ADSP-21489KSWZ-4B

{
  "schema_version": 1,
  "type": "component",
  "slug": "adsp-21489kswz-4b",
  "title": "ADSP-21489KSWZ-4B",
  "brief": "Analog Devices Digital Signal Processors (DSP/DSC), LQFP-176-EP(24x24). 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",
    "adsp-21489kswz-4b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ADSP-21489KSWZ-4B",
    "manufacturer": "Analog Devices",
    "package": "LQFP-176-EP(24x24)",
    "pin_count": 177,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Digital Signal Processors (DSP/DSC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907277613486080",
    "parts": {
      "symbol": "adsp-21489kswz-4b.kicad_sym",
      "footprint": "adsp-21489kswz-4b.kicad_mod",
      "model_3d": "adsp-21489kswz-4b-etched.glb",
      "model_3d_plain": "adsp-21489kswz-4b.glb",
      "model_3d_step": "adsp-21489kswz-4b-etched.step",
      "model_3d_step_plain": "adsp-21489kswz-4b.step",
      "lbr": "adsp-21489kswz-4b.lbr"
    },
    "distributor_links": {
      "lcsc": "C514365",
      "digikey": "505-ADSP-21489KSWZ-4B-ND",
      "mouser": "584-ADSP21489KSWZ-4B"
    },
    "distributor_check": {
      "checked_at": "2026-10-01T17:29:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-ADSP-21489KSWZ-4B-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "584-ADSP21489KSWZ-4B",
        "status": "found",
        "lifecycle": "Restricted Availability"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SDDQM",
        "type": "tri_state",
        "description": "SDRAM DQM data mask; input mask during write cycles and output mask during read cycles; O/T (ipu); drives high after reset deassertion until SDRAM initialization completes, then goes low."
      },
      {
        "number": "2",
        "name": "MS0",
        "type": "tri_state",
        "description": "Memory select 0; active-low chip select for external memory bank 0; asserts simultaneously with address lines; O/T (ipu); hi-Z during reset."
      },
      {
        "number": "3",
        "name": "SDCKE",
        "type": "tri_state",
        "description": "SDRAM clock enable; connects to SDRAM CKE pin to enable/disable the SDCLK signal; O/T (ipu); drives high after reset deassertion."
      },
      {
        "number": "4",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "5",
        "name": "CLK_CFG1",
        "type": "input",
        "description": "Core-to-CLKIN ratio control bit 1; with CLK_CFG0 selects startup clock ratio (00=8:1, 01=32:1, 10=16:1, 11=reserved); must be valid before RESET deasserts."
      },
      {
        "number": "6",
        "name": "ADDR0",
        "type": "bidirectional",
        "description": "External address bit 0; I/O/T (ipu); multiplexed with FLAGS15-8 (I/O) and PWM (O); all ADDR pins default to external memory interface mode after reset."
      },
      {
        "number": "7",
        "name": "BOOT_CFG0",
        "type": "input",
        "description": "Boot configuration bit 0; with BOOT_CFG2-1 selects 176-pin boot mode per Table 9; must be valid before RESET asserts."
      },
      {
        "number": "8",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max; all VDD_EXT pins must connect to the same supply."
      },
      {
        "number": "9",
        "name": "ADDR1",
        "type": "bidirectional",
        "description": "External address bit 1; I/O/T (ipu); multiplexed with FLAGS15-8 and PWM."
      },
      {
        "number": "10",
        "name": "ADDR2",
        "type": "bidirectional",
        "description": "External address bit 2; I/O/T (ipu); multiplexed with FLAGS15-8 and PWM."
      },
      {
        "number": "11",
        "name": "ADDR3",
        "type": "bidirectional",
        "description": "External address bit 3; I/O/T (ipu); multiplexed with FLAGS15-8 and PWM."
      },
      {
        "number": "12",
        "name": "ADDR4",
        "type": "bidirectional",
        "description": "External address bit 4; I/O/T (ipu); multiplexed with FLAGS15-8 and PWM; IDP channel 0 scans ADDR23-4 for parallel (PDAP) input data when configured via IDP_PDAP_CTL."
      },
      {
        "number": "13",
        "name": "ADDR5",
        "type": "bidirectional",
        "description": "External address bit 5; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "14",
        "name": "BOOT_CFG1",
        "type": "input",
        "description": "Boot configuration bit 1; with BOOT_CFG2-0 selects 176-pin boot mode; must be valid before RESET asserts."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference."
      },
      {
        "number": "16",
        "name": "ADDR6",
        "type": "bidirectional",
        "description": "External address bit 6; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "17",
        "name": "ADDR7",
        "type": "bidirectional",
        "description": "External address bit 7; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "18",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "20",
        "name": "ADDR8",
        "type": "bidirectional",
        "description": "External address bit 8; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "21",
        "name": "ADDR9",
        "type": "bidirectional",
        "description": "External address bit 9; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "22",
        "name": "CLK_CFG0",
        "type": "input",
        "description": "Core-to-CLKIN ratio control bit 0; with CLK_CFG1 selects startup clock multiplier ratio; must be valid during reset."
      },
      {
        "number": "23",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "24",
        "name": "CLKIN",
        "type": "input",
        "description": "Local clock input; used with XTAL to enable the internal clock generator or accepts an external oscillator; must not be stopped or changed or run below rated frequency."
      },
      {
        "number": "25",
        "name": "XTAL",
        "type": "output",
        "description": "Crystal terminal; driven together with CLKIN to sustain an external fundamental-mode crystal oscillator; leave unconnected when using an external clock source."
      },
      {
        "number": "26",
        "name": "ADDR10",
        "type": "bidirectional",
        "description": "External address bit 10; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "27",
        "name": "SDA10",
        "type": "tri_state",
        "description": "SDRAM A10 auto-precharge pin; enables auto-precharge refresh during non-SDRAM accesses; replaces ADDR10 only during SDRAM access cycles; O/T (ipu)."
      },
      {
        "number": "28",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "29",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "30",
        "name": "ADDR11",
        "type": "bidirectional",
        "description": "External address bit 11; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "31",
        "name": "ADDR12",
        "type": "bidirectional",
        "description": "External address bit 12; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "32",
        "name": "ADDR17",
        "type": "bidirectional",
        "description": "External address bit 17; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "33",
        "name": "ADDR13",
        "type": "bidirectional",
        "description": "External address bit 13; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "34",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "35",
        "name": "ADDR18",
        "type": "bidirectional",
        "description": "External address bit 18; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "36",
        "name": "RESETOUT/RUNRSTIN",
        "type": "bidirectional",
        "description": "Reset output (default) or run-reset input; RUNRSTIN function enabled by setting bit 0 of RUNRSTCTL register; I/O (ipu); high-impedance default with internal pull-up."
      },
      {
        "number": "37",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "38",
        "name": "DPI_P01",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 1; physical interface to DPI SRU; routes SPI, UART, TWI, timers, PWM, flags, and PCG signals under software control; I/O/T (ipu)."
      },
      {
        "number": "39",
        "name": "DPI_P02",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 2; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "40",
        "name": "DPI_P03",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 3; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "41",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "42",
        "name": "DPI_P05",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 5; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "43",
        "name": "DPI_P04",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 4; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "44",
        "name": "DPI_P06",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 6; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "45",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "46",
        "name": "DPI_P08",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 8; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "47",
        "name": "DPI_P07",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 7; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "48",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "49",
        "name": "DPI_P09",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 9; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "50",
        "name": "DPI_P10",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 10; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "51",
        "name": "DPI_P11",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 11; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "52",
        "name": "DPI_P12",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 12; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "53",
        "name": "DPI_P13",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 13; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "54",
        "name": "DPI_P14",
        "type": "bidirectional",
        "description": "Digital Peripheral Interface pin 14; routes any DPI SRU signal to/from on-chip peripherals under software control; I/O/T (ipu)."
      },
      {
        "number": "55",
        "name": "DAI_P03",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 3; physical interface to DAI SRU; any DAI input or output (SPORT, PCG, S/PDIF, ASRC, IDP) may be routed here under software control; I/O/T (ipu)."
      },
      {
        "number": "56",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "57",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "58",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "59",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "60",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "61",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "62",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "63",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "64",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "65",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "66",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "67",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "68",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "69",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "70",
        "name": "WDTRSTO",
        "type": "output",
        "description": "Watchdog timer reset output; asserts low when watchdog timer expires to force the system into a known state; O (ipu); 176-pin package only."
      },
      {
        "number": "71",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "72",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "73",
        "name": "DAI_P07",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 7; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "74",
        "name": "DAI_P13",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 13; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "75",
        "name": "DAI_P19",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 19; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "76",
        "name": "DAI_P01",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 1; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "77",
        "name": "DAI_P02",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 2; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "78",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "79",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "80",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "81",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "82",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "83",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected."
      },
      {
        "number": "84",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "85",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "86",
        "name": "DAI_P06",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 6; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "87",
        "name": "DAI_P05",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 5; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "88",
        "name": "DAI_P09",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 9; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "89",
        "name": "DAI_P10",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 10; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "90",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "91",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "92",
        "name": "DAI_P20",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 20; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "93",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "94",
        "name": "DAI_P08",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 8; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "95",
        "name": "DAI_P14",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 14; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "96",
        "name": "DAI_P04",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 4; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "97",
        "name": "DAI_P18",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 18; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "98",
        "name": "DAI_P17",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 17; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "99",
        "name": "DAI_P16",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 16; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "100",
        "name": "DAI_P12",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 12; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "101",
        "name": "DAI_P15",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 15; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "102",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "103",
        "name": "DAI_P11",
        "type": "bidirectional",
        "description": "Digital Application Interface pin 11; routes any DAI SRU peripheral signal under software control; I/O/T (ipu)."
      },
      {
        "number": "104",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "105",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "106",
        "name": "BOOT_CFG2",
        "type": "input",
        "description": "Boot configuration bit 2; with BOOT_CFG1-0 selects 176-pin boot mode (000=SPI slave, 001=SPI master, 010=AMI/8-bit Flash, 011=no boot, 1xx=reserved); must be valid before RESET asserts."
      },
      {
        "number": "107",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "108",
        "name": "AMI_ACK",
        "type": "input",
        "description": "Asynchronous memory interface acknowledge; external device drives this pin low to insert wait states into an external memory access; I (ipu)."
      },
      {
        "number": "109",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference."
      },
      {
        "number": "110",
        "name": "THD_M",
        "type": "output",
        "description": "Thermal diode cathode (base of on-chip PNP BJT); connect to external temperature sensor such as ADM1021A; may be left floating when thermal monitoring is not used."
      },
      {
        "number": "111",
        "name": "THD_P",
        "type": "input",
        "description": "Thermal diode anode (emitter of on-chip PNP BJT); connect to external temperature sensor; may be left floating when thermal monitoring is not used."
      },
      {
        "number": "112",
        "name": "VDD_THD",
        "type": "power_in",
        "description": "Thermal diode power supply; 3.13 V min, 3.47 V max; may be left unconnected when thermal diode is not used."
      },
      {
        "number": "113",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "114",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "115",
        "name": "MS1",
        "type": "tri_state",
        "description": "Memory select 1; active-low chip select for external memory bank 1; also usable for EPORT/FLASH boot mode; O/T (ipu); hi-Z during reset."
      },
      {
        "number": "116",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "117",
        "name": "WDT_CLKO",
        "type": "output",
        "description": "Watchdog resonator pad output; paired with WDT_CLKIN to support an external watchdog timer clock crystal; 176-pin package only."
      },
      {
        "number": "118",
        "name": "WDT_CLKIN",
        "type": "input",
        "description": "Watchdog timer clock input; pull low when watchdog timer is not used; 176-pin package only; valid clock period 100 ns-1000 ns."
      },
      {
        "number": "119",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "120",
        "name": "ADDR23",
        "type": "bidirectional",
        "description": "External address bit 23; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data input when configured via IDP_PDAP_CTL."
      },
      {
        "number": "121",
        "name": "ADDR22",
        "type": "bidirectional",
        "description": "External address bit 22; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "122",
        "name": "ADDR21",
        "type": "bidirectional",
        "description": "External address bit 21; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "123",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "124",
        "name": "ADDR20",
        "type": "bidirectional",
        "description": "External address bit 20; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "125",
        "name": "ADDR19",
        "type": "bidirectional",
        "description": "External address bit 19; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "126",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "127",
        "name": "ADDR16",
        "type": "bidirectional",
        "description": "External address bit 16; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "128",
        "name": "ADDR15",
        "type": "bidirectional",
        "description": "External address bit 15; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "129",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "130",
        "name": "ADDR14",
        "type": "bidirectional",
        "description": "External address bit 14; I/O/T (ipu); multiplexed with FLAGS15-8, PWM, and PDAP parallel data."
      },
      {
        "number": "131",
        "name": "AMI_WR",
        "type": "tri_state",
        "description": "AMI port write enable; asserts (low) whenever the processor writes a word to external memory; O/T (ipu); hi-Z during reset."
      },
      {
        "number": "132",
        "name": "AMI_RD",
        "type": "tri_state",
        "description": "AMI port read enable; asserts (low) whenever the processor reads a word from external memory; O/T (ipu); hi-Z during reset."
      },
      {
        "number": "133",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "134",
        "name": "FLAG0",
        "type": "bidirectional",
        "description": "General-purpose flag 0 / interrupt request IRQ0; I/O (ipu); defaults to FLAG input after reset; output pulse width 2×tPCLK−3 ns."
      },
      {
        "number": "135",
        "name": "FLAG1",
        "type": "bidirectional",
        "description": "General-purpose flag 1 / interrupt request IRQ1; I/O (ipu); defaults to FLAG input after reset."
      },
      {
        "number": "136",
        "name": "FLAG2",
        "type": "bidirectional",
        "description": "General-purpose flag 2 / interrupt request IRQ2 / memory select MS2; I/O (ipu); defaults to FLAG input after reset."
      },
      {
        "number": "137",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (non-automotive variant; automotive variant uses MLBCLK at this position)."
      },
      {
        "number": "138",
        "name": "FLAG3",
        "type": "bidirectional",
        "description": "General-purpose flag 3 / core timer expiry TMREXP / memory select MS3; I/O (ipu); defaults to FLAG input after reset."
      },
      {
        "number": "139",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (non-automotive variant; automotive variant uses MLBDAT at this position)."
      },
      {
        "number": "140",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (non-automotive variant; automotive variant uses MLBDO at this position)."
      },
      {
        "number": "141",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "142",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (non-automotive variant; automotive variant uses MLBSIG at this position)."
      },
      {
        "number": "143",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "144",
        "name": "TRST",
        "type": "input",
        "description": "JTAG test reset; resets the TAP state machine; I (ipu); must be asserted (low) or held low after power-up for proper device operation; minimum pulse width 4×tCK."
      },
      {
        "number": "145",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (non-automotive variant; automotive variant uses MLBSO at this position)."
      },
      {
        "number": "146",
        "name": "EMU",
        "type": "output",
        "description": "Emulation status; open-drain output with internal pull-up; connect only to ADI DSP Tools JTAG emulator target board; hi-Z at reset."
      },
      {
        "number": "147",
        "name": "DATA0",
        "type": "bidirectional",
        "description": "External data bus bit 0; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "148",
        "name": "DATA1",
        "type": "bidirectional",
        "description": "External data bus bit 1; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "149",
        "name": "DATA2",
        "type": "bidirectional",
        "description": "External data bus bit 2; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "150",
        "name": "DATA3",
        "type": "bidirectional",
        "description": "External data bus bit 3; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "151",
        "name": "TDO",
        "type": "tri_state",
        "description": "JTAG test data output; serial scan output of the boundary-scan path; O/T; hi-Z at reset."
      },
      {
        "number": "152",
        "name": "DATA4",
        "type": "bidirectional",
        "description": "External data bus bit 4; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "153",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "154",
        "name": "DATA5",
        "type": "bidirectional",
        "description": "External data bus bit 5; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "155",
        "name": "DATA6",
        "type": "bidirectional",
        "description": "External data bus bit 6; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "156",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "157",
        "name": "DATA7",
        "type": "bidirectional",
        "description": "External data bus bit 7; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "158",
        "name": "TDI",
        "type": "input",
        "description": "JTAG test data input; provides serial data to the boundary-scan logic; I (ipu); internal pull-up resistor 26 kΩ-63 kΩ."
      },
      {
        "number": "159",
        "name": "SDCLK",
        "type": "tri_state",
        "description": "SDRAM clock output; uses a dedicated clock driver (Type B) different from all other drivers; O/T (ipd); driven after reset deassertion; can drive up to 30 pF distributed load."
      },
      {
        "number": "160",
        "name": "VDD_EXT",
        "type": "power_in",
        "description": "I/O power supply; 3.13 V min, 3.47 V max."
      },
      {
        "number": "161",
        "name": "DATA8",
        "type": "bidirectional",
        "description": "External data bus bit 8; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "162",
        "name": "DATA9",
        "type": "bidirectional",
        "description": "External data bus bit 9; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "163",
        "name": "DATA10",
        "type": "bidirectional",
        "description": "External data bus bit 10; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "164",
        "name": "TCK",
        "type": "input",
        "description": "JTAG test clock; clocks the boundary-scan TAP; must be driven low or held low after power-up; minimum period 20 ns."
      },
      {
        "number": "165",
        "name": "DATA11",
        "type": "bidirectional",
        "description": "External data bus bit 11; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "166",
        "name": "DATA12",
        "type": "bidirectional",
        "description": "External data bus bit 12; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "167",
        "name": "DATA14",
        "type": "bidirectional",
        "description": "External data bus bit 14; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "168",
        "name": "DATA13",
        "type": "bidirectional",
        "description": "External data bus bit 13; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "169",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "170",
        "name": "DATA15",
        "type": "bidirectional",
        "description": "External data bus bit 15; I/O/T (ipu); multiplexed with FLAGS7-0; hi-Z during reset."
      },
      {
        "number": "171",
        "name": "SDWE",
        "type": "tri_state",
        "description": "SDRAM write enable; connects to SDRAM WE pin; together with SDRAS/SDCAS/SDCKE defines the SDRAM command; O/T (ipu); drives high after reset deassertion."
      },
      {
        "number": "172",
        "name": "SDRAS",
        "type": "tri_state",
        "description": "SDRAM row address strobe; connects to SDRAM RAS pin; together with SDCAS/SDWE/SDCKE defines the SDRAM command; O/T (ipu); drives high after reset deassertion."
      },
      {
        "number": "173",
        "name": "RESET",
        "type": "input",
        "description": "Processor reset; active-low; resets the processor to a known state; must be asserted low at power-up; PLL lock delay of 4096 CLKIN cycles follows deassertion before core execution begins."
      },
      {
        "number": "174",
        "name": "TMS",
        "type": "input",
        "description": "JTAG test mode select; controls the TAP state machine; I (ipu); setup time 5 ns before TCK rising edge."
      },
      {
        "number": "175",
        "name": "SDCAS",
        "type": "tri_state",
        "description": "SDRAM column address strobe; connects to SDRAM CAS pin; together with SDRAS/SDWE/SDCKE defines the SDRAM command; O/T (ipu); drives high after reset deassertion."
      },
      {
        "number": "176",
        "name": "VDD_INT",
        "type": "power_in",
        "description": "Internal (core) power supply; 1.05 V min, 1.10 V nom, 1.15 V max."
      },
      {
        "number": "177",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed ground pad; must be soldered to a matching GND PCB pad connected to the board ground plane for optimal electrical and thermal performance."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-4-5-20251001",
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        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 177 (exposed GND pad) exists physically but is not numbered in the standard pinout sequence; it "
        ],
        "pages_sent": 68,
        "cost_usd": 1.1495,
        "at": "2026-10-01T17:27:04"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907277613486080",
        "pages": 68,
        "sha256": "7073853682aa6e48",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 177,
        "described": 177,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "LQFP-176-EP(24x24)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "177"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_pitch": "ADSP-21489KSWZ-4B (Analog Devices) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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