# AM3352 DDR Track C — engineering WIP PCB preview
**Saved native stackup-first preview: 11 DDR endpoint routes and 179 selected pad-to-plane joins. Matching and full-board connectivity incomplete. Not fabrication-ready.**
316 components, 190 trace records, 179 ordinary through-vias, 4 filled pours. Current standard stack JLC08121H-3313, finished 1.18 mm. Native output retains 975 unconnected-port errors, 173 generic via-pad findings and 2 length-matching failures. Byte spread 10.440 mm and strobe mismatch 0.800 mm fail the current limits. Remaining 36 DDR signals, peripheral/rail connectivity, DFM and SI qualification remain open.
The default public PCB reads the exact saved routed `routed/circuit.json`: SHA-256 `b4df5185814ebaa17a19675b586702e62f3470bbea3a8d33079150b4ea3ee38e`. The hosted build reconstructs the saved bytes, exports a viewer from JSON, verifies every record, and preserves the original bytes in `dist/routed/circuit.json`. It does not reroute the authored TSX.
`index.tsx` and its local source dependencies are included unchanged. Exact source from native-source-inputs-20261007.json, built by owner with savedByte=true and planes=true. Saved native output is authoritative; default source flags do not reproduce this view.
Frozen checkpoint: `native-byte-schema-20261007`. The source and copper hashes, counts and status are recorded in `frozen-preview-manifest.json`. The registry upload uses small gzip transport chunks; run `bun scripts/reconstruct.mjs` after cloning to recover the exact routed JSON.
This is a public preview of incomplete engineering work. Full-board electrical, signal-integrity, manufacturing, assembly, footprint and startup/firmware qualification remain open.
The original published b28 baseline remains at https://tscircuit.com/0hmX/am3352-ethernet-rgb-b28-987 and is not overwritten by this package.
The viewer-only export uses `tsci build --ignore-errors` so this engineering WIP remains inspectable despite its 1,150 saved error records. Every error record is preserved in the public routed JSON; this flag changes the export exit code and does not waive or repair any engineering release gate.