DJ🌞17h ago
mole99

And another chip submitted for tapeout - HeiChips 🎉

This one has been in the works for some time, but since the shuttle was canceled last fall, it was postponed to a later one.

It's an open-source chip featuring user projects created by participants of the HeiChips Summer School 2025 (https://heichips.github.io/). How cool is that?
The chip uses 9mm² of silicon on SG13CMOS and has been submitted to IHP's Low-Cost MPW shuttle (https://dk.ihp-microelectronics.com/OpenSourceRequest.php).

More below ⬇️

#FPGA #ASIC #OpenSource

Mar 31 at 8:41amWeb
Show threadmole9918h ago
The stats are: 14 user projects, two of which are large slots and four of which are analog/mixed-signal designs.
At the center is a reprogrammable FPGA fabric that connects all the user projects, the I/Os, and the SRAM.
Show threadmole9918h ago

HeiChips includes a variety of incredible user projects, among them: two different RISC-V cores, an 8-bit CPU, waveform + tone generation, a USB CDC core, a systolic array (4x4 matrices), a cryo DAC, an experimental 10 Mbps Ethernet PHY, analog standard cells and floating-gate structures, and many more! ✨

For more information about the chip and the user projects, check out the tapeout repository: https://github.com/FPGA-Research/heichips25-tapeout

Show threadmole9918h ago
To test a user project, first upload a bitstream to the FPGA which selects the project and connects it to the I/Os and SRAM as required. The bitstream is created using Yosys and nextpnr - a complete open-source FPGA toolchain.
Show threadmole9918h ago

I'm incredibly happy to have worked on this chip! It utilizes LibreLane 3.0 (https://librelane.org) and its latest features, such as automated analog routing through non-default rules. The complete, tapeout-ready chip can be generated with just one command.

Thanks to everyone involved and for the support by Heidelberg University, BMFTR (the German Federal Ministry of Research, Technology and Space) and Chipdesign Germany for making HeiChips possible. Thank you!

LibreLane - ASIC flow infrastructure library

Show threadmole9918h ago

Here are some further links:

Tapeout repository: https://github.com/FPGA-Research/heichips25-tapeout
LibreLane: https://librelane.org/
IHP Open PDK: https://github.com/IHP-GmbH/IHP-Open-PDK
FABulous: https://github.com/FPGA-Research/FABulous

GitHub - FPGA-Research/heichips25-tapeout: HeiChips 2025 Tapeout on IHP SG13G2 130nm process

HeiChips 2025 Tapeout on IHP SG13G2 130nm process. Contribute to FPGA-Research/heichips25-tapeout development by creating an account on GitHub.

GitHub