Monday MPW-2 Update - Sep 26, 2022

96 views
Skip to first unread message

Jeff

unread,
Sep 27, 2022, 12:36:36 PM9/27/22
to skywater-p...@googlegroups.com

Hello everyone,


Please see updates for this week.


MPW-2 Silicon Testing


I/O Configuration


  • Automated testing has been completed across 18 parts.  


  • Tests have been repeated across multiple test setups and run across operating voltages from 1.5 to 1.8V.  


  • The optimal operating voltage for configuring IO ranges from part to part.


  • We continue to find 4 out of the 18 parts can be fully configured with all IO.  Many of the others can configure 70-85% of the IO.


  • We have also brought up a second automated test setup and are working through debug to get it running in parallel.


Caravel Functionality


  • Extended function testing is running on parts with full IO configurations.  


  • Tests include CPU stress, openRAM, DFFRAM, IRQ, UART, and other testing


  • Test results will be available in the next day or so


Automation


  • Temperature testing will be performed after the functional testing above completes.



MPW-2 Hardware


  • 363 breakout board assemblies are back.  The remaining assemblies are expected to arrive in the next day or two.


20220926_214102.png


  • Samples for the main Caravel board have returned and passed an initial initial testing.

20220926_214042.png


The following video shows installation of pins as well as flashing firmware and running a simple blink test.


image.png



https://youtu.be/thXuYkltXbo



  • Initial samples for a similar board in a Nucleo hat format are being fabricated for testing.  Firmware for the configuration uses Micropython on the development board and initial testing has been completed on the Nucleo board talking to a Caravel.



  • The configuration will allow users to automate testing parts for their own projects to identify the part that will configure all IO required for their project and provide a configuration ‘string’ to be used by their firmware for setting up IO.


  • We are working to get the complete test configuration assemblies complete for shipping with the breakout boards to each project owner. 


  • If anyone wishes to receive their parts ahead of getting the main board plus Nucleo setup, please reach out to me on Slack at @jeffdi or via email at open...@efabless.com



MPW-2 Simulation


  • We now have STA and simulation results that are consistent with failures seen in Silicon testing. 


  • This now allows for implementing changes to correct the timing issues and confirm through analysis and simulation that they have been resolved.



-- Jeff
Reply all
Reply to author
Forward
0 new messages