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Float the Boat - Extend the Caravel SoC

Use generative AI (e.g. chatGPT, Bard or similar) to generate open source silicon designs. This challenge is themed “Float the Boat" – Extend the Caravel SoC with useful and verified AI-generated 50MHz / 32-bit microcontroller peripherals such as USB 1.1 including PHY. USB OTG, PCM, I2S.


In this contest, we invite you to utilize generative AI such as chatGPT, Bard, or similar tools to generate a complete Verilog model for your design. Your design must be implemented using efabless’ chipIgnite that includes the Caravel SoC for rapid chip-level integration and the open-source RTL-to-GDS digital design flow, OpenLane.

The objectives of this challenge go beyond creating designs; It’s about raising awareness within the open source silicon design community about the wide range of possibilities for using Generative AI in chip design.
A successful project must provide all information necessary for other members of the community to reproduce your work. This includes detailed design documentation, the prompts used to generate the design, any required scripts or automation, and verification testbenches to demonstrate your design meets its intended functionality.


  1. A 2-minute video showing how to generate a simple design using Generative AI
  2. Explore and learn from winning projects from previous challenges


Be among one of the first to design and tapeout an AI generated open-source silicon design. Participants will be eligible to win free fabrication for their design and receive public recognition and promotion of their design by Efabless. We are targeting to select at least three winners and designs to be fabricated based on the quality of the submissions. We are also working with industry partners to support fabricating additional projects.

In addition, each submission that meets the requirements will received a development board with a fabricated chip from one of the winning projects.

How to Enter

  1. Join the challenge channel #generative-ai-silicon-challenge on open-source-silicon.dev Slack space for updates and additional help and resources.
  2. Register on the Efabless platform if you have not already done so.
  3. Submit your entry by including all content on a public GitHub repo.
  4. Create a public project for the chipIgnite CI 2311 shuttle using the GitHub repo from the previous step. Please include AI-design-contest in the label field when you create your project.
  5. Submit success precheck and tapeout jobs for your design.
  6. Complete the remainder of the billing and shipping information as well as terms and export agreements. You will not be charged or invoiced for your submission. Complete the final submission for the project on the platform.
  7. Send an email to shuttle+genai@efabless.com with a link to your project.

Limit one entry per person, per email address. Your entry must be original.

Note: If you have not received permission to use copyrighted material, you may not include the material in your entry.

Judging Criteria:

All designs will be judged by a panel of experts who share a lifelong commitment to electronics and believe in the power of AI and machine learning to drive innovation. Below are the evaluation criteria:

  • Project Documentation
  • Prompt Documentation
  • Code Quality
  • Verification Coverage
  • Design Technical Merit
  • Methodology Technical Merit
  • Project Description and Community Interest Poll

All requirements must be met to be eligible to win

  1. All submission content, documentation, prompt must be in English
  2. A short description of the project must be included with your design. It will be used for introducing your idea in the community poll.
  3. All designs must be implemented and fit in the Caravel User Project area.
  4. The Verilog for the design must be coded by AI.
  5. Verification may be done outside of the AI environment but verification testbenches must be provided as a reproducible element of this process.
  6. All prompts or auto GPT session logs used in the design must be provided as part of the deliverables for the design.
  7. The design needs to be open source with all materials required to reproduce made public.
  8. To facilitate reproducibility by the community, we recommend the design be implemented using the OpenLane chipIgnite flow including all configuration and run results. However, we will accept any open-source implementation flow provided it is documented and reproducible.
  9. Must have testbenches for RTL verification as well as constraints for STA and SDF simulations.
  10. Must be implementable in SKY130 with available standard cells and DFFRAM and not require open RAM or other discrete memories for implementation.
  11. The design must pass precheck and tapeout submissions on the Efabless platform.
  12. Winners must provide a video and screenshots demonstrating the creation of the project in a how-to or step-by-step format. The images and link to the video must be included in the documentation for their project in the GitHub repo. These materials may be used by Efabless for promotional purposes.

Judging Panel


Evgeni Gousev

Senior Director; Qualcomm

Chairman; tinyML Foundation


J. Augusto de Oliveira

Former CTO; Cypress Semiconductor
CSO/CTO Rocky Crest Consulting
Associate Director, TD Shepherd


Naveed Sherwani

Chairman, President & CEO; RapidSilicon


Brandon Wang

Head of Chief Innovation Office and VP, Corporate Strategy and New Ventures; Synopsys


Weijie Yun

Founder and Managing Partner; Tyche Partners

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Dr. Hammond Pearce

Lecturer (Assistant Professor) at UNSW Sydney School of Computer Science and Engineering

Official Rules


Participants must be able to receive silicon and parts shipped from the United States. As such, members of United States embargoed or sanctioned countries are not eligible to participate.

Current employees of Efabless or their family members are also not eligible to participate.


The submission deadline is Thursday, November 2, 2023 at 11:59 pm PT.


The contest is sponsored by Efabless Corporation, 165 University Ave, Palo Alto, CA 94301

Agreement to Official Rules

Participation in the contest constitutes participant’s full and unconditional agreement to and acceptance of these Official Rules and the decision of the Sponsor, which are final and binding.

An entry may be rejected at the sole and absolute discretion of Efabless.

By entering the contest, you agree and allow Efabless to use, display, and publish a winner's identity, including their name and photo, in promotional materials. The participants also agree that Efabless has the right to use participant’s designs and other material in sales and marketing.

Contest Winner Announcement

Contest winners will be announced on Thursday, November 9, 2023.

The winner will be provided fabrication at no cost in the November 6th, chipIgnite shuttle, CI 2311.


Please contact shuttle@efabless.com if you have any questions about this contest.

We also created a channel on our community Slack site. Please feel free to reach out to us there and follow updates on the contest.

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