| ## Background |
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| This is level 4 of 5 and continues the work of the earlier levels. The new files for this level are in `workspace/t4/`. The records from the start are in `workspace/t1/`, and the earlier results are in `workspace/t1/results/` to `workspace/t3/results/`. |
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| ## Task |
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| Subject: switching our backend to ORFS |
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| Hi, |
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| I would like to move the backend onto OpenROAD-flow-scripts to reduce our mirror maintenance. I have fetched the SG13G2 platform and example configurations under OpenROAD-flow-scripts, along with mpw-shuttles/TO_Sep2025 and the IHP release views under pdk-releases. The picosoc_ac_controller submission is the example behind my proposal; my notes are in tapeout-2026/notes. |
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| Mira wants a concrete integration we can try before agreeing. Carry your re-pin and memory configuration into an ORFS project configuration for Croc. Keep the sign-off coverage from your IO review, and the memory has to keep working the way it did after your re-pin. Check the resulting library and physical-view coverage and demonstrate memory operation with the models the configuration selects. |
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| Check the mapped read budget under the delivered ORFS configuration against your re-pin qualification, and account for any change. |
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| Alongside that, reconcile the picosoc team's published path timing with the candidate library generations, including the uncertainty in its printed values and a consistent account of the path operating conditions. Quantify whether those path results transfer to our re-pinned libraries as the path operating conditions change, and assess what the SRAM evidence establishes. Use the library and timing work you have already done. |
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| Please put the review, validation results and recommendation in workspace/t4/results/orfs_review.xlsx, and the configuration change as a patch against the shared workspace in workspace/t4/results/platform.patch.txt. We need to distinguish adopting the ORFS scripts from adopting their packaged libraries. |
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| Jonas |
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| ## Input |
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| - `workspace/t1/`: the records supplied with the work (`croc/`, `tapeout-2026/`). |
| - `workspace/t2/`: the files that came with level t2 (`tapeout-2026/`, `tapeout-archive/`). |
| - `workspace/t3/`: the files that came with level t3 (`IHP-Open-PDK/`, `tapeout-2026/`). |
| - `workspace/t4/`: the files that came with level t4 (`OpenROAD-flow-scripts/`, `mpw-shuttles/`, `pdk-releases/`, `tapeout-2026/`). |
| - `workspace/t1/results/`: the results of level t1. |
| - `workspace/t2/results/`: the results of level t2. |
| - `workspace/t3/results/`: the results of level t3. |
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| ## Output |
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| - `workspace/t4/results/orfs_review.xlsx` |
| - `workspace/t4/results/platform.patch.txt` |
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