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Altera_Forum's avatar
Altera_Forum
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10 years ago

Possible causes of dead cyclone IV on custom board

Hello, i designed and soldered my first fpga board using cyclone IV in the 144 eqfp package. First of all, i made following mistakes: I am using 3.3V VCCIO for all IO banks. I misread the han...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Today i built a second board (it is a small board, so i decided not only to change the FPGA, but to go for another complete try). I repaired the voltage mismatch and was more careful while soldering. And guess what. This time it worked. So it was either the wrong voltage what killed my FPGA, or (the more likely) lousy soldering on my part. (Not properly connected e-pad maybe? Or i just killed it by some solder bridges.)

On the other hand, considering that this was my first SMD soldering (not counting few smd capacitors) i guess soldering altera's eqfp-144 is not so bad. :-)

Anyway thank you for your good advice. I appreciate your help.

Arnost