seveibar/am3352-dev-board

A 324-ball TI AM3352 ARM processor with DDR3, LCD, USB, Ethernet, storage, serial, analog, clock, reset, power, and JTAG interfaces, paired with configurable JST-GH board connectors and constrained PCB routing.
Version: 1.0.2
License: unset
Stars: 0
design/ddr-via-sensitivity.json

{
  "circuitSha256": "8d59215bb549d92980a490503cea35851e98dfd8d36fde491ebdf81b3529f9ab",
  "method": "Sensitivity only: equally spaced copper planes across 1.2 mm; for each two-via byte path on top plus one other layer add 2 * layer index * 1.2 / 7 mm. Not a specified fabrication stackup or electrical-delay simulation.",
  "groups": [
    {
      "byte": 0,
      "shortest": "DDR_DQS0",
      "longest": "DDR_D3",
      "illustrativeSkewMm": 1.7436767142857121,
      "limitMm": 0.635,
      "nets": {
        "DDR_D0": {
          "layer": "inner2",
          "planarMm": 18.499992,
          "illustrativeTotalMm": 19.185706285714286
        },
        "DDR_D1": {
          "layer": "inner3",
          "planarMm": 18.499967,
          "illustrativeTotalMm": 19.52853842857143
        },
        "DDR_D2": {
          "layer": "bottom",
          "planarMm": 18.470563,
          "illustrativeTotalMm": 20.870562999999997
        },
        "DDR_D3": {
          "layer": "bottom",
          "planarMm": 18.520671,
          "illustrativeTotalMm": 20.920671
        },
        "DDR_D4": {
          "layer": "inner3",
          "planarMm": 18.5,
          "illustrativeTotalMm": 19.52857142857143
        },
        "DDR_D5": {
          "layer": "inner5",
          "planarMm": 18.470679,
          "illustrativeTotalMm": 20.184964714285716
        },
        "DDR_D6": {
          "layer": "inner4",
          "planarMm": 18.5,
          "illustrativeTotalMm": 19.87142857142857
        },
        "DDR_D7": {
          "layer": "inner5",
          "planarMm": 18.52071,
          "illustrativeTotalMm": 20.234995714285716
        },
        "DDR_DQM0": {
          "layer": "inner4",
          "planarMm": 18.499992,
          "illustrativeTotalMm": 19.87142057142857
        },
        "DDR_DQS0": {
          "layer": "inner2",
          "planarMm": 18.49128,
          "illustrativeTotalMm": 19.176994285714287
        },
        "DDR_DQSn0": {
          "layer": "inner2",
          "planarMm": 18.5,
          "illustrativeTotalMm": 19.185714285714287
        }
      }
    },
    {
      "byte": 1,
      "shortest": "DDR_DQS1",
      "longest": "DDR_D10",
      "illustrativeSkewMm": 1.0785684285714279,
      "limitMm": 0.635,
      "nets": {
        "DDR_D8": {
          "layer": "inner2",
          "planarMm": 12.09997,
          "illustrativeTotalMm": 12.785684285714286
        },
        "DDR_D9": {
          "layer": "inner3",
          "planarMm": 12.099961,
          "illustrativeTotalMm": 13.128532428571429
        },
        "DDR_D10": {
          "layer": "inner5",
          "planarMm": 12.120695,
          "illustrativeTotalMm": 13.834980714285713
        },
        "DDR_D11": {
          "layer": "inner5",
          "planarMm": 12.070717,
          "illustrativeTotalMm": 13.785002714285714
        },
        "DDR_D12": {
          "layer": "inner5",
          "planarMm": 12.1,
          "illustrativeTotalMm": 13.814285714285713
        },
        "DDR_D13": {
          "layer": "inner3",
          "planarMm": 12.070722,
          "illustrativeTotalMm": 13.099293428571428
        },
        "DDR_D14": {
          "layer": "inner5",
          "planarMm": 12.070726,
          "illustrativeTotalMm": 13.785011714285714
        },
        "DDR_D15": {
          "layer": "inner4",
          "planarMm": 12.070679,
          "illustrativeTotalMm": 13.442107571428572
        },
        "DDR_DQM1": {
          "layer": "inner2",
          "planarMm": 12.07071,
          "illustrativeTotalMm": 12.756424285714285
        },
        "DDR_DQS1": {
          "layer": "inner2",
          "planarMm": 12.070698,
          "illustrativeTotalMm": 12.756412285714285
        },
        "DDR_DQSn1": {
          "layer": "inner2",
          "planarMm": 12.099972,
          "illustrativeTotalMm": 12.785686285714284
        }
      }
    }
  ]
}