2.1.1.6 XNOR Gate

To get a HIGH(1) output from an XNOR gate, the number of LOW(0) inputs must be odd. Looking at the truth table, TRUTH[0], TRUTH[3], TRUTH[5], and TRUTH[6] fulfill this requirement. This means that these must be HIGH(1) and the rest must be LOW(0), giving the hex value 0x69 to put into the TRUTHn register.

Figure 2-8. XNOR Gate