astra/am3352-sbc
A 4-layer AM3352 single-board computer with 128‑MiB DDR3, PMIC power regulation, USB‑C 5‑V PD input, dual USB host ports, HDMI output with ESD protection, microSD/UART/JTAG interfaces, addressable RGB indicators, and a PWM-driven buzzer.
- Version
- 0.1.19
- License
- unset
- Stars
- 0
output/ddr-audit.json
{
"circuitSha256": "2075f982c3230a5b8f2194529baed00eada2d79f013c715f9d178fe502571f6b",
"reference": "https://www.ti.com/lit/ds/symlink/am3352.pdf",
"revision": "SPRS717L",
"router": "bus_lanes",
"configuredSolverVersion": "0.0.19",
"copperProvenance": "Precomputed DDR copper; audit does not reroute it",
"routed": 47,
"expected": 47,
"ddrEndpointCount": 94,
"geometricTimingPassed": false,
"nativeCopperErrors": [],
"ddrConnectivityErrors": [],
"nativeTimingErrors": [],
"pass": false,
"failures": [
"DDR_BYTE0: lengths 44.7954–45.4304 mm outside 0.0000–42.4001 mm",
"DDR_BYTE1: lengths 39.4479–40.0829 mm outside 0.0000–36.0003 mm"
],
"groups": [
{
"name": "DDR_BYTE0",
"memberCount": 11,
"minLengthMm": 44.795382650111534,
"maxLengthMm": 45.430382650187155,
"skewMm": 0.6350000000756211,
"maxSkewMm": 0.635,
"nominalMm": 42.40012300000001,
"minimumMm": 0,
"maximumMm": 42.40012300000001,
"skewPass": true,
"absoluteLengthPass": false,
"routingPass": true,
"pass": false
},
{
"name": "DDR_BYTE1",
"memberCount": 11,
"minLengthMm": 39.44786378887629,
"maxLengthMm": 40.082863788935704,
"skewMm": 0.6350000000594136,
"maxSkewMm": 0.635,
"nominalMm": 36.000285000000005,
"minimumMm": 0,
"maximumMm": 36.000285000000005,
"skewPass": true,
"absoluteLengthPass": false,
"routingPass": true,
"pass": false
},
{
"name": "DDR_ADDR_CTRL_CK",
"memberCount": 24,
"minLengthMm": 47.95016099996477,
"maxLengthMm": 48.23320960723517,
"skewMm": 0.2830486072703948,
"maxSkewMm": 0.635,
"nominalMm": 49.220161,
"minimumMm": 47.950160999999994,
"maximumMm": 50.490161,
"skewPass": true,
"absoluteLengthPass": true,
"routingPass": true,
"pass": true
}
],
"pairs": [
{
"name": "DDR_DQS_PAIR0",
"skewMm": 0.12226497234209432,
"sameLayer": true,
"pass": true
},
{
"name": "DDR_DQS_PAIR1",
"skewMm": 0.12699999999999534,
"sameLayer": true,
"pass": true
},
{
"name": "DDR_CK_PAIR",
"skewMm": 0.06072583002030285,
"sameLayer": true,
"pass": true
}
],
"measurements": [
{
"name": "DDR_ODT",
"connectionName": "source_trace_0",
"lengthMm": 47.950161000000065,
"padManhattanMm": 31.200131,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D13",
"connectionName": "source_trace_1",
"lengthMm": 39.447863788935756,
"padManhattanMm": 29.600093,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_D11",
"connectionName": "source_trace_2",
"lengthMm": 39.44786378893575,
"padManhattanMm": 30.400039,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D2",
"connectionName": "source_trace_3",
"lengthMm": 44.79538265011802,
"padManhattanMm": 33.600085,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D6",
"connectionName": "source_trace_4",
"lengthMm": 44.79538265011796,
"padManhattanMm": 36.800185,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_CSn0",
"connectionName": "source_trace_5",
"lengthMm": 47.950161000000165,
"padManhattanMm": 34.400076999999996,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_BA0",
"connectionName": "source_trace_6",
"lengthMm": 47.95016100000022,
"padManhattanMm": 32.800177,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A3",
"connectionName": "source_trace_7",
"lengthMm": 47.95016100000007,
"padManhattanMm": 32.800022999999996,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A5",
"connectionName": "source_trace_8",
"lengthMm": 47.95016100000009,
"padManhattanMm": 31.200122999999998,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_A7",
"connectionName": "source_trace_9",
"lengthMm": 47.950161000000115,
"padManhattanMm": 35.199969,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_RESETn_SIGNAL",
"connectionName": "source_trace_10",
"lengthMm": 57.83637042017408,
"padManhattanMm": 37.600069000000005,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D15",
"connectionName": "source_trace_11",
"lengthMm": 39.44786378893577,
"padManhattanMm": 29.600193,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D9",
"connectionName": "source_trace_12",
"lengthMm": 39.447863788935784,
"padManhattanMm": 29.600139,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_DQM1",
"connectionName": "source_trace_13",
"lengthMm": 39.44786378893574,
"padManhattanMm": 30.400239,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_D0",
"connectionName": "source_trace_14",
"lengthMm": 44.79538265011799,
"padManhattanMm": 34.400085000000004,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_DQS0",
"connectionName": "source_trace_15",
"lengthMm": 44.79676712103152,
"padManhattanMm": 35.200185,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_DQSn0",
"connectionName": "source_trace_16",
"lengthMm": 44.919032093373616,
"padManhattanMm": 36.800285,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_D4",
"connectionName": "source_trace_17",
"lengthMm": 44.795382650117965,
"padManhattanMm": 37.600131000000005,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_RASn",
"connectionName": "source_trace_18",
"lengthMm": 47.950161000000115,
"padManhattanMm": 34.400231,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_CASn",
"connectionName": "source_trace_19",
"lengthMm": 47.95016100000012,
"padManhattanMm": 32.000077,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_WEn",
"connectionName": "source_trace_20",
"lengthMm": 47.95016100000019,
"padManhattanMm": 30.400177,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_BA2",
"connectionName": "source_trace_21",
"lengthMm": 47.950161000000136,
"padManhattanMm": 32.000277,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A0",
"connectionName": "source_trace_22",
"lengthMm": 47.95016100000013,
"padManhattanMm": 36.000123,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_A2",
"connectionName": "source_trace_23",
"lengthMm": 47.95016100000026,
"padManhattanMm": 36.800223,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A9",
"connectionName": "source_trace_24",
"lengthMm": 47.950161000000136,
"padManhattanMm": 33.600069,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D12",
"connectionName": "source_trace_25",
"lengthMm": 39.83196906057594,
"padManhattanMm": 33.60008500000001,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_DQSn1",
"connectionName": "source_trace_26",
"lengthMm": 39.574863788935716,
"padManhattanMm": 33.600185,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_DQS1",
"connectionName": "source_trace_27",
"lengthMm": 39.44786378893572,
"padManhattanMm": 33.600031,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D8",
"connectionName": "source_trace_28",
"lengthMm": 40.082863788935704,
"padManhattanMm": 32.800131,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_DQM0",
"connectionName": "source_trace_29",
"lengthMm": 44.795382650117965,
"padManhattanMm": 36.799977000000005,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_D1",
"connectionName": "source_trace_30",
"lengthMm": 44.795382650111534,
"padManhattanMm": 39.20007700000001,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D7",
"connectionName": "source_trace_31",
"lengthMm": 44.795382650191215,
"padManhattanMm": 42.400023000000004,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_CK",
"connectionName": "source_trace_32",
"lengthMm": 48.07716100000002,
"padManhattanMm": 33.600123,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_CKn",
"connectionName": "source_trace_33",
"lengthMm": 48.016435169979715,
"padManhattanMm": 33.599969,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A10",
"connectionName": "source_trace_34",
"lengthMm": 47.95016100003431,
"padManhattanMm": 38.400069,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_A12",
"connectionName": "source_trace_35",
"lengthMm": 47.95016100000004,
"padManhattanMm": 38.400015,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_A1",
"connectionName": "source_trace_36",
"lengthMm": 48.23320960723517,
"padManhattanMm": 40.000115,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A11",
"connectionName": "source_trace_37",
"lengthMm": 47.95016100000011,
"padManhattanMm": 39.999961,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D14",
"connectionName": "source_trace_38",
"lengthMm": 39.44786378887629,
"padManhattanMm": 36.000285000000005,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_D10",
"connectionName": "source_trace_39",
"lengthMm": 39.44786378893571,
"padManhattanMm": 34.400131,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D3",
"connectionName": "source_trace_40",
"lengthMm": 44.79538265011795,
"padManhattanMm": 39.200177000000004,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_D5",
"connectionName": "source_trace_41",
"lengthMm": 45.430382650187155,
"padManhattanMm": 42.40012300000001,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_BA1",
"connectionName": "source_trace_42",
"lengthMm": 47.950161000000044,
"padManhattanMm": 37.600115,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A4",
"connectionName": "source_trace_43",
"lengthMm": 47.9501610000025,
"padManhattanMm": 37.60021499999999,
"innerLayers": [
"inner1"
],
"routePass": true
},
{
"name": "DDR_A6",
"connectionName": "source_trace_44",
"lengthMm": 47.95016099996477,
"padManhattanMm": 41.600061,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_A8",
"connectionName": "source_trace_45",
"lengthMm": 47.95016099997994,
"padManhattanMm": 41.600161,
"innerLayers": [
"inner2"
],
"routePass": true
},
{
"name": "DDR_CKE",
"connectionName": "source_trace_46",
"lengthMm": 47.950161000000094,
"padManhattanMm": 39.199915000000004,
"innerLayers": [
"inner1"
],
"routePass": true
}
],
"notVerified": [
"Fabricator stackup and controlled impedance",
"Reference-plane continuity and return-current stitching",
"Spacing/coupling geometry and native copper DRC",
"Package/via flight times and unterminated CA/CK signal integrity"
],
"fabricationReady": false,
"signoffBlockers": [
"JLC04161H-3313 stackup selected and calculated; existing DDR copper still needs migration to the calculated widths/gaps and manufacturer coupon confirmation",
"Top DDR_1V5 has bridged islands; electrical connectivity does not prove continuous high-frequency reference planes",
"Via/package flight-time correction and reference return-current stitching are not signed off",
"Unterminated single-x16 CA/CK topology needs SI analysis (TI Figure 7-48 and section 7.7.2.3.3.9)",
"TI spacing exceptions, pair coupling, decoupling and complete supply distribution are not signed off"
]
}
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