Quick question... I've been using a Virtex-E fpga on a development board that provides jumpers to connect or disconnect Vcco for each I/O bank. Some of my inputs are LVDS, and one of my signal sources has LVDS output that swings up as high as ~2.4V at the highest. On one of my last test runs I accidentally left the Vcco jumper uninstalled for the IO bank that this device was connected to, meaning that Vcco for that bank was left floating. To make a long story short, much current was drawn, and now (probing the FPGA pins directly) Vcco for that I/O bank appears to be shorted to ground inside the chip package(~1.5 ohms from Vcco pin to Gnd pin).
To anyone out there who's familiar with Xilinx hardware, would the mistake I made above (no Vcco for a ~2.4V input LVDS signal) have caused the IO bank to become damaged? I'd just like some confirmation that this is the cause, before I power up the FPGA board and fry another IO bank...