Engineering Digital Design

16.3 ASYNCHRONOUS PROGRAMMABLE SEQUENCERS 823

oscillator circuits, of the type used in high-quality synchronous designs, are precise and have

a number of desirable characteristics not found in the internal clock-generating circuits of

the EAIC system. These desirable characteristics are discussed in Section 11.6.

16.3 ASYNCHRONOUS PROGRAMMABLE SEQUENCERS

In Chapter 14, it is made clear that any FSM that is designed to operate in the fundamental

mode must be free of certain timing defects that would otherwise cause the FSM to fail.

Such timing defects include endless cycles, critical races, static hazards in the NS logic, and

essential hazards. Normally, it is not difficult to eliminate these defects, but the task can be

tedious and does require a