layouts. Because the 1.8V domains are no longer within the pad
ring buses, they need to be connected together in the cell. These
internal lines were previously in the power routing cells.
continuous ring of vccd and vssd. The clamp connections for the
vccd1/vssd1 and vccd2/vssd2 pads still need to be done, although
the pads themselves have been changed to the base cell, matching
the new verilog RTL.
Tim Edwards