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三、计数型的状态控制器设计当控制的状态数目较多并采用移位型的状态控制器时,触发器的数量将会过多。选用计数型的状态控制器,能够避免这一缺点。因为计数型的状态控制器是用触发器状态的不同组合,表示系统的各种不同状态,而不是用单独一个触发器表示系统的一个状态。因此,同样的状态数,触发器的数量可以减少。但它的组合线路由于需要输出译码,显得比较复杂,设计上也比移位型的麻烦一些。
Third, the count-type state controller design When the number of control states and the use of shift state controller, the trigger will be too much. The use of count-type state controller, to avoid this shortcoming. Because count-based state controllers use different combinations of flip-flop states to represent various states of the system, rather than using a single flip-flop to indicate a state of the system. Therefore, the same number of states, the number of flip-flops can be reduced. But its combination of lines due to the need to output decoding, it is more complicated, the design is also more than the shift type of trouble.