ATMEGA1284P-MU

{
  "slug": "atmega1284p-mu",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech MICROCHIP, VQFN-44-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "atmega1284p-mu",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "atmega1284p-mu.kicad_sym",
    "atmega1284p-mu.kicad_mod",
    "atmega1284p-mu.glb",
    "atmega1284p-mu.step",
    "atmega1284p-mu.lbr",
    "docs/hero.png",
    "docs/atmega1284p-mu-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "atmega1284p-mu-hero.glb",
    "atmega1284p-mu-hero.overlay.json",
    "atmega1284p-mu-etched.glb"
  ],
  "component": {
    "mpn": "ATMEGA1284P-MU",
    "manufacturer": "Microchip Tech",
    "package": "VQFN-44-EP(7x7)",
    "pin_count": 45,
    "category": "Embedded Processors & Controllers",
    "subcategory": "MICROCHIP",
    "datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ProductDocuments/DataSheets/ATmega164A_PA-324A_PA-644A_PA-1284_P_Data-Sheet-40002070B.pdf",
    "parts": {
      "symbol": "atmega1284p-mu.kicad_sym",
      "footprint": "atmega1284p-mu.kicad_mod",
      "model_3d": "atmega1284p-mu-hero.glb",
      "model_3d_plain": "atmega1284p-mu-etched.glb",
      "model_3d_step": "atmega1284p-mu-etched.step",
      "model_3d_step_plain": "atmega1284p-mu.step",
      "lbr": "atmega1284p-mu.lbr"
    },
    "distributor_links": {
      "lcsc": "C1337217",
      "digikey": "ATMEGA1284P-MU-ND",
      "mouser": "556-ATMEGA1284P-MU"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T03:34:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ATMEGA1284P-MU-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "556-ATMEGA1284P-MU",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PB5",
        "type": "bidirectional",
        "description": "Port B bit 5 8-bit bidirectional I/O with pull-up; alternate functions MOSI (SPI), ICP3 (Timer/Counter3 input capture), PCINT13."
      },
      {
        "number": "2",
        "name": "PB6",
        "type": "bidirectional",
        "description": "Port B bit 6 bidirectional I/O with pull-up; alternate functions MISO (SPI), OC3A (Timer/Counter3 output compare A), PCINT14."
      },
      {
        "number": "3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "Port B bit 7 bidirectional I/O with pull-up; alternate functions SCK (SPI clock), OC3B (Timer/Counter3 output compare B), PCINT15."
      },
      {
        "number": "4",
        "name": "RESET",
        "type": "input",
        "description": "Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "7",
        "name": "XTAL2",
        "type": "output",
        "description": "Output from the inverting oscillator amplifier."
      },
      {
        "number": "8",
        "name": "XTAL1",
        "type": "input",
        "description": "Input to the inverting oscillator amplifier and input to the internal clock operating circuit."
      },
      {
        "number": "9",
        "name": "PD0",
        "type": "bidirectional",
        "description": "Port D bit 0 bidirectional I/O with pull-up; alternate functions RXD0 (USART0 receive), T3 (Timer/Counter3 external clock, ATmega1284/1284P only), PCINT24."
      },
      {
        "number": "10",
        "name": "PD1",
        "type": "bidirectional",
        "description": "Port D bit 1 bidirectional I/O with pull-up; alternate functions TXD0 (USART0 transmit), PCINT25."
      },
      {
        "number": "11",
        "name": "PD2",
        "type": "bidirectional",
        "description": "Port D bit 2 bidirectional I/O with pull-up; alternate functions RXD1 (USART1 receive), INT0 (external interrupt 0), PCINT26."
      },
      {
        "number": "12",
        "name": "PD3",
        "type": "bidirectional",
        "description": "Port D bit 3 bidirectional I/O with pull-up; alternate functions TXD1 (USART1 transmit), INT1 (external interrupt 1), PCINT27."
      },
      {
        "number": "13",
        "name": "PD4",
        "type": "bidirectional",
        "description": "Port D bit 4 bidirectional I/O with pull-up; alternate functions XCK1 (USART1 external clock), OC1B (Timer/Counter1 output compare B), PCINT28."
      },
      {
        "number": "14",
        "name": "PD5",
        "type": "bidirectional",
        "description": "Port D bit 5 bidirectional I/O with pull-up; alternate functions OC1A (Timer/Counter1 output compare A), PCINT29."
      },
      {
        "number": "15",
        "name": "PD6",
        "type": "bidirectional",
        "description": "Port D bit 6 bidirectional I/O with pull-up; alternate functions OC2B (Timer/Counter2 output compare B), ICP1 (Timer/Counter1 input capture), PCINT30."
      },
      {
        "number": "16",
        "name": "PD7",
        "type": "bidirectional",
        "description": "Port D bit 7 bidirectional I/O with pull-up; alternate functions OC2A (Timer/Counter2 output compare A), PCINT31."
      },
      {
        "number": "17",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "19",
        "name": "PC0",
        "type": "bidirectional",
        "description": "Port C bit 0 bidirectional I/O with pull-up; alternate functions SCL (two-wire serial interface clock), PCINT16."
      },
      {
        "number": "20",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Port C bit 1 bidirectional I/O with pull-up; alternate functions SDA (two-wire serial interface data), PCINT17."
      },
      {
        "number": "21",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Port C bit 2 bidirectional I/O with pull-up; alternate functions TCK (JTAG test clock), PCINT18."
      },
      {
        "number": "22",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Port C bit 3 bidirectional I/O with pull-up; alternate functions TMS (JTAG test mode select), PCINT19."
      },
      {
        "number": "23",
        "name": "PC4",
        "type": "bidirectional",
        "description": "Port C bit 4 bidirectional I/O with pull-up; alternate functions TDO (JTAG test data out), PCINT20."
      },
      {
        "number": "24",
        "name": "PC5",
        "type": "bidirectional",
        "description": "Port C bit 5 bidirectional I/O with pull-up; alternate functions TDI (JTAG test data in), PCINT21."
      },
      {
        "number": "25",
        "name": "PC6",
        "type": "bidirectional",
        "description": "Port C bit 6 bidirectional I/O with pull-up; alternate functions TOSC1 (Timer/Counter2 oscillator input), PCINT22."
      },
      {
        "number": "26",
        "name": "PC7",
        "type": "bidirectional",
        "description": "Port C bit 7 bidirectional I/O with pull-up; alternate functions TOSC2 (Timer/Counter2 oscillator output), PCINT23."
      },
      {
        "number": "27",
        "name": "AVCC",
        "type": "power_in",
        "description": "Supply voltage for Port A and the ADC; must be connected to VCC even if the ADC is not used, through a low-pass filter if the ADC is used."
      },
      {
        "number": "28",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "29",
        "name": "AREF",
        "type": "input",
        "description": "Analog reference pin for the analog-to-digital converter."
      },
      {
        "number": "30",
        "name": "PA7",
        "type": "bidirectional",
        "description": "Port A bit 7 bidirectional I/O with pull-up; ADC7 analog input, PCINT7."
      },
      {
        "number": "31",
        "name": "PA6",
        "type": "bidirectional",
        "description": "Port A bit 6 bidirectional I/O with pull-up; ADC6 analog input, PCINT6."
      },
      {
        "number": "32",
        "name": "PA5",
        "type": "bidirectional",
        "description": "Port A bit 5 bidirectional I/O with pull-up; ADC5 analog input, PCINT5."
      },
      {
        "number": "33",
        "name": "PA4",
        "type": "bidirectional",
        "description": "Port A bit 4 bidirectional I/O with pull-up; ADC4 analog input, PCINT4."
      },
      {
        "number": "34",
        "name": "PA3",
        "type": "bidirectional",
        "description": "Port A bit 3 bidirectional I/O with pull-up; ADC3 analog input, PCINT3."
      },
      {
        "number": "35",
        "name": "PA2",
        "type": "bidirectional",
        "description": "Port A bit 2 bidirectional I/O with pull-up; ADC2 analog input, PCINT2."
      },
      {
        "number": "36",
        "name": "PA1",
        "type": "bidirectional",
        "description": "Port A bit 1 bidirectional I/O with pull-up; ADC1 analog input, PCINT1."
      },
      {
        "number": "37",
        "name": "PA0",
        "type": "bidirectional",
        "description": "Port A bit 0 bidirectional I/O with pull-up; ADC0 analog input, PCINT0."
      },
      {
        "number": "38",
        "name": "VCC",
        "type": "power_in",
        "description": "Digital supply voltage."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "40",
        "name": "PB0",
        "type": "bidirectional",
        "description": "Port B bit 0 bidirectional I/O with pull-up; alternate functions XCK0 (USART0 external clock), T0 (Timer/Counter0 external input), PCINT8."
      },
      {
        "number": "41",
        "name": "PB1",
        "type": "bidirectional",
        "description": "Port B bit 1 bidirectional I/O with pull-up; alternate functions T1 (Timer/Counter1 external input), CLKO (divided system clock output), PCINT9."
      },
      {
        "number": "42",
        "name": "PB2",
        "type": "bidirectional",
        "description": "Port B bit 2 bidirectional I/O with pull-up; alternate functions AIN0 (analog comparator positive input), INT2 (external interrupt 2), PCINT10."
      },
      {
        "number": "43",
        "name": "PB3",
        "type": "bidirectional",
        "description": "Port B bit 3 bidirectional I/O with pull-up; alternate functions AIN1 (analog comparator negative input), OC0A (Timer/Counter0 output compare A), PCINT11."
      },
      {
        "number": "44",
        "name": "PB4",
        "type": "bidirectional",
        "description": "Port B bit 4 bidirectional I/O with pull-up; alternate functions SS (SPI slave select), OC0B (Timer/Counter0 output compare B), PCINT12."
      },
      {
        "number": "45",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet text does not print pin numbers for the 44-pad VQFN. Figure 1-1 gives only the names. ; The exposed pad has no printed pin number in the datasheet. 'EP' is a placeholder. The datasheet onl; The datasheet lists the 44-lead package as 44M1, but the packaging section of this text shows a 44M1",
          "23/45 pins cited to the wrong page (name found elsewhere): ['7:XTAL2@p16', '8:XTAL1@p16', '9:PD0@p94', '15:PD6@p94']"
        ],
        "pages_sent": 115,
        "cost_usd": 1.0456,
        "at": "2026-10-23T03:33:50"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ProductDocuments/DataSheets/ATmega164A_PA-324A_PA-644A_PA-1284_P_Data-Sheet-40002070B.pdf",
        "pages": 672,
        "sha256": "b5ee49362803dc70",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 45,
        "described": 45,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "atmega1284p-mu.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e095902326bdaee7dcc9926c9d1613852bfa37bad68a82560157ca7fe509925a",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "atmega1284p-mu-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b3457765cca4266604293640ab4a48583c4780949fb9a31d45ee2024c1b0c36a",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}