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Altera_Forum
Honored Contributor
Honored ContributorPin Damaged question
hello, we are using altera Cyclone1 EP1C6.. we use the IC in an I/O application.. the I/O pins of the IC are connected to external device and user can touch these pins by touching the end ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- how can that happen?? --- Quote End --- It can be easily achieved by applying a sufficient high overvoltage or overcurrent to the respective pin. --- Quote Start --- and how the short is still exist even we disconnect the power from the FPGA,is it volatile?? --- Quote End --- Simply assume, that a semiconductor structure inside the chip, e.g. an output transistor has been destroyed by applying too much energy and forms a permanent short now. --- Quote Start --- and how to protect the I/O pins of the FPGA to not damage any more?? --- Quote End --- Design a circuit, that keeps the FPGA's specified maximum ratings in any situation. Exposing FPGA pins directly to "outer world" should be avoided if possible, but with well designed protection networks, it can be safe.
