Looking at Table 99 of the Cyclone 10 GX Fabric and IO Handbook, I'm confused by the stated requirements for 3V IO banks.
The table shows a '-' for "Drive to GND" and "Drive to VCCIO" for the Power Up condition.
'-' means Not Applicable.
What's the requirement for this bank? Is the table conveying that the 3V I/O pins can not have a voltage applied to them during power up, or does the '-' mean that there is no requirement and any voltage within the maximum and minimum are permitted?
Also, it's strange that app note AN692 discusses specifically the 1.8V I/O and transceiver I/O for an unpowered FPGA but leaves out 3V I/O.
The table is meant to depict the conditions when 'Hot-Scoketing' may be acceptable and what unpowered pins can tolerate.
The way I read the table is, for 3VIO banks 'Hot-Socketing' is Not Applicable. So, an unpowered 3VIO bank pin should NOT be driven to GND/VCCIO externally during power-up. During power-down, the unpowered pin and still be driven to GND but not VCCIO.
Hope this helps.
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