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power part 2

A project log for Trimble Yuma 7 Data Extraction

Trimble Yuma 7 Rugged Tablet has failed but need to extract the data from the embedded SSD.

saabmanSaabman 02/13/2023 at 11:160 Comments

Reading through the data sheet in a bit more depth it does mention that VCCQ can operate at either 1.7-1.95V OR 2.7-3.6V now that simplifies things some what. I was starting to consider adding a 1.8V regulator to the mix but it loks like I can run it all off the 3.3V rail. Though the Data sheet does have a bit of a criptic Note "Device operation under 3.3V VCCQ is limited to Max 1 hour. " I take that to mean if I run it at 3.3 V I can only run it for a max of 1 hour. That constraint I can live in I only need to make one image of the drive and I'm done. 

Started pulling some decoupling caps off the board to reuse direct on the chip - damn some of them are tiny - thank God for microscopes - must get better tweezers though.

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