Programmable Logic Core Enhancements for High-Speed On-Chip Interfaces
Bibliographic record
Abstract
Programmable logic cores (PLCs) offer a means of providing post-fabrication reconfigurability to a SoC design. This ability has the potential to significantly enhance the SoC design process by enabling post-silicon debugging, design error correction and post-fabrication feature enhancement. However, circuits implemented in general purpose programmable logic will inevitably have lower timing performance than fixed function circuits. This fundamental mismatch makes it difficult to use the PLC effectively. We address this problem by proposing changes to the structure of the PLC itself; these architectural enhancements enable circuit implementations with high performance interfaces. In previous work we addressed system bus interfaces, in this work we address direct synchronous interfaces. Our results show significant improvement in PLC interface timing, such that interaction with full-speed fixed-function SoC logic is possible. Our enhanced PLCs are able to implement direct synchronous interfaces running at, on average, 662 MHz (compared to 249 MHz in regular programmable logic). We are able to do this without compromising the basic structure or routiblity of the programmable fabric. At the same time, we show that the area overhead for these architectural changes was approximately 1%.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".