Latch-Up 2026

Friday to Sunday May 1–3, 2026 in Waterloo, Ontario, Canada. The Latch-Up conference is a weekend of presentations and networking dedicated to free and open source silicon. It's an event for the open source digital design community, much like its European sister conference ORConf, run by the FOSSi Foundation.

Latch-Up 2026 invites the free and open source silicon community to Canada!

The FOSSi Foundation is proud to announce Latch-Up, a conference dedicated to free and open source silicon to be held over the weekend of Friday May 1 to Sunday May 3 in Waterloo, Ontario, Canada.

Latch-Up is a weekend of presentations and networking for the open source digital design community, much like its European sister conference ORConf.

Questions? Send an email to latch-up@fossi-foundation.org.

Register

Latch-Up is free to attend. If you are able to, please help running the event by considering a "Pay what you want" ticket with an donation. If you are attending Latch-Up on behalf of their company are encouraged to donate in the form of a professional ticket. Please choose one option in the checkout process -- you do not need a "Free" ticket in addition to a "Pay what you want" ticket.

Submit a talk

Presentations are submitted through the Eventbrite registration interface.

Please make your submissions as early as you can, as the presentation slots are likely to fill up quickly.

We have extended the submission deadline for talks to Sunday, April 5, 2026!

We aim to give as many people as possible the opportunity to present their exciting work on free and open source silicon. To accomodate for that we will determine the duration of a full talk once all submissions are in. Historically, full talks ran for 10 minutes (plus time for questions). Lighning talks will be 3 minutes. The exact amount of time you'll get will be communicated on acceptance of your talk.

Latch-Up invites presentations on all aspects of free and open source silicon, including (but not limited to):

  • IP cores and design examples
  • Verification tools and methodology
  • Hardware description languages
  • EDA tools
  • Physical design and PDKs

All presentations are expected to cover projects and tools that are available under a free and open source license.

Code of conduct

We ask all Latch-Up participants to adhere to the the FOSSi Foundation code of conduct throughout the event.

Sponsors

Latch-Up is free to attend, but we aim to provide catering and the like during the event. Latch-Up is also a great way to get your company or brand in front of lots of engineers and hackers on the day, and thousands more through recordings of the event.

Please get in touch at latch-up@fossi-foundation.org if you'd like to explore sponsorship opportunities.

A variety of sponsorship packages are available for this year's Latch-Up. You'll find all of the details in our sponsorship prospectus.

Latch-Up is organized by volunteers on behalf of the FOSSi Foundation. We are currently looking for more people to help out with arrangements and putting on the event, so please do email us if you would like to volunteer for during the event with setup, AV, or even just local knowledge so we can plan the weekend better.

Talks

Strengthening Engineering Curriculum and Opportunities for Undergraduate Students through FOSSi

Vraj Prajapati

This talk outlines the University of Toronto ASIC Team's initiative to democratize silicon engineering by leveraging the Free and Open Source Silicon (FOSSi) ecosystem.

By adopting open-source tools the team enables undergraduates to experience the complete design cycle, resulting in tangible tapeouts through services like TinyTapeout. The presentation will detail the team's extracurricular impact—including the university's first IC Design Hackathon—and its strategic partnership with the ECE faculty to rewrite and modernize core course laboratories. This integration of open-source methodologies into both student competitions and formal lab curricula demonstrates a scalable model for making engineering education more practical and industry-relevant.

Mr. Scrub: An Open-Source, Internal Scrubber for UltraScale FPGAs

Graeme Smecher

Mr. Scrub is an open-source, internal scrubber for AMD’s UltraScale FPGAs. We document the algorithms used for SECDED of the device’s configuration frames. We also describe validation of the scrubber using fault injection.

Bluespec FSM: The Hidden Gem

Michael Jaggers

FSMs drive the control plane of hardware: sequences, protocols, arbitration, and recovery logic. Despite language evolution, the way FSMs are written often has not changed. Many "high level" HDLs still express sequencing using the same legacy structure: explicit state variables, explicit transitions, and growing scaffolding as designs evolve. This talk shows a few concrete examples where modern syntax and tooling still lead back to the classic FSM pattern, and why that pattern becomes brittle at scale. Then we focus on the hidden gem: Bluespec. With guarded atomic actions and sequencing as first-class concepts, Bluespec changes the shape of FSM code, making control intent clearer and large stateful behavior more maintainable.

GDSFactory: Open-Source EDA for Photonics, Quantum, MEMS, and RF Chip Design

Joaquin Matres

The design of advanced Analog chips‚ especially in photonics, quantum, MEMS, and RF, faces critical challenges due to rigid, outdated EDA tools. Many teams resort to custom Python, C, or MATLAB solutions, which offer flexibility but lack scalability. To bridge this gap, we created GDSFactory, an open-source, python-based Analog Electronic Design Automation software that has been downloaded over 2 million times and adopted by companies, universities, and research organizations worldwide.

Instruction Cache Optimization in VexRiscv RISC-V Processors (lightning talk)

Wadood Wasay

Open-source RISC-V cores such as VexRiscv offer flexible architectures for embedded FPGA and ASIC implementations, but instruction cache configurations significantly influence performance, area, and power trade-offs. This work presents a quantitative analysis of instruction cache optimization within the VexRiscv core, evaluating performance impacts across multiple cache configurations in resource-constrained environments. Through synthesis and benchmarking on FPGA and ASIC-targeted workflows, we analyze utilization, and efficiency metrics to identify optimal design trade-offs. Results demonstrate measurable improvements in performance-per-resource metrics. These findings provide practical guidance for designers leveraging VexRiscv in customized RISC-V implementations.

Unifying FuseSoC and SiliconCompiler

Duncan Parke

As python-based build systems such as FuseSoC and SiliconCompiler gain adoption across the industry, projects are becoming increasingly tied one ecosystem or another. This lock-in limits teams' ability to use hardware IP and leverage tool flows developed in other ecosystems.

This presentation introduces a new approach for interoperability between build systems, along with a supporting library that enables compatibility between FuseSoC's cores and SiliconCompiler's libraries. By lowering switching costs, we aim to increase IP reuse, reduce engineering duplication, and allow teams to choose the right tool for each stage of the design process

First Post-Efabless Silicon: Chipalooza, Tiny Tapeout, and Panamax

Tim Edwards

After the shutdown of Efabless in February 2025, Cadence ran their first shuttle on Sky130 with a generous invitation to the open source silicon community. I submitted five chips: Tiny Tapeout TT-06, to compare to the Efabless shuttle run; TT-09, a copy of the original lost Efabless TT-09, and TT-Cad25A, a combination of projects from TT-08 and the never-manufactured TT-10; Chipalooza projects 2, the second of the two planned analog projects chips from the Efabless Chipalooza contest; and Panamax FPGA, a demonstration of the 130-pin "Panamax" frame with a Fabulous FPGA project core. I will present on challenges of the tapeout as well as test results from the manufactured parts.

From Tapeouts to Products: Why Open-Source Silicon Must Solve Real Problems to Survive

Mohamed Kassem

Open-source silicon reaching real products is the moment the ecosystem matures from a research tool into infrastructure — the same transition Linux made when it started running production servers. Products impose the constraints that drive quality: a battery life target forces low- power verification, a temperature spec forces worst-case timing closure, a BOM cost goal forces die area discipline. These are the rigors that transform open IP blocks from tapeout artifacts into components the industry can trust, and that open custom silicon to the thousands of product companies that have never had access to it. The open-source stack is ready for this — open PDKs, automated RTL-to-GDSII, a proven SoC harness, and shared-wafer shuttles that make silicon accessible. The tools are no longer the barrier. The next step is ours to take.​​​​​​​​​​​​​​​​

Chipathon: Democratizing IC Design - A Global Open-Source Silicon Challenge for Education, Innovation, and Reproducibility

Mehdi Saligane

Open-source electronic design automation (EDA) tools and accessible fabrication platforms are transforming how integrated circuits are designed, enabling broader participation in silicon development beyond traditional industrial environments. The Chipathon is a global open-source IC design challenge organized under the IEEE Solid-State Circuits Society (SSCS) PICO (Platform for IC Design Outreach) initiative. The program aims to democratize chip design by providing students, educators, and researchers with a structured pathway to design, verify, and potentially fabricate integrated circuits using open-source tools and publicly accessible process design kits.

The Chipathon combines a multi-month design competition with a culminating workshop where participants present their designs, methodologies, and lessons learned. Teams develop innovative circuit blocks and systems across multiple tracks, including digital systems, analog and mixed-signal circuits, AI-assisted design flows, and reusable open-source building blocks. Emphasis is placed on reproducibility, open collaboration, and transparent evaluation through shared design artifacts, verification methodologies, and benchmark metrics.

By integrating education, open-source infrastructure, and real silicon opportunities, Chipathon lowers barriers to entry for integrated circuit design and fosters a new generation of hardware innovators. The program also serves as a testbed for emerging design methodologies—including AI-assisted EDA workflows—and promotes the development of reusable circuit intellectual property for the open-source hardware ecosystem. Through its global participation and collaborative spirit, Chipathon advances the SSCS mission of expanding access to chip design education and accelerating innovation in the semiconductor community.

Schedule

The conference will run over three days, Friday, May 1 to Sunday, May 3, 2026. We plan to start on Friday morning at 9am and end the conference on Sunday afternoon. When planning travel, we suggest you arrive Thursday evening or first thing Friday, and plan to leave Sunday afternoon or evening.

A conference social event will be arranged for Saturday evening. Friday evening will not be planned but often folks arrange their own informal dinner and drinks plans, which we encourage.

The detailed schedule of presentations will be available once we have all of the presentation submissions. All times are subject to change once we get closer to the event.

Friday: Conference

Conference from 9am - 6pm.

Saturday: Conference, lighning talks, and social event

Conference from 9am - 6pm.

Sunday: Unconference and workshops

On Sunday we will have an unconference and workshops to have more time for focused discussions. Even though the exact schedule and topics to talk about will be created together at the event, you can expect in-depth discussions with key stakeholders in Free and Open Source Silicon Projects, demo sessions, hackathrons, and more.

For exampe, at last year's ORConf we had fantastic sessions on

  • cocotb
  • EU Roadmap
  • Amaranth
  • Open Source DFT and in-field debug
  • Clash and Haskell
  • Surfer

What deep-dives will we have at Latch-Up? It's up to all of us!

Venue

Latch-Up 2026 will be held at the University of Waterloo in Ontario, Canada. The full address is: 200 University Avenue West, Waterloo, ON N2L 3G1