IO Placement / Pin placement

   If you are doing a digital-top design, you need to place IO pads and IO buffers of the chip.Take a reactangular or square chip that has pads in four sides.To start with, you may get the sides and relative positions of the PADs from the designers. You will also get a maximum and minimum die size according to the package you have selected. To place IOs, people mainly use a perl script to place them.