See the UltraScale Architecture SelectIO Resources User Guide (UG571) for a full list of attributes and constraints that can be applied to the I/O standards. To operate in LVAUX mode, additional considerations need to be taken into account if using the following attributes and constraints:
- IOSTANDARD Attribute
- DC I/O Levels contains the specifications of the LVAUX IOSTANDARDs.
- IBUF_LOW_PWR Attribute
- IBUF_LOW_PWR must be explicitly set to FALSE to operate in LVAUX
mode.
set_property IBUF_LOW_PWR FALSE [get_ports port_name]
- Output Drive Strength Attribute
- LVCMOS12_LVAUX is only allowed to have a drive strength of 8 mA.