Hello, I would like to operate peripherals on the kc705 FMC HPC connector at 3.3 V, both input and output. Can this be achieved by just setting the IOStandard to LVCMOS33 in the fmc_adapter_io list in the gateware?
I ask because the kc705 manual states that all the I/O voltage rails are set to 2.5V by default, including the FMC voltage rails. It also says that to change FMC_VADJ to 3.3 V, you have to remove a jumper and reprogram some TI controller. However, in the artiq gateware directory (e.g. nist_qc1.py), I see LVTTL IOStandards, which means they're already operating at 3.3 V. This is why I'm confused about what I need to do to work at 3.3 V off the FMC connector. Thanks, Jonathan
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