10.1.2.3 Adder Parameter Description

The following table describes all the parameters of an adder.

Table 10-8. Parameter Description
Parameter	Family	Value	Description
WIDTHA	ProASICPLUS	2–128	Word length of DataA, DataB and Sum
	Axcelerator	2–156
	All others	2–32
MAXFANOUT	500K, PA	0	Automatic choice
MAXFANOUT	500K, PA	2–16	Manual setting of Max. Fanout
CI_POLARITY	ALL	0 1 2	Carry-in polarity (active low, active high and not used)
CO_POLARITY	ALL	0 1 2	Carry-out polarity (active low, active high and not used)

Note: The Brent-Kung adder extends the ranges from 32 to 128 bit for SX, SX-A and from 20 to 128 bit for 500K.