ATSAM3U2CA-AU

{
  "schema_version": 1,
  "type": "component",
  "slug": "atsam3u2ca-au",
  "title": "ATSAM3U2CA-AU",
  "brief": "Microchip Tech MICROCHIP, LQFP-100(14x14). 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",
    "atsam3u2ca-au",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ATSAM3U2CA-AU",
    "manufacturer": "Microchip Tech",
    "package": "LQFP-100(14x14)",
    "pin_count": 100,
    "category": "Embedded Processors & Controllers",
    "subcategory": "MICROCHIP",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a5a6641ed9f7c973a21ba0c342b7d4e4.pdf",
    "parts": {
      "symbol": "atsam3u2ca-au.kicad_sym",
      "footprint": "atsam3u2ca-au.kicad_mod",
      "model_3d": "atsam3u2ca-au-hero.glb",
      "model_3d_plain": "atsam3u2ca-au-etched.glb",
      "model_3d_step": "atsam3u2ca-au-etched.step",
      "model_3d_step_plain": "atsam3u2ca-au.step",
      "lbr": "atsam3u2ca-au.lbr"
    },
    "distributor_links": {
      "lcsc": "C81839",
      "digikey": "ATSAM3U2CA-AU-ND",
      "mouser": "556-ATSAM3U2CA-AU"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T01:08:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAM3U2CA-AU-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-ATSAM3U2CA-AU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Powers the ADC cells with a voltage range of 2.0-3.6 V."
      },
      {
        "number": "2",
        "name": "ADVREF",
        "type": "passive",
        "description": "Voltage reference for the 10-bit ADC; conversions extend from 0 V to ADVREF."
      },
      {
        "number": "3",
        "name": "GNDANA",
        "type": "power_in",
        "description": "Separate ground pin for the ADC supply domain (VDDANA)."
      },
      {
        "number": "4",
        "name": "AD12BVREF",
        "type": "passive",
        "description": "Voltage reference for the 12-bit ADC; conversions extend from 0 V to AD12BVREF."
      },
      {
        "number": "5",
        "name": "PA22/PGMD14",
        "type": "bidirectional",
        "description": "PIOA line 22 multiplexed with the PGMD14 parallel programming data function; listed as an ADC input pin in the errata."
      },
      {
        "number": "6",
        "name": "PA30",
        "type": "bidirectional",
        "description": "PIOA line 30, listed as an ADC input pin in the errata; Table 35-4 maps TIOA2 of TC0 to this pin (peripheral B)."
      },
      {
        "number": "7",
        "name": "PB3",
        "type": "bidirectional",
        "description": "PIOB line 3, listed as an ADC input pin in the errata."
      },
      {
        "number": "8",
        "name": "PB4",
        "type": "bidirectional",
        "description": "PIOB line 4, listed as an ADC input pin in the errata; Table 35-4 maps TCLK1 of TC0 to this pin."
      },
      {
        "number": "9",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "10",
        "name": "PA13/PGMD5",
        "type": "bidirectional",
        "description": "PIOA line 13 used as SPI MISO (peripheral A) per Table 31-2, also PGMD5 programming data."
      },
      {
        "number": "11",
        "name": "PA14/PGMD6",
        "type": "bidirectional",
        "description": "PIOA line 14 used as SPI MOSI (peripheral A) per Table 31-2, also PGMD6 programming data."
      },
      {
        "number": "12",
        "name": "PA15/PGMD7",
        "type": "bidirectional",
        "description": "PIOA line 15 used as SPI SPCK (peripheral A) per Table 31-2, also PGMD7 programming data."
      },
      {
        "number": "13",
        "name": "PA16/PGMD8",
        "type": "bidirectional",
        "description": "PIOA line 16 used as SPI NPCS0 (peripheral A) per Table 31-2, also PGMD8 programming data."
      },
      {
        "number": "14",
        "name": "PA17/PGMD9",
        "type": "bidirectional",
        "description": "PIOA line 17 with PGMD9 parallel programming data function."
      },
      {
        "number": "15",
        "name": "PB16",
        "type": "bidirectional",
        "description": "PIOB line 16 general-purpose I/O."
      },
      {
        "number": "16",
        "name": "PB15",
        "type": "bidirectional",
        "description": "PIOB line 15 general-purpose I/O."
      },
      {
        "number": "17",
        "name": "PA18/PGMD10",
        "type": "bidirectional",
        "description": "PIOA line 18 with PGMD10 parallel programming data function."
      },
      {
        "number": "18",
        "name": "PA19/PGMD11",
        "type": "bidirectional",
        "description": "PIOA line 19 used as SPI NPCS3 (peripheral B) per Table 31-2, also PGMD11 programming data."
      },
      {
        "number": "19",
        "name": "PA20/PGMD12",
        "type": "bidirectional",
        "description": "PIOA line 20 with PGMD12 parallel programming data function."
      },
      {
        "number": "20",
        "name": "PA21/PGMD13",
        "type": "bidirectional",
        "description": "PIOA line 21 with PGMD13 parallel programming data function."
      },
      {
        "number": "21",
        "name": "PA23/PGMD15",
        "type": "bidirectional",
        "description": "PIOA line 23 with PGMD15 parallel programming data function."
      },
      {
        "number": "22",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines with a voltage range of 1.62-3.6 V."
      },
      {
        "number": "23",
        "name": "PA24",
        "type": "bidirectional",
        "description": "PIOA line 24 used as TWD1 (peripheral A) per Table 32-4."
      },
      {
        "number": "24",
        "name": "PA25",
        "type": "bidirectional",
        "description": "PIOA line 25 used as TWCK1 (peripheral A) per Table 32-4."
      },
      {
        "number": "25",
        "name": "PA26",
        "type": "bidirectional",
        "description": "PIOA line 26 used as SSC TD (peripheral A) per Table 30-2 and TC0 TCLK2 (peripheral B) per Table 35-4."
      },
      {
        "number": "26",
        "name": "PA0/PGMNCMD",
        "type": "bidirectional",
        "description": "PIOA line 0 used as TC0 TIOB0 (peripheral A), SPI NPCS1 (peripheral B), and PGMNCMD programming command."
      },
      {
        "number": "27",
        "name": "PA1/PGMRDY",
        "type": "bidirectional",
        "description": "PIOA line 1 used as TC0 TIOA0 (peripheral A), SPI NPCS2 (peripheral B), and PGMRDY programming status."
      },
      {
        "number": "28",
        "name": "PA2/PGMNOE",
        "type": "bidirectional",
        "description": "PIOA line 2 used as TC0 TCLK0 (peripheral A), ADC12B trigger AD12BTRG (peripheral B), and PGMNOE programming control."
      },
      {
        "number": "29",
        "name": "PA3/PGMNVALID",
        "type": "bidirectional",
        "description": "PIOA line 3 used as HSMCI MCCK (peripheral A) per Table 36-2, also PGMNVALID programming control."
      },
      {
        "number": "30",
        "name": "PA4/PGMM0",
        "type": "bidirectional",
        "description": "PIOA line 4 used as HSMCI MCCDA (peripheral A) per Table 36-2, also PGMM0 programming mode."
      },
      {
        "number": "31",
        "name": "PA5/PGMM1",
        "type": "bidirectional",
        "description": "PIOA line 5 used as HSMCI MCDA0 (peripheral A) per Table 36-2, also PGMM1 programming mode."
      },
      {
        "number": "32",
        "name": "PA6/PGMM2",
        "type": "bidirectional",
        "description": "PIOA line 6 used as HSMCI MCDA1 (peripheral A) per Table 36-2, also PGMM2 programming mode."
      },
      {
        "number": "33",
        "name": "PA7/PGMM3",
        "type": "bidirectional",
        "description": "PIOA line 7 used as HSMCI MCDA2 (peripheral A) per Table 36-2, also PGMM3 programming mode."
      },
      {
        "number": "34",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "35",
        "name": "GND",
        "type": "power_in",
        "description": "Ground shared by the VDDCORE and VDDIO supply domains."
      },
      {
        "number": "36",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines with a voltage range of 1.62-3.6 V."
      },
      {
        "number": "37",
        "name": "PA8/PGMD0",
        "type": "bidirectional",
        "description": "PIOA line 8 used as HSMCI MCDA3 (peripheral A) per Table 36-2, also PGMD0 programming data."
      },
      {
        "number": "38",
        "name": "PA9/PGMD1",
        "type": "bidirectional",
        "description": "PIOA line 9 used as TWD0 (peripheral A) per Table 32-4, also PGMD1 programming data."
      },
      {
        "number": "39",
        "name": "PA10/PGMD2",
        "type": "bidirectional",
        "description": "PIOA line 10 used as TWCK0 (peripheral A) per Table 32-4, also PGMD2 programming data."
      },
      {
        "number": "40",
        "name": "PA11/PGMD3",
        "type": "bidirectional",
        "description": "PIOA line 11 used as UART URXD (peripheral A) per Table 33-2, also PGMD3 programming data."
      },
      {
        "number": "41",
        "name": "PA12/PGMD4",
        "type": "bidirectional",
        "description": "PIOA line 12 used as UART UTXD (peripheral A) per Table 33-2, also PGMD4 programming data."
      },
      {
        "number": "42",
        "name": "FWUP",
        "type": "input",
        "description": "Fast wake-up input feeding a falling edge detector; must be high together with NRST, NRSTB and JTAGSEL to enable boundary scan during power-up."
      },
      {
        "number": "43",
        "name": "ERASE",
        "type": "input",
        "description": "Flash erase pin; the datasheet references it for reprogramming Flash content (Section 6.7) but the detailed behaviour is not in the extracted text."
      },
      {
        "number": "44",
        "name": "TST",
        "type": "input",
        "description": "Test select pin: low at power-up selects normal operation, high selects test or FFPI mode, and it has an internal pull-down of about 15 kΩ."
      },
      {
        "number": "45",
        "name": "VDDBU",
        "type": "power_in",
        "description": "Powers the slow clock oscillator and part of the System Controller with a voltage range of 1.62-3.6 V; it must be supplied before or at the same time as VDDIO and VDDCORE."
      },
      {
        "number": "46",
        "name": "GNDBU",
        "type": "power_in",
        "description": "Separate ground pin for the VDDBU backup supply domain."
      },
      {
        "number": "47",
        "name": "NRSTB",
        "type": "input",
        "description": "Reset input that, together with FWUP, NRST and JTAGSEL high while TST is low, enables IEEE 1149.1 boundary scan during power-up."
      },
      {
        "number": "48",
        "name": "JTAGSEL",
        "type": "input",
        "description": "JTAG selection input: when low, SW-DP or JTAG-DP mode is selected, and a chip reset must follow any change of its state."
      },
      {
        "number": "49",
        "name": "XOUT32",
        "type": "output",
        "description": "Output of the 32.768 kHz crystal oscillator; left unconnected if the crystal oscillator is not used."
      },
      {
        "number": "50",
        "name": "XIN32",
        "type": "input",
        "description": "Input of the 32.768 kHz crystal oscillator, which can also be driven by an external clock when OSCBYPASS is set."
      },
      {
        "number": "51",
        "name": "TDI",
        "type": "input",
        "description": "JTAG Test Data In input."
      },
      {
        "number": "52",
        "name": "VDDOUT",
        "type": "power_out",
        "description": "Output of the embedded 1.8 V voltage regulator."
      },
      {
        "number": "53",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Supply input that powers the voltage regulator."
      },
      {
        "number": "54",
        "name": "TDO/TRACESWO",
        "type": "output",
        "description": "JTAG Test Data Out, or asynchronous trace output TRACESWO in SWD mode; it is in input mode outside debug and needs an external 100 kΩ pull-up."
      },
      {
        "number": "55",
        "name": "TMS/SWDIO",
        "type": "bidirectional",
        "description": "JTAG Test Mode Select, or SWDIO serial wire data input/output in SWD mode."
      },
      {
        "number": "56",
        "name": "TCK/SWCLK",
        "type": "input",
        "description": "JTAG Test Clock, or SWCLK serial wire clock in SWD mode."
      },
      {
        "number": "57",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Microcontroller reset, active low, configured as input/output."
      },
      {
        "number": "58",
        "name": "PB24",
        "type": "bidirectional",
        "description": "PIOB line 24 general-purpose I/O."
      },
      {
        "number": "59",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "60",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines with a voltage range of 1.62-3.6 V."
      },
      {
        "number": "61",
        "name": "GND",
        "type": "power_in",
        "description": "Ground shared by the VDDCORE and VDDIO supply domains."
      },
      {
        "number": "62",
        "name": "PB23",
        "type": "bidirectional",
        "description": "PIOB line 23 general-purpose I/O."
      },
      {
        "number": "63",
        "name": "PB22",
        "type": "bidirectional",
        "description": "PIOB line 22 general-purpose I/O."
      },
      {
        "number": "64",
        "name": "PB21",
        "type": "bidirectional",
        "description": "PIOB line 21 general-purpose I/O."
      },
      {
        "number": "65",
        "name": "PB20",
        "type": "bidirectional",
        "description": "PIOB line 20 general-purpose I/O."
      },
      {
        "number": "66",
        "name": "PB19",
        "type": "bidirectional",
        "description": "PIOB line 19 general-purpose I/O."
      },
      {
        "number": "67",
        "name": "PB18",
        "type": "bidirectional",
        "description": "PIOB line 18 general-purpose I/O."
      },
      {
        "number": "68",
        "name": "PB17",
        "type": "bidirectional",
        "description": "PIOB line 17 general-purpose I/O."
      },
      {
        "number": "69",
        "name": "PB14",
        "type": "bidirectional",
        "description": "PIOB line 14 general-purpose I/O."
      },
      {
        "number": "70",
        "name": "PB10",
        "type": "bidirectional",
        "description": "PIOB line 10 general-purpose I/O."
      },
      {
        "number": "71",
        "name": "PB9",
        "type": "bidirectional",
        "description": "PIOB line 9 general-purpose I/O."
      },
      {
        "number": "72",
        "name": "GNDPLL",
        "type": "power_in",
        "description": "Separate ground for PLL A, UPLL and the 3-20 MHz oscillator."
      },
      {
        "number": "73",
        "name": "VDDPLL",
        "type": "power_in",
        "description": "Powers PLL A, UPLL and the 3-20 MHz oscillator with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "74",
        "name": "XOUT",
        "type": "output",
        "description": "Output of the 3-20 MHz crystal oscillator."
      },
      {
        "number": "75",
        "name": "XIN",
        "type": "input",
        "description": "Input of the 3-20 MHz crystal oscillator."
      },
      {
        "number": "76",
        "name": "DHSDP",
        "type": "bidirectional",
        "description": "High Speed USB Device Port differential data plus line of the embedded transceiver."
      },
      {
        "number": "77",
        "name": "DHSDM",
        "type": "bidirectional",
        "description": "High Speed USB Device Port differential data minus line of the embedded transceiver."
      },
      {
        "number": "78",
        "name": "VBG",
        "type": "passive",
        "description": "Bandgap voltage pin; the provided text gives no further electrical limits for it."
      },
      {
        "number": "79",
        "name": "VDDUTMI",
        "type": "power_in",
        "description": "Powers the UTMI+ interface with a voltage range of 3.0-3.6 V (3.3 V nominal)."
      },
      {
        "number": "80",
        "name": "DFSDM",
        "type": "bidirectional",
        "description": "Full-speed USB data minus line of the UTMI+ interface (name-based; no further description in the extracted text)."
      },
      {
        "number": "81",
        "name": "DFSDP",
        "type": "bidirectional",
        "description": "Full-speed USB data plus line of the UTMI+ interface (name-based; no further description in the extracted text)."
      },
      {
        "number": "82",
        "name": "GNDUTMI",
        "type": "power_in",
        "description": "Separate ground for the VDDUTMI supply domain."
      },
      {
        "number": "83",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "84",
        "name": "PA28",
        "type": "bidirectional",
        "description": "PIOA line 28 used as SSC TK (peripheral A) per Table 30-2."
      },
      {
        "number": "85",
        "name": "PA29",
        "type": "bidirectional",
        "description": "PIOA line 29 used as SSC RK (peripheral A) per Table 30-2."
      },
      {
        "number": "86",
        "name": "PA31",
        "type": "bidirectional",
        "description": "PIOA line 31 used as SSC RF (peripheral A) per Table 30-2 and TC0 TIOB2 (peripheral B) per Table 35-4."
      },
      {
        "number": "87",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals with a voltage range of 1.62-1.95 V."
      },
      {
        "number": "88",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines with a voltage range of 1.62-3.6 V."
      },
      {
        "number": "89",
        "name": "GND",
        "type": "power_in",
        "description": "Ground shared by the VDDCORE and VDDIO supply domains."
      },
      {
        "number": "90",
        "name": "PB0",
        "type": "bidirectional",
        "description": "PIOB line 0 general-purpose I/O."
      },
      {
        "number": "91",
        "name": "PB1",
        "type": "bidirectional",
        "description": "PIOB line 1 general-purpose I/O."
      },
      {
        "number": "92",
        "name": "PB2",
        "type": "bidirectional",
        "description": "PIOB line 2 general-purpose I/O."
      },
      {
        "number": "93",
        "name": "PB11",
        "type": "bidirectional",
        "description": "PIOB line 11 general-purpose I/O."
      },
      {
        "number": "94",
        "name": "PB12",
        "type": "bidirectional",
        "description": "PIOB line 12 general-purpose I/O."
      },
      {
        "number": "95",
        "name": "PB13",
        "type": "bidirectional",
        "description": "PIOB line 13 general-purpose I/O."
      },
      {
        "number": "96",
        "name": "PA27",
        "type": "bidirectional",
        "description": "PIOA line 27 used as SSC RD (peripheral A) per Table 30-2."
      },
      {
        "number": "97",
        "name": "PB5",
        "type": "bidirectional",
        "description": "PIOB line 5 used as TC0 TIOA1 (peripheral A) per Table 35-4."
      },
      {
        "number": "98",
        "name": "PB6",
        "type": "bidirectional",
        "description": "PIOB line 6 used as TC0 TIOB1 (peripheral A) per Table 35-4."
      },
      {
        "number": "99",
        "name": "PB7",
        "type": "bidirectional",
        "description": "PIOB line 7 general-purpose I/O."
      },
      {
        "number": "100",
        "name": "PB8",
        "type": "bidirectional",
        "description": "PIOB line 8 general-purpose I/O."
      }
    ],
    "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 14x14 mm body size is not stated anywhere in the extracted text. The 100-lead LQFP package is co; The pin list is complete for the 100-lead LQFP (pins 1–100, all present once). The 144-lead SHDN pin; Pin types are KiCad-class assignments made from the datasheet text. Pins whose type is not stated ex",
          "2/100 pins cited to the wrong page (name found elsewhere): ['74:XOUT@p15', '75:XIN@p15']"
        ],
        "pages_sent": 70,
        "cost_usd": 0.6921,
        "at": "2026-10-29T01:08:35"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a5a6641ed9f7c973a21ba0c342b7d4e4.pdf",
        "pages": 1163,
        "sha256": "b84d00c06a823c14",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 100,
        "described": 100,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atsam3u2ca-au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16,
          16,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
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