68300

Jeff,

What's the storey here?  Do you need a couple of samples for Motorola.  I know some people there and perhaps I can put in a good word for you.  Send me your physical shipping address.

Regards,

Charlie
  ----- Original Message ----- 
  From: Jeff 
  To: 68300@yahoogroups.com 
  Sent: Wednesday, September 11, 2002 8:51 PM
  Subject: [68300] dead (?) CPU


  I built up two prototypes of a 68F375 circuit using short-run 
  prototypes from one of the dirt cheap manufacturers.  The 3.3V bus 
  was shorted to the ground plane at one via (able to withstand one 
  amp).

  The chip is dual supply -- 3.3V core and 5V periphery, etc.

  This means it saw 5V while the 3.3V supply was at 0.4V.

  I found and surgically corrected the PCB.  Power is now good, but the 
  chip will not respond to the background debugger monitor (PE Micro 
  ICD32).

  Question -- is it a foregone conclusion that I toasted the chip by 
  applying 5V without good power on 3.3V?  I DO have a second board but 
  wish to test as much as possible with this one as possible.  I do 
  have a tray of parts on order (19 WEEKS???) but have only two samples 
  on hand.

  respond here or directly to andle@....


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