seveibar/am3352-dev-board-4layer-dogbone
Defines PCB footprints and pin mappings for a TI AM3352ZCZ100 processor, JST GH connectors, and assembly-part lookup helpers for capacitors, resistors, and headers.
- Version
- 0.1.5
- License
- unset
- Stars
- 0
design/ddr-skew-check.json
{
"circuitSha256": "d75afa3436b49908533fa273a58e4d9a8bc65c04031373de97ce66584f0430b6",
"method": "Shortest processor-ball-center to RAM-ball-center path through routed centerlines, joining graph nodes at 1 micrometre resolution and weighting edges by unrounded geometry. Planar path lengths exclude vias. Separate skew groups include used vertical barrel travel: collapse zero-length barrel graph nodes, sum layer-depth differences, and report a value only when unspecified inner-layer depths cancel algebraically. Package delay and layer-dependent propagation are not included. 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": 0.019584,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D0",
"longest": "DDR_D6",
"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": 0.019585,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D0",
"longest": "DDR_DQS0",
"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": 2e-06,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_DQSn0",
"longest": "DDR_DQS0",
"nets": [
"DDR_DQS0",
"DDR_DQSn0"
]
},
{
"group": "Byte 1: DQ + DM",
"skewMm": 0.009887,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D11",
"longest": "DDR_D14",
"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": 0.009887,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_D11",
"longest": "DDR_D14",
"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": 1e-06,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_DQSn1",
"longest": "DDR_DQS1",
"nets": [
"DDR_DQS1",
"DDR_DQSn1"
]
},
{
"group": "CK differential pair",
"skewMm": 1e-06,
"limitMm": 0.127,
"status": "PASS",
"shortest": "DDR_CKn",
"longest": "DDR_CK",
"nets": [
"DDR_CK",
"DDR_CKn"
]
},
{
"group": "Address/control + CK envelope",
"skewMm": 1e-05,
"limitMm": 0.635,
"status": "PASS",
"shortest": "DDR_RASn",
"longest": "DDR_A4",
"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": 18.180001,
"limitMm": 18.6,
"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": 12.195001,
"limitMm": 12.2,
"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": 35.019994,
"maximumLengthMm": 35.020004,
"nominalMm": 35.019999999999996,
"allowedMinimumMm": 33.74999999999999,
"allowedMaximumMm": 36.29,
"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"
]
},
{
"group": "Byte 0: DQ + DM including vias",
"skewMm": 0.019584,
"limitMm": 0.635,
"status": "PASS",
"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 including vias",
"skewMm": 0.019585,
"limitMm": 0.635,
"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": "DQS0 differential pair including vias",
"skewMm": 2e-06,
"limitMm": 0.127,
"status": "PASS",
"nets": [
"DDR_DQS0",
"DDR_DQSn0"
]
},
{
"group": "Byte 1: DQ + DM including vias",
"skewMm": 0.009887,
"limitMm": 0.635,
"status": "PASS",
"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 including vias",
"skewMm": 0.009887,
"limitMm": 0.635,
"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": "DQS1 differential pair including vias",
"skewMm": 1e-06,
"limitMm": 0.127,
"status": "PASS",
"nets": [
"DDR_DQS1",
"DDR_DQSn1"
]
},
{
"group": "CK differential pair including vias",
"skewMm": 1e-06,
"limitMm": 0.127,
"status": "PASS",
"nets": [
"DDR_CK",
"DDR_CKn"
]
},
{
"group": "Address/control + CK envelope including vias",
"skewMm": 1e-05,
"limitMm": 0.635,
"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": 27.4,
"endpoints": {
"U1": [
-4.4,
-3.6,
"top"
],
"U3": [
2.4,
-24.2,
"top"
]
},
"pathLengthMm": 35.019999,
"totalCopperMm": 35.019999,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.8624368670764595,
"bottom": 17.24110627357227,
"inner2": 15.916981334551181
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419999
},
"DDR_BA0": {
"manhattanMm": 20.2,
"endpoints": {
"U1": [
-5.2,
-4.4,
"top"
],
"U3": [
-2.4,
-21.8,
"top"
]
},
"pathLengthMm": 35.020001,
"totalCopperMm": 35.020001,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.157388960392956,
"inner2": 22.581800759400164,
"bottom": 11.28522603431629
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.420001
},
"DDR_A8": {
"manhattanMm": 27.4,
"endpoints": {
"U1": [
-4.4,
-4.4,
"top"
],
"U3": [
2.4,
-25.0,
"top"
]
},
"pathLengthMm": 35.019999,
"totalCopperMm": 35.019999,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.0278174593052012,
"bottom": 18.967049964142085,
"inner2": 15.025914498161482
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419999
},
"DDR_A2": {
"manhattanMm": 21.0,
"endpoints": {
"U1": [
-3.6,
-4.4,
"top"
],
"U3": [
-1.6,
-23.4,
"top"
]
},
"pathLengthMm": 35.020001,
"totalCopperMm": 35.020001,
"extraCopperMm": -0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 10.262310601229377,
"bottom": 7.574999999999999,
"inner2": 17.18440151484795
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.420001
},
"DDR_A10": {
"manhattanMm": 21.0,
"endpoints": {
"U1": [
-2.8,
-4.4,
"top"
],
"U3": [
1.6,
-21.0,
"top"
]
},
"pathLengthMm": 35.019998,
"totalCopperMm": 35.019998,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.5545941546018385,
"bottom": 26.4127216540543,
"inner2": 7.052386360737624
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419998
},
"DDR_BA2": {
"manhattanMm": 21.0,
"endpoints": {
"U1": [
-6,
-5.2,
"top"
],
"U3": [
-1.6,
-21.8,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.9503048327204935,
"bottom": 3.550851947190611,
"inner2": 29.518547523224054
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.42
},
"DDR_A3": {
"manhattanMm": 20.2,
"endpoints": {
"U1": [
-5.2,
-5.2,
"top"
],
"U3": [
-2.4,
-22.6,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 2.6263455967290588,
"inner2": 17.637447896479944,
"bottom": 14.756423150924803
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.42
},
"DDR_A12": {
"manhattanMm": 22.6,
"endpoints": {
"U1": [
-3.6,
-5.2,
"top"
],
"U3": [
1.6,
-22.6,
"top"
]
},
"pathLengthMm": 35.020001,
"totalCopperMm": 35.020001,
"extraCopperMm": -0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.027817459305201,
"bottom": 30.04207786579318,
"inner2": 3.950000000000001
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.420001
},
"DDR_A0": {
"manhattanMm": 18.6,
"endpoints": {
"U1": [
-2.8,
-5.2,
"top"
],
"U3": [
-1.6,
-22.6,
"top"
]
},
"pathLengthMm": 35.019999,
"totalCopperMm": 35.019999,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 2.810660171779824,
"bottom": 14.255988953186014,
"inner2": 17.953390106821104
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419999
},
"DDR_WEn": {
"manhattanMm": 19.4,
"endpoints": {
"U1": [
-6,
-6,
"top"
],
"U3": [
-1.6,
-21.0,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.083883476483186,
"inner2": 25.751877976336218,
"bottom": 8.1837572106361
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.42
},
"DDR_A4": {
"manhattanMm": 25.0,
"endpoints": {
"U1": [
-5.2,
-6,
"top"
],
"U3": [
2.4,
-23.4,
"top"
]
},
"pathLengthMm": 35.020004,
"totalCopperMm": 35.020004,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 0.9467514421272211,
"bottom": 18.5094932982624,
"inner2": 15.566473657263634
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.420004
},
"DDR_CK": {
"manhattanMm": 19.4,
"endpoints": {
"U1": [
-4.4,
-6,
"top"
],
"U3": [
1.6,
-19.4,
"top"
]
},
"pathLengthMm": 35.020001,
"totalCopperMm": 35.020001,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.9331475451951143,
"inner2": 16.01260338018803,
"bottom": 17.075473149649362
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.420001
},
"DDR_A7": {
"manhattanMm": 19.4,
"endpoints": {
"U1": [
-3.6,
-6,
"top"
],
"U3": [
-2.4,
-24.2,
"top"
]
},
"pathLengthMm": 35.019997,
"totalCopperMm": 35.019997,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 1.2235281374238558,
"bottom": 23.05564649258674,
"inner2": 10.739601383833676
},
"layerSequence": [
"top",
"bottom",
"inner2",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419997
},
"DDR_A11": {
"manhattanMm": 22.6,
"endpoints": {
"U1": [
-2.8,
-6,
"top"
],
"U3": [
1.6,
-24.2,
"top"
]
},
"pathLengthMm": 35.019998,
"totalCopperMm": 35.019998,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 26.6718809384118,
"inner2": 5.145710678118655,
"bottom": 3.2023863607376235
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419998
},
"DDR_A5": {
"manhattanMm": 20.2,
"endpoints": {
"U1": [
-6,
-6.8,
"top"
],
"U3": [
-2.4,
-23.4,
"top"
]
},
"pathLengthMm": 35.019995,
"totalCopperMm": 35.020118,
"extraCopperMm": 0.000123,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
"top": 9.434816803014142,
"inner2": 8.477516142608257,
"bottom": 17.10460658389015
},
"layerSequence": [
"top",
"inner2",
"bottom",
"top"
],
"depthCoefficients": {
"top": -2,
"inner1": 0,
"inner2": 0,
"bottom": 2
},
"verticalLengthMm": 2.4,
"lengthIncludingViasMm": 37.419995
},
"DDR_A9": {
"manhattanMm": 21.0,
"endpoints": {
"U1": [
-5.2,
-6.8,
"top"
],
"U3": [
-1.6,
-24.2,
"top"
]
},
"pathLengthMm": 35.02,
"totalCopperMm": 35.02,
"extraCopperMm": 0.0,
"routedVias": 3,
"pathViaSites": 3,
"planarLengthByLayerMm": {
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