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Altera_Forum's avatar
Altera_Forum
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15 years ago

short circuit on IO

Hello everybody What happens when I have a CycloneII IO pin physicaly connected to GND and I drive it with logic high, i.e. a short circuit. Does this blow the FPGA or is there some protection a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

There's no protection, and the current will most likely exceed the 25 mA rating for an output pin, unless you set the lowest drive strength. In so far, the device could be damaged. By experience, I can tell, there's a good chance that the FPGA survives shorting individual pins.