Locking Down I/O Locations
Place (or lock) IOBs down late in the design cycle
- Pin locking makes routing more difficult
To define I/O pad locations, assign a location constraint to the IOB
- Create a file in the project directory with name design.ucf
- Syntax: INST Q0_LOɜ>_pad LOC = P59;
- More information on location constraints will be discussed later