ATSAM4S4AA-MU

{
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  "type": "component",
  "slug": "atsam4s4aa-mu",
  "title": "ATSAM4S4AA-MU",
  "brief": "Microchip Tech Pre-ordered MCUs, QFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "ATSAM4S4AA-MU",
    "manufacturer": "Microchip Tech",
    "package": "QFN-48-EP(7x7)",
    "pin_count": 49,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d5551aa2e0d5163467403501353ff180.pdf",
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      "model_3d_step": "atsam4s4aa-mu-etched.step",
      "model_3d_step_plain": "atsam4s4aa-mu.step",
      "lbr": "atsam4s4aa-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C614454",
      "digikey": "ATSAM4S4AA-MU-ND",
      "mouser": "556-ATSAM4S4AA-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T20:33:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATSAM4S4AA-MU-ND",
        "status": "found",
        "lifecycle": "Active"
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      "mouser": {
        "pn": "556-ATSAM4S4AA-MU",
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    "pins": [
      {
        "number": "1",
        "name": "ADVREF",
        "type": "power_in",
        "description": "Reference voltage for the ADC, DAC and analog comparator."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "3",
        "name": "PB0/AD4",
        "type": "bidirectional",
        "description": "PIO line PB0 shared with ADC analog input AD4."
      },
      {
        "number": "4",
        "name": "PB1/AD5",
        "type": "bidirectional",
        "description": "PIO line PB1 shared with ADC analog input AD5."
      },
      {
        "number": "5",
        "name": "PB2/AD6",
        "type": "bidirectional",
        "description": "PIO line PB2 shared with ADC analog input AD6."
      },
      {
        "number": "6",
        "name": "PB3/AD7",
        "type": "bidirectional",
        "description": "PIO line PB3 shared with ADC analog input AD7."
      },
      {
        "number": "7",
        "name": "VDDIN",
        "type": "power_in",
        "description": "Voltage regulator input and ADC, DAC and analog comparator supply, 1.62 to 3.6 V."
      },
      {
        "number": "8",
        "name": "VDDOUT",
        "type": "power_out",
        "description": "Output of the internal voltage regulator."
      },
      {
        "number": "9",
        "name": "PA17/PGMD5/AD0",
        "type": "bidirectional",
        "description": "PIO line PA17 shared with FFPI data bit PGMD5 and ADC analog input AD0."
      },
      {
        "number": "10",
        "name": "PA18/PGMD6/AD1",
        "type": "bidirectional",
        "description": "PIO line PA18 shared with FFPI data bit PGMD6 and ADC analog input AD1."
      },
      {
        "number": "11",
        "name": "PA19/PGMD7/AD2",
        "type": "bidirectional",
        "description": "PIO line PA19 shared with FFPI data bit PGMD7 and ADC analog input AD2."
      },
      {
        "number": "12",
        "name": "PA20/AD3",
        "type": "bidirectional",
        "description": "PIO line PA20 shared with ADC analog input AD3."
      },
      {
        "number": "13",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Peripheral I/O lines supply, 1.62 to 3.6 V."
      },
      {
        "number": "14",
        "name": "PA16/PGMD4",
        "type": "bidirectional",
        "description": "PIO line PA16 shared with FFPI data bit PGMD4."
      },
      {
        "number": "15",
        "name": "PA15/PGMD3",
        "type": "bidirectional",
        "description": "PIO line PA15 shared with FFPI data bit PGMD3."
      },
      {
        "number": "16",
        "name": "PA14/PGMD2",
        "type": "bidirectional",
        "description": "PIO line PA14 shared with FFPI data bit PGMD2."
      },
      {
        "number": "17",
        "name": "PA13/PGMD1",
        "type": "bidirectional",
        "description": "PIO line PA13 shared with FFPI data bit PGMD1."
      },
      {
        "number": "18",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Core, first flash rail, embedded memories and peripherals supply, 1.08 to 1.32 V."
      },
      {
        "number": "19",
        "name": "PA12/PGMD0",
        "type": "bidirectional",
        "description": "PIO line PA12 shared with FFPI data bit PGMD0."
      },
      {
        "number": "20",
        "name": "PA11/PGMM3",
        "type": "bidirectional",
        "description": "PIO line PA11 shared with FFPI programming mode input PGMM3."
      },
      {
        "number": "21",
        "name": "PA10/PGMM2",
        "type": "bidirectional",
        "description": "PIO line PA10 shared with FFPI programming mode input PGMM2."
      },
      {
        "number": "22",
        "name": "PA9/PGMM1",
        "type": "bidirectional",
        "description": "PIO line PA9 shared with FFPI programming mode input PGMM1."
      },
      {
        "number": "23",
        "name": "PA8/XOUT32/PGMM0",
        "type": "bidirectional",
        "description": "PIO line PA8 shared with 32 kHz crystal output XOUT32 and FFPI programming mode input PGMM0."
      },
      {
        "number": "24",
        "name": "PA7/XIN32/PGMNVALID",
        "type": "bidirectional",
        "description": "PIO line PA7 shared with 32 kHz crystal input XIN32 and FFPI data direction output PGMNVALID."
      },
      {
        "number": "25",
        "name": "TDI/PB4",
        "type": "bidirectional",
        "description": "JTAG test data input shared with PIO line PB4; voltage must stay within -0.1 V to VDDIO+0.4 V per errata."
      },
      {
        "number": "26",
        "name": "PA6/PGMNOE",
        "type": "bidirectional",
        "description": "PIO line PA6 shared with FFPI programming read input PGMNOE."
      },
      {
        "number": "27",
        "name": "PA5/PGMRDY",
        "type": "bidirectional",
        "description": "PIO line PA5 shared with FFPI programming ready output PGMRDY."
      },
      {
        "number": "28",
        "name": "PA4/PGMNCMD",
        "type": "bidirectional",
        "description": "PIO line PA4 shared with FFPI programming command input PGMNCMD."
      },
      {
        "number": "29",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Active-low microcontroller reset, input/output."
      },
      {
        "number": "30",
        "name": "TST",
        "type": "input",
        "description": "Test select; low at power-up gives normal operation, high gives test or FFPI mode, with an internal pull-down of about 15 kΩ."
      },
      {
        "number": "31",
        "name": "PA3",
        "type": "bidirectional",
        "description": "PIO line PA3."
      },
      {
        "number": "32",
        "name": "PA2/PGMEN2",
        "type": "bidirectional",
        "description": "PIO line PA2 shared with FFPI programming enable input PGMEN2."
      },
      {
        "number": "33",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Peripheral I/O lines supply, 1.62 to 3.6 V."
      },
      {
        "number": "34",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "35",
        "name": "PA1/PGMEN1",
        "type": "bidirectional",
        "description": "PIO line PA1 shared with FFPI programming enable input PGMEN1."
      },
      {
        "number": "36",
        "name": "PA0/PGMEN0",
        "type": "bidirectional",
        "description": "PIO line PA0 shared with FFPI programming enable input PGMEN0."
      },
      {
        "number": "37",
        "name": "TDO/TRACESWO/PB5",
        "type": "output",
        "description": "JTAG test data out or asynchronous trace output TRACESWO (SW-DP only), shared with PIO line PB5."
      },
      {
        "number": "38",
        "name": "JTAGSEL",
        "type": "input",
        "description": "Active-high JTAG selection input; a chip reset is required after it changes."
      },
      {
        "number": "39",
        "name": "TMS/SWDIO/PB6",
        "type": "bidirectional",
        "description": "JTAG test mode select or serial wire data I/O, shared with PIO line PB6."
      },
      {
        "number": "40",
        "name": "TCK/SWCLK/PB7",
        "type": "input",
        "description": "JTAG test clock or serial wire clock, shared with PIO line PB7."
      },
      {
        "number": "41",
        "name": "VDDCORE",
        "type": "power_in",
        "description": "Core, first flash rail, embedded memories and peripherals supply, 1.08 to 1.32 V."
      },
      {
        "number": "42",
        "name": "ERASE/PB12",
        "type": "bidirectional",
        "description": "Flash erase input shared with PIO line PB12."
      },
      {
        "number": "43",
        "name": "DDM/PB10",
        "type": "bidirectional",
        "description": "USB full-speed data minus shared with PIO line PB10."
      },
      {
        "number": "44",
        "name": "DDP/PB11",
        "type": "bidirectional",
        "description": "USB full-speed data plus shared with PIO line PB11."
      },
      {
        "number": "45",
        "name": "XOUT/PB8",
        "type": "bidirectional",
        "description": "3 to 20 MHz oscillator output shared with PIO line PB8."
      },
      {
        "number": "46",
        "name": "XIN/PB9/PGMCK",
        "type": "bidirectional",
        "description": "3 to 20 MHz oscillator input shared with PIO line PB9 and FFPI programming clock PGMCK."
      },
      {
        "number": "47",
        "name": "VDDIO",
        "type": "power_in",
        "description": "Peripheral I/O lines supply, 1.62 to 3.6 V."
      },
      {
        "number": "48",
        "name": "VDDPLL",
        "type": "power_in",
        "description": "Supply for PLLA, PLLB, fast RC and 3 to 20 MHz oscillator, 1.08 to 1.32 V."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "primary_model": "claude-sonnet-5-5",
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet says the QFN bottom pad must be connected to ground but gives it no pin number, so no ; The datasheet does not describe VDDOUT or give its type. 'power_out' and the description are inferre; The pin-type classes for TMS/SWDIO (bidirectional), the debug pins and the oscillator PIO pins were ",
          "6/49 pins cited to the wrong page (name found elsewhere): ['29:NRST@p269', '30:TST@p270', '37:TDO/TRACESWO/PB5@p269', '38:JTAGSEL@p269']"
        ],
        "pages_sent": 82,
        "cost_usd": 0.7545,
        "at": "2026-10-30T20:33:44"
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        "pages": 1269,
        "sha256": "64941c58dfa3899c",
        "source_tier": "mfr"
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        "total": 49,
        "described": 49,
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        "refuses_to_fabricate": true
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-48-EP(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "49"
    },
    "appearance": {
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        "quote": "before performing the calculation, making the base address for the calculation word-aligned. ̶ Note: To generate the address of an instruction, the constant based on the value of the PC must be",
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        "material": "PC"
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          "name": "Operating temperature range (ATSAM4S4AA-MU, MRL A, Industrial)",
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          "max": 85,
          "conditions": "Industrial (-40°C to +85°C)",
          "source_page": 1221,
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    "name": "Ray",
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