746 CHAPTER 14 / ASYNCHRONOUS STATE MACHINE DESIGN AND ANALYSIS
in Fig. 14.27 and considering the indirect path requirements listed in Subsection 14.10.4,
the possible E-hazards and d-trios can be easily determined. However, before continuing
in this section, the reader should review the E-hazard analysis of FSMs as discussed in
connection with Figs. 14.28, 14.29, and 14.30. With reference to the various gate numbers
and delay positions (E
1
, D
1
, E
2
, D
2
) in Fig. 14.43a, the following summarizes the ideal
requirements for activation of the E-hazards and d-trios in the PSM:
1. The E
1
-hazard path is 00 →10 →11 →01 for input conditions E
¯
CM →ECM while
in origin state 00 with a theoretical activation delay of t
E
1
> (τ
1
+ τ
2
+ τ
6
)onthe
C input to ANDing race ...