Designer does not alter locked pins during Layout. Designer recognizes pins as locked when they are assigned in one of the following ways:
Manually using PinEditor in a design schematic
Using a pin file (all Antifuse families except for Axcelerator)
Using a PDC file (ProASIC3E, ProASIC3, and Axcelerator families only)
Using a GCF file (Flash families only)
Locked pins are permanent, provided that you commit your locked pins to your design before you exit PinEditor. To save changes to disk (in your .adb file), use the Save command in Designer before exiting PinEditor.
To lock pins:
Select the pin(s) to lock in the Assigned list box, Package window, or I/O Attribute Editor. To select multiple pins, hold down the CTRL key and select multiple pins. To select all pins, from the Edit menu, choose Select All.
From the Edit menu, choose Lock, or select the Locked check box in the I/O Attribute Editor.
Note: When you use the I/O Attribute Editor, you can only lock one pin at a time.
To unlock a pin:
Select the pin(s) to unlock in the Assigned list box, Package window, or I/O Attribute Editor. To select multiple pins, hold down the CTRL key and select multiple pins. To select all pins, from the Edit menu, choose Select All.
From the Edit menu, choose Unlock, or clear the Locked check box in the I/O Attribute Editor.