The following table shows which families support this constraint and which file formats and tools you can use to enter or modify it:
|
Families |
PDC |
I/O Attribute Editor |
ChipPlanner |
|
Fusion |
X |
X |
X |
|
ProASIC3E |
X |
X |
X |
|
ProASIC3 |
X |
X |
X |
|
ProASIC PLUS |
|
X |
X |
|
Axcelerator |
X |
X |
X |
|
ProASIC 500K |
|
X |
X |
|
eX |
|
|
|
|
SX-A |
|
|
|
|
SX |
|
|
|
|
MX |
|
|
|
|
3200DX |
|
|
|
|
ACT3 |
|
|
|
|
ACT2/1200XL |
|
|
|
|
ACT1 |
|
|
|
Use this constraint to either reset an I/O to its default settings or to unassign an I/O.
Attributes for an I/O, such as I/O standard, I/O threshold, Output drive, and so on, can be restored to their default values. There are no I/O banks in ProASIC PLUS or ProASIC devices; however, you can unassign I/Os in these devices using the MultiView Navigator's ChipPlanner tool.
You can use one or more of the following commands or GUI tools to restore I/O attributes:
PDC - reset_io
I/O Attribute Editor - Editing I/O Attributes
ChipPlanner - Unassigning Pins