Introduction to Digital Systems: Modeling, Synthesis, and Simulation Using VHDL

6.8 XOR AND NXOR KARNAUGH MAPS

Certain patterns for a Karnaugh map should be recognized readily. These patterns are the XOR and NXOR logic functions, which can reduce greatly the implementation of the logic function. Figure 6.11 shows patterns of Karnaugh maps that result in a XOR logic expression. Similarly, Figure 6.12 shows the equivalent NXOR Karnaugh maps. NXOR are the complement of the XOR Karnaugh maps.