DM9000CEP

{
  "schema_version": 1,
  "type": "component",
  "slug": "dm9000cep",
  "title": "DM9000CEP",
  "brief": "DAVICOM Ethernet Controllers, LQFP-48(7x7). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "dm9000cep"
  ],
  "component": {
    "mpn": "DM9000CEP",
    "manufacturer": "DAVICOM",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "Interface",
    "subcategory": "Ethernet Controllers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183869435822080",
    "parts": {
      "symbol": "dm9000cep.kicad_sym",
      "footprint": "dm9000cep.kicad_mod",
      "model_3d": "dm9000cep-etched.glb",
      "model_3d_plain": "dm9000cep.glb",
      "model_3d_step": "dm9000cep-etched.step",
      "model_3d_step_plain": "dm9000cep.step",
      "lbr": "dm9000cep.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "BGRES",
        "type": "passive",
        "description": "Band-gap reference pin; connect an external precision resistor to set the internal band-gap current bias."
      },
      {
        "number": "2",
        "name": "RXVDD18",
        "type": "power_out",
        "description": "1.8 V regulator output for the TP receive analog block. Decouple locally; do not drive from an external supply."
      },
      {
        "number": "3",
        "name": "RX+",
        "type": "bidirectional",
        "description": "10/100BASE-T twisted-pair receive positive in MDI mode, or transmit positive in MDIX mode."
      },
      {
        "number": "4",
        "name": "RX-",
        "type": "bidirectional",
        "description": "10/100BASE-T twisted-pair receive negative in MDI mode, or transmit negative in MDIX mode."
      },
      {
        "number": "5",
        "name": "RXGND",
        "type": "power_in",
        "description": "Analog ground for the RX/receive PHY block."
      },
      {
        "number": "6",
        "name": "TXGND",
        "type": "power_in",
        "description": "Analog ground for the TX/transmit PHY block."
      },
      {
        "number": "7",
        "name": "TX+",
        "type": "bidirectional",
        "description": "10/100BASE-T twisted-pair transmit positive in MDI mode, or receive positive in MDIX mode."
      },
      {
        "number": "8",
        "name": "TX-",
        "type": "bidirectional",
        "description": "10/100BASE-T twisted-pair transmit negative in MDI mode, or receive negative in MDIX mode."
      },
      {
        "number": "9",
        "name": "TXVDD18",
        "type": "power_out",
        "description": "1.8 V regulator output for the TP transmit analog block. Decouple locally; do not drive externally."
      },
      {
        "number": "10",
        "name": "SD7",
        "type": "bidirectional",
        "description": "Processor data bus bit 7 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "11",
        "name": "SD6",
        "type": "bidirectional",
        "description": "Processor data bus bit 6 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "12",
        "name": "SD5",
        "type": "bidirectional",
        "description": "Processor data bus bit 5 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "13",
        "name": "SD4",
        "type": "bidirectional",
        "description": "Processor data bus bit 4 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "14",
        "name": "SD3",
        "type": "bidirectional",
        "description": "Processor data bus bit 3 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "16",
        "name": "SD2",
        "type": "bidirectional",
        "description": "Processor data bus bit 2 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "17",
        "name": "SD1",
        "type": "bidirectional",
        "description": "Processor data bus bit 1 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "18",
        "name": "SD0",
        "type": "bidirectional",
        "description": "Processor data bus bit 0 (host interface). Internal pull-down ~60 kΩ."
      },
      {
        "number": "19",
        "name": "EEDIO",
        "type": "bidirectional",
        "description": "Serial data I/O for the external 93C46-style EEPROM. Internal pull-down ~60 kΩ."
      },
      {
        "number": "20",
        "name": "EECK",
        "type": "output",
        "description": "Serial clock to the external EEPROM. Also latched at power-on reset as a strap: pull-high → INT active-low, floating → INT active-high."
      },
      {
        "number": "21",
        "name": "EECS",
        "type": "output",
        "description": "Chip-select to the external EEPROM. Also latched at power-on reset as a strap: pull-high → 8-bit host bus, floating → 16-bit host bus."
      },
      {
        "number": "22",
        "name": "SD15/WAKE",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 15. 8-bit mode: WAKE output - pulses on a wake-up event. Also latched at reset as a strap for CS# polarity in 8-bit mode (pull-high → CS# active-high, float → CS# active-low)."
      },
      {
        "number": "23",
        "name": "VDD",
        "type": "power_in",
        "description": "3.3 V digital supply input."
      },
      {
        "number": "24",
        "name": "SD14/LED3",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 14. 8-bit mode: LED3 full-duplex LED output (open-drain low when internal PHY is full-duplex; LED mode is set in EEPROM)."
      },
      {
        "number": "25",
        "name": "SD13/GP6",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 13. 8-bit mode: GP6 general-purpose output (register 1Fh); also acts at reset as a strap defining INT output type (pull-high → open-drain, float → force/push-pull)."
      },
      {
        "number": "26",
        "name": "SD12/GP5",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 12. 8-bit mode: GP5 general-purpose output driven by register 1Fh."
      },
      {
        "number": "27",
        "name": "SD11/GP4",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 11. 8-bit mode: GP4 general-purpose output driven by register 1Fh."
      },
      {
        "number": "28",
        "name": "SD10/GP3",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 10. 8-bit mode: GP3 general-purpose I/O (registers GPCR/GPR); default is input."
      },
      {
        "number": "29",
        "name": "SD9/GP2",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 9. 8-bit mode: GP2 general-purpose I/O (registers GPCR/GPR); default is input."
      },
      {
        "number": "30",
        "name": "VDD",
        "type": "power_in",
        "description": "3.3 V digital supply input."
      },
      {
        "number": "31",
        "name": "SD8/GP1",
        "type": "bidirectional",
        "description": "16-bit mode: processor data bus bit 8. 8-bit mode: GP1 general-purpose I/O (registers GPCR/GPR); default is input."
      },
      {
        "number": "32",
        "name": "CMD",
        "type": "input",
        "description": "Command type: high selects the DATA port for the current cycle, low selects the INDEX (address) port. Internal pull-down ~60 kΩ."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "34",
        "name": "INT",
        "type": "output",
        "description": "Interrupt request to the host. High-active by default; polarity may be flipped by EEPROM setting or by the EECK strap. Internal pull-down ~60 kΩ."
      },
      {
        "number": "35",
        "name": "IOR#",
        "type": "input",
        "description": "Processor read strobe. Low-active by default; polarity configurable via EEPROM. Internal pull-down ~60 kΩ."
      },
      {
        "number": "36",
        "name": "IOW#",
        "type": "input",
        "description": "Processor write strobe. Low-active by default; polarity configurable via EEPROM. Internal pull-down ~60 kΩ."
      },
      {
        "number": "37",
        "name": "CS#",
        "type": "input",
        "description": "Chip-select to the DM9000C/CI host interface. Low-active by default; polarity configurable via EEPROM (and by the WAKE strap in 8-bit mode). Internal pull-down ~60 kΩ."
      },
      {
        "number": "38",
        "name": "LED2",
        "type": "bidirectional",
        "description": "Link/Activity LED for the internal PHY (behavior depends on LED mode set in EEPROM word 7). Function is disabled when the pin is repurposed for the WOL output."
      },
      {
        "number": "39",
        "name": "LED1",
        "type": "bidirectional",
        "description": "Speed LED for the internal PHY: low drive indicates 100 Mb/s; floats in 10 Mb/s mode."
      },
      {
        "number": "40",
        "name": "PWRST#",
        "type": "input",
        "description": "Active-low power-on reset. The DM9000C/CI is ready ~5 µs after this pin is deasserted."
      },
      {
        "number": "41",
        "name": "TEST",
        "type": "input",
        "description": "Operation-mode/test pin. Tie to ground in normal application."
      },
      {
        "number": "42",
        "name": "VDD",
        "type": "power_in",
        "description": "3.3 V digital supply input."
      },
      {
        "number": "43",
        "name": "X2",
        "type": "output",
        "description": "25 MHz crystal oscillator output (connect to one leg of the crystal, or leave floating if X1 is driven by an external clock)."
      },
      {
        "number": "44",
        "name": "X1",
        "type": "input",
        "description": "25 MHz crystal oscillator input."
      },
      {
        "number": "45",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "46",
        "name": "SD",
        "type": "input",
        "description": "Fiber-optic Signal Detect (PECL input). Indicates whether the fiber-optic receive pair is receiving valid levels; tie appropriately when unused."
      },
      {
        "number": "47",
        "name": "RXGND",
        "type": "power_in",
        "description": "Analog ground for the RX/receive PHY block (second RXGND pin)."
      },
      {
        "number": "48",
        "name": "BGGND",
        "type": "power_in",
        "description": "Band-gap analog ground return."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183869435822080",
        "pages": 63,
        "sha256": "ee55ca9f9a5216f5",
        "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": "dm9000cep.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "dm9000cep-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": "17aad4be1203b4bbc812a7eace83dd988763777cfc81f07418a19109c072bb7e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "DAVICOM",
      "Package": "LQFP-48(7x7)",
      "Category": "Interface",
      "Pins": "48"
    }
  },
  "variants": [
    {
      "mpn": "DM9000CEP",
      "kind": "packaging"
    },
    {
      "mpn": "DM9000CEPCIEP",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "dm9000cep"
  ],
  "discovery_pitch": "DM9000CEP (DAVICOM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "dm9000cep.kicad_sym",
    "dm9000cep.kicad_mod",
    "dm9000cep.glb",
    "dm9000cep.step",
    "dm9000cep.lbr",
    "docs/hero.png",
    "docs/dm9000cep-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T19:48:30.062Z"
}