "input",
        "description": "Non-maskable interrupt input; high-to-low transition vectors CPU to NMI trap routine; must be pulled high externally if not used."
      },
      {
        "number": "143",
        "name": "XTAL3",
        "type": "input",
        "description": "32kHz oscillator amplifier circuit input; must use crystal oscillator, not external clock source; tie to ground if not used."
      },
      {
        "number": "144",
        "name": "XTAL4",
        "type": "output",
        "description": "32kHz oscillator amplifier circuit output; leave open when 32kHz oscillator not used."
      }
    ],
    "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: P3.14 missing: Datasheet states '15-bit (P3.14 is missing) bidirectional I/O port' for Port 3 on pag",
          "20/144 pins cited to the wrong page (name found elsewhere): ['101:P0L.1@p22', '102:P0L.2@p22', '103:P0L.3@p22', '104:P0L.4@p22']"
        ],
        "pages_sent": 70,
        "cost_usd": 0.5999,
        "at": "2026-10-05T20:23:53"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588924028476538880",
        "pages": 240,
        "sha256": "7787cf3fb6171d2c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 144,
        "described": 144,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-144(20x20)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "144"
    }
  },
  "variants": [],
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  "discovery_pitch": "ST10F276Z5T3 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
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