XNOR2-9

Libraries GuideChapter 10: Design Elements (SOP3 to XORCY_L)

XNOR2-9

2- to 9-Input XNOR Gates with Non-Inverted Inputs

Element	XC3000	XC4000E	XC4000X	XC5200	XC9000	Spartan	SpartanXL	Spartan2	Virtex
XNOR2, XNOR3, XNOR4	Primitive	Primitive	Primitive	Primitive	Primitive	Primitive	Primitive	Primitive	Primitive
XNOR5	Primitive	Primitive	Primitive	Macro	Macro	Primitive	Primitive	Primitive	Primitive
XNOR6, XNOR7, XNOR8, XNOR9	Macro	Macro	Macro	Macro	Macro	Macro	Macro	Macro	Macro

Figure 10.12 XNOR Gate Representations

The XNOR function is performed in the Configurable Logic Block (CLB) function generators in XC3000, XC4000, Spartan, and SpartanXL. XNOR functions of up to nine inputs are available. All inputs are non-inverting. Because each input uses a CLB resource, replace functions with unused inputs with functions having the necessary number of inputs.

Figure 10.13 XNOR5 Implementation XC5200

Figure 10.14 XNOR5 Implementation XC9000

Figure 10.15 XNOR6 Implementation XC9000

Figure 10.16 XNOR7 Implementation XC3000

Figure 10.17 XNOR7 Implementation XC4000E, XC4000X, XC5200, Spartan, SpartanXL

Figure 10.18 XNOR7 Implementation XC9000

Figure 10.19 XNOR7 Implementation Spartan2, Virtex

Figure 10.20 XNOR8 Implementation XC3000

Figure 10.21 XNOR8 Implementation XC4000E, XC4000X, XC5200, Spartan, SpartanXL

Figure 10.22 XNOR8 Implementation XC9000

Figure 10.23 XNOR8 Implementation Spartan2, Virtex

Figure 10.24 XNOR9 Implementation XC3000

Figure 10.25 XNOR9 Implementation XC4000E, XC4000X, XC5200, Spartan, SpartanXL

Figure 10.26 XNOR9 Implementation XC9000

Figure 10.27 XNOR9 Implementation Spartan2, Virtex