I am looking to make a project that will use the 1.8V capability of the Au V2. I am not finding all the info I need to get started. Is there an actual guide on configuring the IOs to 1.8V.
I saw the table and know I need to drive the VBSEL_A high and the VBSEL_B low. Is there a specific place to drive these? Do I need to modify the board? Is it driven by the FPGA IOs? (The schematic doesn’t show an FPGA connection, so I assume no.) I assume that all the IOs on the mixed domain bank move at the same voltage, is this true?
Additionally, I am looking to use LVCMOS18 as the standard. But that is highlighted red in the IDE as an unsupported standard. Is there a better standard to use?
Hello,
About the pins, they are exposed on the C bank connector.
There is no place on the board itself to set them, if you have a Br, you might use it to access the pins and put a resistor.
If you are designing a custom carrier board, you should add the resistor there.
See Pinouts and Custom Elements if you haven’t already. The VBSEL pins are exposed, as @gc74 said, on the control bank. This lets you wire your custom board to set these correctly when connected. You can also use a Br to set them.
If you’re getting a error about unsupported standards, make sure that A) the pins are multi-voltage pins and B) no other multi-voltage pins are using an IO standard that requires a different VCCO.