EDN Magazine — 05.12.94 Transition maps guide successful asynchronous state-machine design (figure)

FIGURE 4

Fig 4—Case 1: This circuit (a) contains a noncritical race condition. If the circuit powers up in the stable-state ABZQ=1101, it responds in two ways to a negative transition in A. As the transition map (b) shows, both responses attain the same end state. The time required to settle, however, varies with the path.

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