Pins low during initialization


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The closest that I know is to disconnect HSWAP which would leave the I/O pins floating. It wouldn't be low, but would just float... You would also need to cut or lift the HSWAP pin on the FPGA which would be a pain... This is from the datasheet:

A Low level applied to the HSWAP input enables pull-up

resistors on user-I/O and input-only pins from power-on

throughout configuration. A High level on HSWAP disables

the pull-up resistors, allowing the I/Os to float. HSWAP contains

a weak pull-up and defaults to High if left floating.

By default I have HSWAP connected to GND which pulls all I/O up to VCC during configuration...


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