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-skew-check.json
{
"circuitSha256": "8d59215bb549d92980a490503cea35851e98dfd8d36fde491ebdf81b3529f9ab",
"method": "Shortest processor-ball-center to RAM-ball-center path through saved routed centerlines. Via transitions have zero planar length. Excludes vertical via length, package delay and layer-dependent propagation. For this single-device point-to-point topology the complete address/control paths are matched within 0.635 mm. Nominal lengths use the maximum actual pin-pair Manhattan distance; no cross-net bounding-box allowance is assumed.",
"source": "https://www.ti.com/lit/ds/symlink/am3352.pdf",
"groups": [
{
"group": "Byte 0: DQ + DM",
"skewMm": 0.050147,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D2",
"longest": "DDR_D7",
"nets": [
"DDR_D0",
"DDR_D1",
"DDR_D2",
"DDR_D3",
"DDR_D4",
"DDR_D5",
"DDR_D6",
"DDR_D7",
"DDR_DQM0"
]
},
{
"group": "Byte 0: DQ + DM + DQS envelope",
"skewMm": 0.050147,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D2",
"longest": "DDR_D7",
"nets": [
"DDR_D0",
"DDR_D1",
"DDR_D2",
"DDR_D3",
"DDR_D4",
"DDR_D5",
"DDR_D6",
"DDR_D7",
"DDR_DQM0",
"DDR_DQS0",
"DDR_DQSn0"
]
},
{
"group": "DQS0 differential pair",
"skewMm": 0.00872,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_DQS0",
"longest": "DDR_DQSn0",
"nets": [
"DDR_DQS0",
"DDR_DQSn0"
]
},
{
"group": "Byte 1: DQ + DM",
"skewMm": 0.050016,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D15",
"longest": "DDR_D10",
"nets": [
"DDR_D8",
"DDR_D9",
"DDR_D10",
"DDR_D11",
"DDR_D12",
"DDR_D13",
"DDR_D14",
"DDR_D15",
"DDR_DQM1"
]
},
{
"group": "Byte 1: DQ + DM + DQS envelope",
"skewMm": 0.050016,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D15",
"longest": "DDR_D10",
"nets": [
"DDR_D8",
"DDR_D9",
"DDR_D10",
"DDR_D11",
"DDR_D12",
"DDR_D13",
"DDR_D14",
"DDR_D15",
"DDR_DQM1",
"DDR_DQS1",
"DDR_DQSn1"
]
},
{
"group": "DQS1 differential pair",
"skewMm": 0.029274,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_DQS1",
"longest": "DDR_DQSn1",
"nets": [
"DDR_DQS1",
"DDR_DQSn1"
]
},
{
"group": "CK differential pair",
"skewMm": 0.020684,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_CK",
"longest": "DDR_CKn",
"nets": [
"DDR_CK",
"DDR_CKn"
]
},
{
"group": "Address/control + CK envelope",
"skewMm": 0.050012,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_ODT",
"longest": "DDR_BA0",
"nets": [
"DDR_A6",
"DDR_BA0",
"DDR_A8",
"DDR_A2",
"DDR_A10",
"DDR_BA2",
"DDR_A3",
"DDR_A12",
"DDR_A0",
"DDR_WEn",
"DDR_A4",
"DDR_A7",
"DDR_A11",
"DDR_A5",
"DDR_A9",
"DDR_BA1",
"DDR_CASn",
"DDR_RASn",
"DDR_CKE",
"DDR_CSn0",
"DDR_ODT",
"DDR_A1",
"DDR_CK",
"DDR_CKn"
]
},
{
"group": "Byte 0: placement-derived maximum length",
"maximumLengthMm": 18.52071,
"limitMm": 18.600277,
"status": "PASS",
"nets": [
"DDR_D0",
"DDR_D1",
"DDR_D2",
"DDR_D3",
"DDR_D4",
"DDR_D5",
"DDR_D6",
"DDR_D7",
"DDR_DQM0",
"DDR_DQS0",
"DDR_DQSn0"
]
},
{
"group": "Byte 1: placement-derived maximum length",
"maximumLengthMm": 12.120695,
"limitMm": 12.200131,
"status": "PASS",
"nets": [
"DDR_D8",
"DDR_D9",
"DDR_D10",
"DDR_D11",
"DDR_D12",
"DDR_D13",
"DDR_D14",
"DDR_D15",
"DDR_DQM1",
"DDR_DQS1",
"DDR_DQSn1"
]
},
{
"group": "Address/control + CK nominal length",
"minimumLengthMm": 34.990699,
"maximumLengthMm": 35.040711,
"nominalMm": 35.020161,
"allowedMinimumMm": 33.750161,
"allowedMaximumMm": 36.290161000000005,
"status": "PASS",
"nets": [
"DDR_A6",
"DDR_BA0",
"DDR_A8",
"DDR_A2",
"DDR_A10",
"DDR_BA2",
"DDR_A3",
"DDR_A12",
"DDR_A0",
"DDR_WEn",
"DDR_A4",
"DDR_A7",
"DDR_A11",
"DDR_A5",
"DDR_A9",
"DDR_BA1",
"DDR_CASn",
"DDR_RASn",
"DDR_CKE",
"DDR_CSn0",
"DDR_ODT",
"DDR_A1",
"DDR_CK",
"DDR_CKn"
]
}
],
"nets": {
"DDR_A6": {
"manhattanMm": 27.400061,
"endpoints": {
"U1": [
-4.4,
-3.6,
"top"
],
"U3": [
2.400046,
-24.200015,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9485765213054724,
"inner5": 34.07142347841953
}
},
"DDR_BA0": {
"manhattanMm": 20.200177,
"endpoints": {
"U1": [
-5.2,
-4.4,
"top"
],
"U3": [
-2.400046,
-21.800223,
"top"
]
},
"pathLengthMm": 35.040711,
"totalCopperMm": 35.040711,
"extraCopperMm": -0.0,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9341111714545827,
"inner3": 34.106599887378884
}
},
"DDR_A8": {
"manhattanMm": 27.400161,
"endpoints": {
"U1": [
-4.4,
-4.4,
"top"
],
"U3": [
2.400046,
-25.000115,
"top"
]
},
"pathLengthMm": 35.04068,
"totalCopperMm": 35.040804,
"extraCopperMm": 0.000124,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425107,
"inner2": 34.121441241327936
}
},
"DDR_A2": {
"manhattanMm": 21.000223,
"endpoints": {
"U1": [
-3.6,
-4.4,
"top"
],
"U3": [
-1.599946,
-23.400169,
"top"
]
},
"pathLengthMm": 35.019946,
"totalCopperMm": 35.020124,
"extraCopperMm": 0.000177,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9545941546018393,
"inner2": 34.06535210761575
}
},
"DDR_A10": {
"manhattanMm": 21.000069,
"endpoints": {
"U1": [
-2.8,
-4.4,
"top"
],
"U3": [
1.599946,
-21.000123,
"top"
]
},
"pathLengthMm": 35.040475,
"totalCopperMm": 35.040609,
"extraCopperMm": 0.000134,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425135,
"bottom": 34.12123610715998
}
},
"DDR_BA2": {
"manhattanMm": 21.000277,
"endpoints": {
"U1": [
-6,
-5.2,
"top"
],
"U3": [
-1.599946,
-21.800223,
"top"
]
},
"pathLengthMm": 35.032133,
"totalCopperMm": 35.032133,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.0194682605250236,
"inner5": 8.746194077712559,
"bottom": 25.2664704430454
}
},
"DDR_A3": {
"manhattanMm": 20.200023,
"endpoints": {
"U1": [
-5.2,
-5.2,
"top"
],
"U3": [
-2.400046,
-22.600069,
"top"
]
},
"pathLengthMm": 34.990716,
"totalCopperMm": 34.990799,
"extraCopperMm": 8.3e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425113,
"inner3": 34.0714769594912
}
},
"DDR_A12": {
"manhattanMm": 22.600015,
"endpoints": {
"U1": [
-3.6,
-5.2,
"top"
],
"U3": [
1.599946,
-22.600069,
"top"
]
},
"pathLengthMm": 34.990714,
"totalCopperMm": 34.990802,
"extraCopperMm": 8.8e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.933883476483184,
"inner3": 34.056830621525066
}
},
"DDR_A0": {
"manhattanMm": 18.600123,
"endpoints": {
"U1": [
-2.8,
-5.2,
"top"
],
"U3": [
-1.599946,
-22.600069,
"top"
]
},
"pathLengthMm": 35.019994,
"totalCopperMm": 35.020082,
"extraCopperMm": 8.8e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9338834764831839,
"inner4": 34.0861108556104
}
},
"DDR_WEn": {
"manhattanMm": 19.400177,
"endpoints": {
"U1": [
-6,
-6,
"top"
],
"U3": [
-1.599946,
-21.000123,
"top"
]
},
"pathLengthMm": 35.032144,
"totalCopperMm": 35.032278,
"extraCopperMm": 0.000134,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 0.9545941546018405,
"inner2": 8.324766569991116,
"inner5": 25.752783073212242
}
},
"DDR_A4": {
"manhattanMm": 25.000215,
"endpoints": {
"U1": [
-5.2,
-6,
"top"
],
"U3": [
2.400046,
-23.400169,
"top"
]
},
"pathLengthMm": 35.011222,
"totalCopperMm": 35.011398,
"extraCopperMm": 0.000175,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425113,
"inner5": 34.09198366534188
}
},
"DDR_CK": {
"manhattanMm": 19.400123,
"endpoints": {
"U1": [
-4.4,
-6,
"top"
],
"U3": [
1.599946,
-19.400177,
"top"
]
},
"pathLengthMm": 35.01997,
"totalCopperMm": 35.020155,
"extraCopperMm": 0.000185,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9899494936611671,
"inner2": 34.030020478689075
}
},
"DDR_A7": {
"manhattanMm": 19.399969,
"endpoints": {
"U1": [
-3.6,
-6,
"top"
],
"U3": [
-2.400046,
-24.200015,
"top"
]
},
"pathLengthMm": 35.040622,
"totalCopperMm": 35.04067,
"extraCopperMm": 4.8e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425111,
"inner5": 34.1213827718995
}
},
"DDR_A11": {
"manhattanMm": 22.599961,
"endpoints": {
"U1": [
-2.8,
-6,
"top"
],
"U3": [
1.599946,
-24.200015,
"top"
]
},
"pathLengthMm": 35.040648,
"totalCopperMm": 35.040704,
"extraCopperMm": 5.6e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425113,
"inner3": 34.12140894784636
}
},
"DDR_A5": {
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"endpoints": {
"U1": [
-6,
-6.8,
"top"
],
"U3": [
-2.400046,
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"top"
]
},
"pathLengthMm": 34.990727,
"totalCopperMm": 34.990902,
"extraCopperMm": 0.000175,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 0.9545941546018386,
"inner4": 29.852680178874017,
"inner3": 4.183452377915605
}
},
"DDR_A9": {
"manhattanMm": 21.000069,
"endpoints": {
"U1": [
-5.2,
-6.8,
"top"
],
"U3": [
-1.599946,
-24.200015,
"top"
]
},
"pathLengthMm": 35.032113,
"totalCopperMm": 35.032169,
"extraCopperMm": 5.6e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9545941546018389,
"inner4": 34.07751902648025
}
},
"DDR_CKn": {
"manhattanMm": 19.399969,
"endpoints": {
"U1": [
-4.4,
-6.8,
"top"
],
"U3": [
1.599946,
-20.200023,
"top"
]
},
"pathLengthMm": 35.040654,
"totalCopperMm": 35.040713,
"extraCopperMm": 5.9e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9192388155425111,
"inner2": 34.12141525484139
}
},
"DDR_BA1": {
"manhattanMm": 21.800115,
"endpoints": {
"U1": [
-3.6,
-6.8,
"top"
],
"U3": [
2.400046,
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"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 0,
"pathViaSites": 0,
"planarLengthByLayerMm": {
"top": 35.019999151816386
}
},
"DDR_CASn": {
"manhattanMm": 14.600077,
"endpoints": {
"U1": [
-2.8,
-6.8,
"top"
],
"U3": [
-1.599946,
-20.200023,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 0.969297509664877,
"bottom": 4.515685424949239,
"inner3": 29.535017002837076
}
},
"DDR_RASn": {
"manhattanMm": 15.400231,
"endpoints": {
"U1": [
-2,
-4.4,
"top"
],
"U3": [
-1.599946,
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"top"
]
},
"pathLengthMm": 35.019999,
"totalCopperMm": 35.019999,
"extraCopperMm": -0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 4.580084041368496,
"inner5": 14.271539090390227,
"inner4": 16.16837606128552
}
},
"DDR_D12": {
"manhattanMm": 9.800085,
"endpoints": {
"U1": [
0.4,
-4.4,
"top"
],
"U3": [
1.599946,
-13.000139,
"top"
]
},
"pathLengthMm": 12.1,
"totalCopperMm": 12.1,
"extraCopperMm": 0.0,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9340325972396206,
"inner5": 11.1659677513309
}
},
"DDR_D14": {
"manhattanMm": 10.600285,
"endpoints": {
"U1": [
1.2,
-4.4,
"top"
],
"U3": [
2.400046,
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"top"
]
},
"pathLengthMm": 12.070726,
"totalCopperMm": 12.070969,
"extraCopperMm": 0.000243,
"routedVias": 2,
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"planarLengthByLayerMm": {
"top": 0.9192388155425124,
"inner5": 11.151486793745297
}
},
"DDR_D1": {
"manhattanMm": 13.000185,
"endpoints": {
"U1": [
2,
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"top"
],
"U3": [
1.599946,
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"top"
]
},
"pathLengthMm": 18.499967,
"totalCopperMm": 18.500108,
"extraCopperMm": 0.000142,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9338834764831847,
"inner3": 17.56608330983358
}
},
"DDR_CKE": {
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"endpoints": {
"U1": [
-2,
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"top"
],
"U3": [
3.199892,
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"top"
]
},
"pathLengthMm": 34.990711,
"totalCopperMm": 34.990711,
"extraCopperMm": 0.0,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9339938984012999,
"inner2": 34.05671688507772
}
},
"DDR_D11": {
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"endpoints": {
"U1": [
0.4,
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"top"
],
"U3": [
-2.400046,
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"top"
]
},
"pathLengthMm": 12.070717,
"totalCopperMm": 12.070814,
"extraCopperMm": 9.7e-05,
"routedVias": 2,
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"planarLengthByLayerMm": {
"top": 0.9192388155425113,
"inner5": 11.151478658732595
}
},
"DDR_D13": {
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"endpoints": {
"U1": [
1.2,
-5.2,
"top"
],
"U3": [
-2.400046,
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"top"
]
},
"pathLengthMm": 12.070722,
"totalCopperMm": 12.070868,
"extraCopperMm": 0.000146,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.9338834764831834,
"inner3": 11.136838492274048
}
},
"DDR_D0": {
"manhattanMm": 14.599977,
"endpoints": {
"U1": [
2,
-5.2,
"top"
],
"U3": [
-1.599946,
-16.200031,
"top"
]
},
"pathLengthMm": 18.499992,
"totalCopperMm": 18.500054,
"extraCopperMm": 6.2e-05,
"routedVias": 2,
"pathViaSites": 2,
"planarLengthByLayerMm": {
"top": 0.933883476483184,
"inner2": 17.5661081061856
}
},
"DDR_RESETn": {
"manhattanMm": 19.400161,
"endpoints": {
"U1": [
-2,
-6,
"top"
],
"U3": [
-2.400046,
-25.000115,
"top"
]
},
"pathLengthMm": 24.053967,
"totalCopperMm": 34.377111,
"extraCopperMm": 10.323144,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 0.9192388155425113,
"inner4": 16.986852392894388,
"inner5": 6.147876185131468
}
},
"DDR_CSn0": {
"manhattanMm": 16.200169,
"endpoints": {
"U1": [
-1.2,
-6,
"top"
],
"U3": [
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"top"
]
},
"pathLengthMm": 34.990714,
"totalCopperMm": 34.990714,
"extraCopperMm": 0.0,
"routedVias": 4,
"pathViaSites": 4,
"planarLengthByLayerMm": {
"top": 0.9693701357618223,
"bottom": 29.62636864846441,
"inner2": 4.394974746830583
}
},
"DDR_DQM1": {
"manhattanMm": 10.600131,
"endpoints": {
"U1": [
-0.4,
-6,
"top"
],
"U3": [
-1.599946,
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"top"
]
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