e> (Or "RS flip-flop") A "set/reset" ef="module.php?name=Lexikon&file=search&eid=1&query=flip-flop">flip-flop in which activating the "S" input will switch it to one stable state and activating the "R" input will switch it to the other state. The outputs of a basic SR flip-flop change whenever its R or S inputs change appropriately. A clocked SR flip-flop has an extra clock input which enables or disables the other two inputs. When they are disabled the outputs remain constant. If we connect two clocked SR flip-flops so that the Q and /Q outputs of the first, "master" flip-flop drive the S and R inputs of the second, "slave" flip-flop, and we drive the slave' s clock input with an inverted version of the master' s clock, then we have an ef="module.php?name=Lexikon&file=search&eid=1&query=edge-triggered">edge-triggered RS flip-flop. Theexternal R and S inputs of this device are latched on oneedge (transition) of the clock (e.g. the falling edge) and the outputs will only change on the next opposite (rising) edge. If both R and S inputs are active (when enabled), a {race condition} occurs and the outputs will be in an indeterminate state. A ef="module.php?name=Lexikon&file=search&eid=1&query=JK flip-flop">JK flip-flop avoids this possibility. ef="http://www.play-hookey.com/digital/logic4.html">. (1997-05-15)