68300

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@....