For example, a pin with a fan-in of 2 counts as two electrical loads in L fo and one physical pin when looking up L net . If a fan-out load is found to be excessive, the circuit must be corrected before proceeding with the timing analysis. L fo is the sum of all fan-out loads. L fo is expressed in load units. The load a macro presents to a driving macro is part of the macro specifications.
L wo is expressed in load units.
If it is legal for the array, the presence of a wire-OR in a net will affect both the electrical and the physical loading in the net. Within an array series, the k-Factors vary by macro option and by edge direction. Computing L fo Compute L fo by adding the sum of the electrical loads of all loads driven. If a destination pin has a fan-in of 2, it counts as two electrical loads and as one physical pin. A destination may appear to have two physical loads internal to the macro.