is a NOR Latch, or RS flip-flop. As shown in Table 45-1, a low R and a low S produce the inactive state ; in this state, the circuit stores or remembers. A low R and S high S represent the set state, while a high R and a low S give the reset state. Finally, a high R and a high S produce an invalid condition, where the output is uncertain; therefore, we must avoid R=1 and S=1 when using a NOR latch.