To access this dialog, from the Edit menu, choose I/O Bank Settings.
Use this dialog to assign I/O technologies to I/O banks in ProASIC3E and Axcelerator devices.
Choose Bank
Choose a bank from the drop-down menu. If you do not assign I/O standards to a bank, that bank uses the default standard selected in the Device Selection Wizard.
Select all technologies that the bank should support
Selecting an I/O standard selects all compatible standards and grays out incompatible ones. For example, selecting LVTTL also selects PCI, PCIX, and LVPECL, since they all have the same VCCI. Further, selecting GTLP (3.3V) disables SSTL3 as an option because the VREFs of the two are not the same.
VCCI
Each I/O bank has a common supply voltage, VCCI, for the I/Os within that bank.
VREF
A voltage referenced I/O input (VREF) requires an input referenced voltage. You must assign VREF pins to Axcelerator and ProASIC3E devices before running Layout.
Note: You cannot assign VREF pins in ProASIC3 devices.
Use default pins for VREFs
Select this check box to set default VREF pins and unset non-default VREF pins. If you unselect this option when setting a new VREF technology, no VREF pins are set. If you unselect this option when default VREF pins are already set, it unsets them.
Click More Attributes to set the low-power mode and input delay. (These attributes are not supported in RTAXS, ProASIC3, and ProASIC3E devices.)
Click Apply to assign the selected I/O standards to the selected bank. Any previously assigned I/Os in the bank that are no longer compatible with the standards applied are unassigned.