The IC includes a clock tree for delivering {HEAD ~ a clock signal} from {TAIL ~ its root} to all clocked devices within the IC external to the macro cell, and to a root of a clock tree subtree included within the macro cell for delivering the clock signal from its root to sinks residing within the macro cell 
The IC includes a clock tree for delivering { HEAD ~ a clock signal } from { TAIL ~ its root } to all clocked devices within the IC external to the macro cell , and to a root of a clock tree subtree included within the macro cell for delivering the clock signal from its root to sinks residing within the macro cell
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH