AT32F421C8T7

{
  "schema_version": 1,
  "type": "component",
  "slug": "at32f421c8t7",
  "title": "AT32F421C8T7",
  "brief": "ARTERY Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). 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",
    "at32f421c8t7",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "AT32F421C8T7",
    "manufacturer": "ARTERY",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893492143927296",
    "parts": {
      "symbol": "at32f421c8t7.kicad_sym",
      "footprint": "at32f421c8t7.kicad_mod",
      "model_3d": "at32f421c8t7-hero.glb",
      "model_3d_plain": "at32f421c8t7.glb",
      "model_3d_step": "at32f421c8t7-etched.step",
      "model_3d_step_plain": "at32f421c8t7.step",
      "lbr": "at32f421c8t7.lbr"
    },
    "distributor_links": {
      "lcsc": "C2687447"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T21:14:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 550 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply for I/O pins, ERTC, external 32 kHz oscillator, backup registers and internal regulator, specified at 2.4 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) general-purpose I/O with TAMPER-RTC and WKUP2 functions."
      },
      {
        "number": "3",
        "name": "PC14/OSC32_IN",
        "type": "bidirectional",
        "description": "Standard-level (TC) I/O whose alternate function OSC32_IN is the input of the 32.768 kHz LSE oscillator."
      },
      {
        "number": "4",
        "name": "PC15/OSC32_OUT",
        "type": "bidirectional",
        "description": "Standard-level (TC) I/O whose alternate function OSC32_OUT is the output of the 32.768 kHz LSE oscillator."
      },
      {
        "number": "5",
        "name": "PF0/OSC_IN",
        "type": "bidirectional",
        "description": "Standard-level (TC) I/O whose alternate function OSC_IN is the 4-25 MHz HSE oscillator input; also I2C1_SDA."
      },
      {
        "number": "6",
        "name": "PF1/OSC_OUT",
        "type": "bidirectional",
        "description": "Standard-level (TC) I/O whose alternate function OSC_OUT is the HSE oscillator output; also I2C1_SCL."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Active-low device reset input and internal reset output with a non-disconnectable internal weak pull-up (RPU typically 40 kΩ, 30-50 kΩ)."
      },
      {
        "number": "8",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground and negative reference voltage; VSSA must be connected to VSS."
      },
      {
        "number": "9",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply for the ADC and COMP (2.4-3.6 V, must be connected to VDD with at most 300 mV difference) and positive ADC reference voltage."
      },
      {
        "number": "10",
        "name": "PA0",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input, not in analog mode) with ADC_IN0, COMP_INP2, COMP_INM6, WKUP1, TMR1_ETR, USART2_CTS, I2C2_SCL and COMP_OUT functions."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN1, COMP_INP1, TMR15_CH1N, USART2_RTS, I2C2_SDA and EVENTOUT functions."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN2, COMP2_INM7, TMR15_CH1 and USART2_TX functions."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN3, TMR15_CH2, USART2_RX and I2S2_MCK functions."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN4, COMP_INM4, TMR14_CH1, USART2_CK, SPI1_NSS and I2S1_WS functions."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN5, COMP_INP0, COMP_INM5, SPI1_SCK and I2S1_CK functions."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN6, TMR1_BKIN, TMR3_CH1, TMR16_CH1, SPI1_MISO, I2S1_MCK, I2S2_MCK, COMP_OUT and EVENTOUT functions."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN7, TMR1_CH1N, TMR3_CH2, TMR14_CH1, TMR17_CH1, SPI1_MOSI, I2S1_SD and EVENTOUT functions."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN8, TMR1_CH2N, TMR3_CH3, USART2_RX, I2S1_MCK and EVENTOUT functions."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN9, TMR1_CH3N, TMR3_CH4, TMR14_CH1, SPI2_SCK and I2S2_CK functions."
      },
      {
        "number": "20",
        "name": "PB2",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN10 and TMR3_ETR functions."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with SPI2_SCK, I2S2_CK and I2C2_SCL functions."
      },
      {
        "number": "22",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with I2C2_SDA and EVENTOUT functions."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 2.4 V to 3.6 V."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN11, TMR1_BKIN, TMR15_BKIN, SPI2_NSS, I2S2_WS, I2C2_SMBA and EVENTOUT functions."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN12, TMR1_CH1N, SPI2_SCK, I2S2_CK and I2C2_SCL functions."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN13, TMR1_CH2N, TMR15_CH1, SPI2_MISO, I2S2_MCK and I2C2_SDA functions."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "FTa I/O (5 V-tolerant only as digital input) with ADC_IN14, RTC_REFIN, WKUP7, TMR1_CH3N, TMR15_CH2, TMR15_CH1N, SPI2_MOSI and I2S2_SD functions."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR1_CH1, USART1_CK, UART2_TX (as printed), I2C2_SCL, CLKOUT and EVENTOUT functions."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR1_CH2, TMR15_BKIN, USART1_TX, I2C1_SCL, I2C2_SMBA and CLKOUT functions; USART1_TX is used by the bootloader."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR1_CH3, TMR17_BKIN, USART1_RX and I2C1_SDA functions; USART1_RX is used by the bootloader."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR1_CH4, USART1_CTS, I2C1_SMBA, I2C2_SCL, COMP_OUT and EVENTOUT functions."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR1_ETR, USART1_RTS, I2C2_SDA and EVENTOUT functions."
      },
      {
        "number": "34",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O that is configured as SWDIO after reset with internal pull-up enabled; also IR_OUT, SPI2_MISO and I2S2_MCK."
      },
      {
        "number": "35",
        "name": "PF6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with I2C2_SCL function."
      },
      {
        "number": "36",
        "name": "PF7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with I2C2_SDA function."
      },
      {
        "number": "37",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O that is configured as SWCLK after reset with internal pull-down enabled; also USART2_TX, SPI2_MOSI and I2S2_SD."
      },
      {
        "number": "38",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with USART2_RX, SPI1_NSS, I2S1_WS, SPI2_NSS, I2S2_WS and EVENTOUT functions."
      },
      {
        "number": "39",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with SPI1_SCK, I2S1_CK, SPI2_SCK, I2S2_CK and EVENTOUT functions."
      },
      {
        "number": "40",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR3_CH1, TMR17_BKIN, SPI1_MISO, I2S1_MCK, SPI2_MISO, I2S2_MCK, I2C2_SDA and EVENTOUT functions."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR3_CH2, TMR16_BKIN, SPI1_MOSI, I2S1_SD, SPI2_MOSI, I2S2_SD, I2C1_SMBA and WKUP6 functions."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR16_CH1N, USART1_TX, I2S1_MCK and I2C1_SCL functions."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR17_CH1N, USART1_RX and I2C1_SDA functions."
      },
      {
        "number": "44",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot mode selection pin 0 with a built-in weak pull-down that cannot be disabled (RPD typically 70 kΩ, 65-130 kΩ)."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR16_CH1 and I2C1_SCL functions."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O with TMR17_CH1, IR_OUT, SPI2_NSS, I2S2_WS, I2S1_MCK, I2C1_SDA and EVENTOUT functions."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 2.4 V 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-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin-to-package mapping was taken from the LQFP48 column of Table 5 (page 25-27), which is typeset in; Pin types are KiCad ERC classes derived from the datasheet's I/O codes: TC/FT/FTa/R I/O pins are map; FTa pins are 5 V tolerant only when set to digital input (floating, pull-up or pull-down); in analog"
        ],
        "pages_sent": 72,
        "cost_usd": 0.2661,
        "at": "2026-10-09T21:11:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893492143927296",
        "pages": 80,
        "sha256": "13db109fb9f3fe38",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "at32f421c8t7.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9,
          9,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9dea352d93177c2904afd7d7b68ea8855ce1ab691f69f8b3e13655600514b6bf",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "at32f421c8t7-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9,
          9,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6df196f8aa5fdbaf5d6ab3a2f6e6681db4db400951b53c7eaffa12403ed8d148",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ARTERY",
      "Package": "LQFP-48(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "48"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "at32f421c8t7"
  ],
  "discovery_pitch": "AT32F421C8T7 (ARTERY) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at32f421c8t7.kicad_sym",
    "at32f421c8t7.kicad_mod",
    "at32f421c8t7.glb",
    "at32f421c8t7.step",
    "at32f421c8t7.lbr",
    "docs/hero.png",
    "docs/at32f421c8t7-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "at32f421c8t7-hero.glb",
    "at32f421c8t7-hero.overlay.json"
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  "visibility": {
    "public": true
  }
}