Monday MPW-2 Update - Oct 3, 2022

Hello everyone,

Please see updates for this week.

MPW-2 Silicon Testing

• Testing continues using IO characterized configuration for parts as we extend functional test coverage  CPU stress, openRAM, DFFRAM, IRQ, UART, etc.

• We are continuing to build additional test setups that include the updated Caravel board supporting the breakout boards from MPW-2.  The additional setups will allow us to run more part testing in parallel.

• A sample from each project is being retained by Efabless to be included in the testing.

MPW-2 Hardware

• Caravel Nucleo Hat boards are back and have completed functional test verification.

• Testing has confirmed the ability to perform a range of functions from the Nucleo development board required to support automated testing including 

• updating firmware to Flash through the housekeeping SPI interface

• programming voltage levels for both the 1v8 and 3v3 supplies

• reading and writing digital values to all Caravel IO pads

• supplying a programmable clock frequency to Caravel through a PWM driver from Nucleo

• The Nucleo-based kit will be shipped to project owners with preinstalled software to allow users to automatically test parts for their project and identify the ‘string’ required to configure IO.

• The updated Caravel Hat boards have been submitted to the board house for fabrication and assembly.  We are waiting for the confirmed delivery date but expect it to be a 7 day turnaround which would have boards back to Efabless on Wednesday, October 12.

Regards,

Jeff DiCorpo