ATSAM3U1CB-AU

{
  "slug": "atsam3u1cb-au",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Pre-ordered MCUs, LQFP-100(14x14). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atsam3u1cb-au",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "component": {
    "mpn": "ATSAM3U1CB-AU",
    "manufacturer": "Microchip Tech",
    "package": "LQFP-100(14x14)",
    "pin_count": 100,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a5a6641ed9f7c973a21ba0c342b7d4e4.pdf",
    "parts": {
      "symbol": "atsam3u1cb-au.kicad_sym",
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      "model_3d_step": "atsam3u1cb-au-etched.step",
      "model_3d_step_plain": "atsam3u1cb-au.step",
      "lbr": "atsam3u1cb-au.lbr"
    },
    "distributor_links": {
      "lcsc": "C1337165",
      "digikey": "ATSAM3U1CB-AU-ND",
      "mouser": "556-ATSAM3U1CB-AU"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T18:33:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAM3U1CB-AU-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-ATSAM3U1CB-AU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDDANA",
        "type": "power_in",
        "description": "Powers the ADC cells; voltage range 2.0-3.6 V."
      },
      {
        "number": "2",
        "name": "ADVREF",
        "type": "input",
        "description": "Reference for the 10-bit ADC; conversions extend from 0 V to ADVREF."
      },
      {
        "number": "3",
        "name": "GNDANA",
        "type": "power_in",
        "description": "Separate ground for the analog (VDDANA) supply domain."
      },
      {
        "number": "4",
        "name": "AD12BVREF",
        "type": "input",
        "description": "Reference for the 12-bit ADC (ADC12B); conversions extend from 0 V to AD12BVREF."
      },
      {
        "number": "5",
        "name": "PA22/PGMD14",
        "type": "bidirectional",
        "description": "PIO line PA22 (also PGMD14 in the pin name); listed as an ADC analog input in the errata."
      },
      {
        "number": "6",
        "name": "PA30",
        "type": "bidirectional",
        "description": "PIO line PA30, which is TC0 TIOA2 (peripheral B) and SSC TF (peripheral A); listed as an ADC analog input in the errata."
      },
      {
        "number": "7",
        "name": "PB3",
        "type": "bidirectional",
        "description": "PIO line PB3; listed as an ADC analog input in the errata."
      },
      {
        "number": "8",
        "name": "PB4",
        "type": "bidirectional",
        "description": "PIO line PB4, which is TC0 TCLK1 (peripheral A); listed as an ADC analog input in the errata."
      },
      {
        "number": "9",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals; voltage range 1.62-1.95 V."
      },
      {
        "number": "10",
        "name": "PA13/PGMD5",
        "type": "bidirectional",
        "description": "PIO line PA13, which is SPI MISO (peripheral A)."
      },
      {
        "number": "11",
        "name": "PA14/PGMD6",
        "type": "bidirectional",
        "description": "PIO line PA14, which is SPI MOSI (peripheral A)."
      },
      {
        "number": "12",
        "name": "PA15/PGMD7",
        "type": "bidirectional",
        "description": "PIO line PA15, which is SPI SPCK (peripheral A)."
      },
      {
        "number": "13",
        "name": "PA16/PGMD8",
        "type": "bidirectional",
        "description": "PIO line PA16, which is SPI NPCS0 (peripheral A)."
      },
      {
        "number": "14",
        "name": "PA17/PGMD9",
        "type": "bidirectional",
        "description": "PIO line PA17; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "15",
        "name": "PB16",
        "type": "bidirectional",
        "description": "PIO line PB16; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "16",
        "name": "PB15",
        "type": "bidirectional",
        "description": "PIO line PB15; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "17",
        "name": "PA18/PGMD10",
        "type": "bidirectional",
        "description": "PIO line PA18; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "18",
        "name": "PA19/PGMD11",
        "type": "bidirectional",
        "description": "PIO line PA19, which is SPI NPCS3 (peripheral B)."
      },
      {
        "number": "19",
        "name": "PA20/PGMD12",
        "type": "bidirectional",
        "description": "PIO line PA20; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "20",
        "name": "PA21/PGMD13",
        "type": "bidirectional",
        "description": "PIO line PA21; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "21",
        "name": "PA23/PGMD15",
        "type": "bidirectional",
        "description": "PIO line PA23; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "22",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines; voltage range 1.62-3.6 V."
      },
      {
        "number": "23",
        "name": "PA24",
        "type": "bidirectional",
        "description": "PIO line PA24, which is TWI1 TWD1 (peripheral A)."
      },
      {
        "number": "24",
        "name": "PA25",
        "type": "bidirectional",
        "description": "PIO line PA25, which is TWI1 TWCK1 (peripheral A)."
      },
      {
        "number": "25",
        "name": "PA26",
        "type": "bidirectional",
        "description": "PIO line PA26, which is SSC TD (peripheral A) and TC0 TCLK2 (peripheral B)."
      },
      {
        "number": "26",
        "name": "PA0/PGMNCMD",
        "type": "bidirectional",
        "description": "PIO line PA0, which is SPI NPCS1 (peripheral B) and TC0 TIOB0 (peripheral A)."
      },
      {
        "number": "27",
        "name": "PA1/PGMRDY",
        "type": "bidirectional",
        "description": "PIO line PA1, which is SPI NPCS2 (peripheral B) and TC0 TIOA0 (peripheral A)."
      },
      {
        "number": "28",
        "name": "PA2/PGMNOE",
        "type": "bidirectional",
        "description": "PIO line PA2, which is TC0 TCLK0 (peripheral A) and ADC12B AD12BTRG (peripheral B)."
      },
      {
        "number": "29",
        "name": "PA3/PGMNVALID",
        "type": "bidirectional",
        "description": "PIO line PA3, which is HSMCI MCCK (peripheral A)."
      },
      {
        "number": "30",
        "name": "PA4/PGMM0",
        "type": "bidirectional",
        "description": "PIO line PA4, which is HSMCI MCCDA (peripheral A)."
      },
      {
        "number": "31",
        "name": "PA5/PGMM1",
        "type": "bidirectional",
        "description": "PIO line PA5, which is HSMCI MCDA0 (peripheral A)."
      },
      {
        "number": "32",
        "name": "PA6/PGMM2",
        "type": "bidirectional",
        "description": "PIO line PA6, which is HSMCI MCDA1 (peripheral A)."
      },
      {
        "number": "33",
        "name": "PA7/PGMM3",
        "type": "bidirectional",
        "description": "PIO line PA7, which is HSMCI MCDA2 (peripheral A)."
      },
      {
        "number": "34",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals; voltage range 1.62-1.95 V."
      },
      {
        "number": "35",
        "name": "GND",
        "type": "power_in",
        "description": "Ground common to the VDDCORE and VDDIO power supplies."
      },
      {
        "number": "36",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines; voltage range 1.62-3.6 V."
      },
      {
        "number": "37",
        "name": "PA8/PGMD0",
        "type": "bidirectional",
        "description": "PIO line PA8, which is HSMCI MCDA3 (peripheral A)."
      },
      {
        "number": "38",
        "name": "PA9/PGMD1",
        "type": "bidirectional",
        "description": "PIO line PA9, which is TWI0 TWD0 (peripheral A)."
      },
      {
        "number": "39",
        "name": "PA10/PGMD2",
        "type": "bidirectional",
        "description": "PIO line PA10, which is TWI0 TWCK0 (peripheral A)."
      },
      {
        "number": "40",
        "name": "PA11/PGMD3",
        "type": "bidirectional",
        "description": "PIO line PA11, which is UART URXD (peripheral A)."
      },
      {
        "number": "41",
        "name": "PA12/PGMD4",
        "type": "bidirectional",
        "description": "PIO line PA12, which is UART UTXD (peripheral A)."
      },
      {
        "number": "42",
        "name": "FWUP",
        "type": "input",
        "description": "Fast wake-up pin; boundary scan is enabled when FWUP, NRST, NRSTB and JTAGSEL are high while TST is tied low during power-up."
      },
      {
        "number": "43",
        "name": "ERASE",
        "type": "input",
        "description": "ERASE pin related to reprogramming Flash content; detailed behavior is in Section 6.7, which is not in the provided excerpt."
      },
      {
        "number": "44",
        "name": "TST",
        "type": "input",
        "description": "Test select: low at power-up selects normal operation and high selects test or FFPI mode; 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; voltage range 1.62-3.6 V and must be supplied before or at the same time as VDDIO and VDDCORE."
      },
      {
        "number": "46",
        "name": "GNDBU",
        "type": "power_in",
        "description": "Separate ground for the VDDBU backup domain."
      },
      {
        "number": "47",
        "name": "NRSTB",
        "type": "input",
        "description": "Reset-related input in the VDDBU domain per the revision history; it must be high, together with FWUP, NRST and JTAGSEL, to enable boundary scan."
      },
      {
        "number": "48",
        "name": "JTAGSEL",
        "type": "input",
        "description": "Active-high JTAG select: high enables IEEE 1149.1 boundary scan, low selects SW-DP or JTAG-DP, and a chip reset is required after changing it."
      },
      {
        "number": "49",
        "name": "XOUT32",
        "type": "output",
        "description": "Output of the 32.768 kHz crystal oscillator; leave unconnected if the crystal is not used."
      },
      {
        "number": "50",
        "name": "XIN32",
        "type": "input",
        "description": "Input of the 32.768 kHz crystal oscillator; in bypass mode an external clock is applied here and it should be left unconnected if the oscillator is unused."
      },
      {
        "number": "51",
        "name": "TDI",
        "type": "input",
        "description": "JTAG test data input for the SWJ debug port."
      },
      {
        "number": "52",
        "name": "VDDOUT",
        "type": "power_out",
        "description": "Output of the internal voltage regulator."
      },
      {
        "number": "53",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Powers the internal voltage regulator."
      },
      {
        "number": "54",
        "name": "TDO/TRACESWO",
        "type": "output",
        "description": "JTAG test data output, or asynchronous trace output (TRACESWO) in SWD mode; it is an input when not in debug mode, so an external 100 kΩ pull-up is recommended."
      },
      {
        "number": "55",
        "name": "TMS/SWDIO",
        "type": "bidirectional",
        "description": "JTAG test mode select, or serial wire data input/output (SWDIO) in SWD mode."
      },
      {
        "number": "56",
        "name": "TCK/SWCLK",
        "type": "input",
        "description": "JTAG test clock, or serial wire clock (SWCLK) 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": "PIO line PB24; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "59",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals; voltage range 1.62-1.95 V."
      },
      {
        "number": "60",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines; voltage range 1.62-3.6 V."
      },
      {
        "number": "61",
        "name": "GND",
        "type": "power_in",
        "description": "Ground common to the VDDCORE and VDDIO power supplies."
      },
      {
        "number": "62",
        "name": "PB23",
        "type": "bidirectional",
        "description": "PIO line PB23; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "63",
        "name": "PB22",
        "type": "bidirectional",
        "description": "PIO line PB22; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "64",
        "name": "PB21",
        "type": "bidirectional",
        "description": "PIO line PB21; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "65",
        "name": "PB20",
        "type": "bidirectional",
        "description": "PIO line PB20; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "66",
        "name": "PB19",
        "type": "bidirectional",
        "description": "PIO line PB19; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "67",
        "name": "PB18",
        "type": "bidirectional",
        "description": "PIO line PB18; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "68",
        "name": "PB17",
        "type": "bidirectional",
        "description": "PIO line PB17; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "69",
        "name": "PB14",
        "type": "bidirectional",
        "description": "PIO line PB14; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "70",
        "name": "PB10",
        "type": "bidirectional",
        "description": "PIO line PB10; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "71",
        "name": "PB9",
        "type": "bidirectional",
        "description": "PIO line PB9; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "72",
        "name": "GNDPLL",
        "type": "power_in",
        "description": "Separate ground for the VDDPLL domain (PLL A, UPLL and 3-20 MHz oscillator)."
      },
      {
        "number": "73",
        "name": "VDDPLL",
        "type": "power_in",
        "description": "Powers PLL A, UPLL and the 3-20 MHz oscillator; voltage range 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": "Data+ line of the High Speed USB device port with embedded transceiver."
      },
      {
        "number": "77",
        "name": "DHSDM",
        "type": "bidirectional",
        "description": "Data- line of the High Speed USB device port with embedded transceiver."
      },
      {
        "number": "78",
        "name": "VBG",
        "type": "passive",
        "description": "Bandgap voltage reference pin; no electrical limits are stated in the provided excerpt."
      },
      {
        "number": "79",
        "name": "VDDUTMI",
        "type": "power_in",
        "description": "Powers the UTMI+ interface; voltage range 3.0-3.6 V, 3.3 V nominal."
      },
      {
        "number": "80",
        "name": "DFSDM",
        "type": "bidirectional",
        "description": "USB device data- line (DFSDM), paired with DFSDP; no electrical limits are given in the provided excerpt."
      },
      {
        "number": "81",
        "name": "DFSDP",
        "type": "bidirectional",
        "description": "USB device data+ line (DFSDP), paired with DFSDM; no electrical limits are given in the provided excerpt."
      },
      {
        "number": "82",
        "name": "GNDUTMI",
        "type": "power_in",
        "description": "Separate ground for the VDDUTMI domain."
      },
      {
        "number": "83",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals; voltage range 1.62-1.95 V."
      },
      {
        "number": "84",
        "name": "PA28",
        "type": "bidirectional",
        "description": "PIO line PA28, which is SSC TK (peripheral A)."
      },
      {
        "number": "85",
        "name": "PA29",
        "type": "bidirectional",
        "description": "PIO line PA29, which is SSC RK (peripheral A)."
      },
      {
        "number": "86",
        "name": "PA31",
        "type": "bidirectional",
        "description": "PIO line PA31, which is SSC RF (peripheral A) and TC0 TIOB2 (peripheral B)."
      },
      {
        "number": "87",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Powers the core, embedded memories and peripherals; voltage range 1.62-1.95 V."
      },
      {
        "number": "88",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Powers the peripheral I/O lines; voltage range 1.62-3.6 V."
      },
      {
        "number": "89",
        "name": "GND",
        "type": "power_in",
        "description": "Ground common to the VDDCORE and VDDIO power supplies."
      },
      {
        "number": "90",
        "name": "PB0",
        "type": "bidirectional",
        "description": "PIO line PB0; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "91",
        "name": "PB1",
        "type": "bidirectional",
        "description": "PIO line PB1; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "92",
        "name": "PB2",
        "type": "bidirectional",
        "description": "PIO line PB2; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "93",
        "name": "PB11",
        "type": "bidirectional",
        "description": "PIO line PB11; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "94",
        "name": "PB12",
        "type": "bidirectional",
        "description": "PIO line PB12; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "95",
        "name": "PB13",
        "type": "bidirectional",
        "description": "PIO line PB13; no peripheral function is listed in the provided excerpt."
      },
      {
        "number": "96",
        "name": "PA27",
        "type": "bidirectional",
        "description": "PIO line PA27, which is SSC RD (peripheral A)."
      },
      {
        "number": "97",
        "name": "PB5",
        "type": "bidirectional",
        "description": "PIO line PB5, which is TC0 TIOA1 (peripheral A); listed as an ADC analog input in the errata."
      },
      {
        "number": "98",
        "name": "PB6",
        "type": "bidirectional",
        "description": "PIO line PB6, which is TC0 TIOB1 (peripheral A); listed as an ADC analog input in the errata."
      },
      {
        "number": "99",
        "name": "PB7",
        "type": "bidirectional",
        "description": "PIO line PB7; listed as an ADC analog input in the errata."
      },
      {
        "number": "100",
        "name": "PB8",
        "type": "bidirectional",
        "description": "PIO line PB8; listed as an ADC analog input in the errata."
      }
    ],
    "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: Package body size 14x14 mm is not stated in the excerpt; the LQFP-100 mechanical drawing (Section 43; VBG has no function or electrical limits stated in the excerpt; its type is set to passive by assump; ERASE and NRSTB are only partially described; their detailed behavior is in Sections 6.6 and 6.7, wh",
          "42/100 pins cited to the wrong page (name found elsewhere): ['10:PA13/PGMD5@p597', '11:PA14/PGMD6@p597', '13:PA16/PGMD8@p597', '18:PA19/PGMD11@p597']"
        ],
        "pages_sent": 70,
        "cost_usd": 0.3967,
        "at": "2026-10-30T18:33:36"
      },
      "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": "atsam3u1cb-au.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16.0,
          16.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "51720097260ffba41c3062f85f67623721102fa535901c47cb555a1f444feeb3",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atsam3u1cb-au-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          16.0,
          16.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "498e4092bae9d4b2a42bbb57ca66950acb8cf0ae02fd0140df9ceb3ce717961d",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}